start-ver=1.4 cd-journal=joma no-vol=89 cd-vols= no-issue=2 article-no= start-page=87 end-page=95 dt-received= dt-revised= dt-accepted= dt-pub-year=2020 dt-pub=2020 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Propagation and Floral Induction of Transplant for Forcing Long-term Production of Seasonal Flowering Strawberries in Japan en-subtitle= kn-subtitle= en-abstract= kn-abstract=In Japan, over 95% of the acreage is covered with plastic to force June-bearing (seasonal flowering, SF) strawberry cultivars to produce fruit from late fall to early summer. During the late 1960s, a forcing technique was developed that advanced flower bud initiation to late summer and prevented the transplants from becoming dormant during winter. This new forcing technique involved nitrogen starvation of nursery plants to induce floral initiation. Until about 1980, strawberry growers in Japan used runner plants produced in waiting beds, but most transplants are now produced in plastic pots under rain shelters to avoid soil-borne diseases. Recently, the use of tray plants produced from hanging runner cuttings has become popular. To induce early floral initiation, the following artificial low temperature (LT) treatments have been established: (1) “Yarei”, a combination of a short day with solar radiation and LT under darkness in cooling facilities (Yarei-ko); (2) “Kaburei”, continuous dark-LT with refrigeration facilities including industrial warehouses; and (3) “Kanketsu-reizo”, intermittent LT storage. An overview of the technologies applied to plant propagation and the control of floral initiation of Japanese SF cultivars is provided in this review. en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NishimotoToshi en-aut-sei=Nishimoto en-aut-mei=Toshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=2 en-affil=Nara Prefecture Agricultural Research and Development Center kn-affil= END start-ver=1.4 cd-journal=joma no-vol=89 cd-vols= no-issue=1 article-no= start-page=22 end-page=29 dt-received= dt-revised= dt-accepted= dt-pub-year=2020 dt-pub=2020 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effect of Defoliation on Blossom-end Rot Incidence and Calcium Transport into Fruit of Tomato Cultivars Under Moderate Water Stress en-subtitle= kn-subtitle= en-abstract= kn-abstract=The translocation of calcium (Ca) within the tomato plant and the causes of Ca deficiency, a factor associated with blossom-end rot (BER) in fruit, are still a matter of conjecture. The objective of this study was to determine the effect of defoliation on BER incidence and Ca transport into different size tomato fruit cultivars. Four experiments were conducted. The start and end dates for each experiment were; 14 March?2 May, 22 July?23 August, 30 August?7 October 2017, and 20 May?25 June 2018, for experiments 1, 2, 3, and 4, respectively. Five tomato cultivars including one large (‘Momotaro fight (MF)’, ? 200 g), three medium (‘Lui 60 (L60)’, ‘Tio cook (TC)’, and ‘Cindy sweet (CS)’, 30?80 g), and one small (‘Pepe (PP)’, ? 20 g) fruit cultivars, respectively, were grown under moderate water stress controlled by a combination of root zone restriction and solar mediated fertigation. Leaf area of plants was reduced by 20?30% by removing alternate leaflets on all leaves. Defoliation significantly reduced BER in all experiments. In experiment 4, no BER was observed in defoliated plants of L60 and PP, and in MF and TC, BER incidence decreased to a quarter of the control. Defoliation increased the fruit growth rate (FGR) in experiment 1, in which the temperature was the lowest, by a ratio of 1.42 and by 1.39 in experiment 4, in which the radiation was strongest and day length longest. Defoliation increased the rate of daily Ca transport into fruit (CTR) in MF, L60, TC, CS, and PP by average ratios of 1.64, 1.55, 1.35, 1.30, and 1.13, respectively. The increase in CTR in defoliated plants was highest in experiment 4 with a ratio of 1.68 followed by 1.37, 1.33, and 1.28 in experiments 1, 3, and 2, respectively. Defoliation increased both FGR and CTR and there were significant linear relationships between them. However, the degree of increase was larger in CTR than that in FGR, especially in the BER-sensitive large fruit cultivar MF, and defoliation increased the total Ca concentration in fruit accordingly. We conclude that under moderate water stress by root zone restriction and certain other BER inductive conditions, defoliation could be a promising approach to reduce BER incidence by improving Ca nutrition in susceptible large fruit cultivars. en-copyright= kn-copyright= en-aut-name=IndecheAnnah Khatenje en-aut-sei=Indeche en-aut-mei=Annah Khatenje kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=YasubaKen-ichiro en-aut-sei=Yasuba en-aut-mei=Ken-ichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TanakaYoshiyuki en-aut-sei=Tanaka en-aut-mei=Yoshiyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=3 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=4 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=5 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= END start-ver=1.4 cd-journal=joma no-vol=40 cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2018 dt-pub=20180401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=序 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター END start-ver=1.4 cd-journal=joma no-vol=88 cd-vols= no-issue=1 article-no= start-page=1 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2019 dt-pub=20190131 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Publication of the first special issue of The Horticulture Journal Preface en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= affil-num=1 en-affil=Okayama University kn-affil= END start-ver=1.4 cd-journal=joma no-vol=109 cd-vols= no-issue= article-no= start-page=21 end-page=27 dt-received= dt-revised= dt-accepted= dt-pub-year=2020 dt-pub=20200201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Defoliating to 12-15 leaves increases calcium concentration and decreases blossom-end rot incidence in fruit of tomato plant grown under moderate water stress en-subtitle= kn-subtitle= en-abstract= kn-abstract= The objectives of this study were to (i) determine the optimum number of whole leaves to retain on a tomato plant for effective blossom-end rot (BER) management and (ii) explore the relationship between shoot calcium (Ca) and fruit Ca in non-defoliated plants in two different sized fruit cultivars, a large-fruited cultivar ‘Momotaro fight’ and a medium-fruited cultivar ‘Cindy sweet’. Treatments involved maintaining 18, 15 and 12 leaves on a plant. All lateral shoots were removed regularly throughout the growing period except the shoot closest to the flowering truss in the 18-leaf treatment. At the length of 10cm, these shoots were sampled for real time Ca determination using a hand held Ca2+ meter. In the plants defoliated to 18 leaves, BER was higher in ‘Momotaro fight’ at 10% compared to 2% in ‘Cindy sweet’. Fruit growth rate was significantly increased by defoliation in ‘Momotaro fight’, however no significant difference was observed among treatments in ‘Cindy sweet’. Defoliating to 12 leaves increased daily Ca transport rate by 59% and 37% in ‘Momotaro fight’ and ‘Cindy sweet’, respectively. Defoliating to 12 leaves increased the water-soluble Ca concentration in the distal part of fruit by 34% and 14% in ‘Momotaro fight’ and ‘Cindy sweet’, respectively. In the plants defoliated to 18 leaves where only old yellowish leaves were removed, a significant steady decrease was observed in the concentration of water soluble Ca in the distal part of fruit with increase in truss order. There was a significant linear relationship between water-soluble Ca concentration in the distal part of the fruit and Ca concentration in the lateral shoot of plants defoliated to 18 leaves. We conclude that under moderate water stress by root zone restriction and also certain other BER inductive conditions, defoliation to 12?15 leaves on a tomato plant should be a promising approach for decreasing BER incidence in susceptible large fruit cultivars. en-copyright= kn-copyright= en-aut-name=Annah Khatenje Indeche en-aut-sei=Annah Khatenje Indeche en-aut-mei= kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MiyajiDaisuke en-aut-sei=Miyaji en-aut-mei=Daisuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=YasubaKen-ichiro en-aut-sei=Yasuba en-aut-mei=Ken-ichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=TanakaYoshiyuki en-aut-sei=Tanaka en-aut-mei=Yoshiyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= affil-num=1 en-affil=Graduate school of Environmental and Life Science, Okayama University kn-affil= affil-num=2 en-affil=Graduate school of Environmental and Life Science, Okayama University kn-affil= affil-num=3 en-affil=Field Science Center kn-affil= affil-num=4 en-affil=Graduate school of Environmental and Life Science, Okayama University kn-affil= affil-num=5 en-affil=Graduate school of Environmental and Life Science, Okayama University kn-affil= affil-num=6 en-affil=Graduate School of Agriculture, Kyoto University kn-affil= en-keyword=BER management kn-keyword=BER management en-keyword=defoliation kn-keyword=defoliation en-keyword=water-soluble Ca kn-keyword=water-soluble Ca en-keyword= lateral shoot Ca kn-keyword= lateral shoot Ca en-keyword=root zone restriction kn-keyword=root zone restriction END start-ver=1.4 cd-journal=joma no-vol=108 cd-vols= no-issue= article-no= start-page=5 end-page=13 dt-received= dt-revised= dt-accepted= dt-pub-year=2019 dt-pub=20190201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Effect of boron deficiency on tip burn and malformed fruit incidence in strawberries kn-title=B（ホウ素）欠乏処理がイチゴのチップバーンおよび受精不良果発生に及ぼす影響 en-subtitle= kn-subtitle= en-abstract=　B（ホウ素）は植物にとって必須な微量要素であり，イチゴの受精不良果発生要因の1 つである．そこで2015年度と2016年度の2 回にわたりB 欠乏がイチゴの受精不良果発生に及ぼす影響について調査した．また，2016年度はB 欠乏処理後にB 回復処理を行い，その後のイチゴの果実形態の変化についても調査した．その結果，B欠乏処理を行うと蒸散機能の低い新葉や花芽においてチップバーンが発生し，種浮き果や部分不受精を主とした受精不良果が多発した．しかし，B 回復処理を行うことでこれらの症状が改善することが明らかになった．B は受精不良果発生に関係しており，欠乏条件下で根から吸収させると急速に若い成長中の組織に転流することが示されたことから，B 栄養をコントロールすることでB 不足によるイチゴの受精不良果発生を軽減できる可能性があると考えられる． kn-abstract=Boron (B) is an essential micro element for plants and plays important roles in the synthesis and functions of cell wall. B deficiency has been reported as one of the causes of fruit malformation in strawberries. We investigated the effect of B deficiency on flower and fruit development of forced strawberries for two cropping seasons (2015-2017). In the second season, B was resupplied for B-deficient plants and we investigated changes in fruit development. When B-free nutrient solutions were supplied, tip burn began to occur in newly emerging leaves and calyx 2 to 3 months later, and fruit malformation including seedy or only partly developed fruits with undeveloped achenes occurred frequently. However, these deficient symptoms were quickly disappeared by supplying B containing nutrient solutions. In conclusion, B nutrition is closely related to the occurrence of fruit malformation through fertility of pollen and pistils, and also development of receptacle tissue in strawberries. It should be possible to reduce fruit malformation in strawberries by proper control of B nutrition. en-copyright= kn-copyright= en-aut-name=SesumiMiho en-aut-sei=Sesumi en-aut-mei=Miho kn-aut-name=瀬角美穂 kn-aut-sei=瀬角 kn-aut-mei=美穂 aut-affil-num=1 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=2 ORCID= en-aut-name=KinjoAkari en-aut-sei=Kinjo en-aut-mei=Akari kn-aut-name=金城朱理 kn-aut-sei=金城 kn-aut-mei=朱理 aut-affil-num=3 ORCID= en-aut-name=HidakaKei en-aut-sei=Hidaka en-aut-mei=Kei kn-aut-name=日高啓 kn-aut-sei=日高 kn-aut-mei=啓 aut-affil-num=4 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=5 ORCID= en-aut-name=YasubaKen-ichiro en-aut-sei=Yasuba en-aut-mei=Ken-ichiro kn-aut-name=安場健一郎 kn-aut-sei=安場 kn-aut-mei=健一郎 aut-affil-num=6 ORCID= en-aut-name=TanakaYoshiyuki en-aut-sei=Tanaka en-aut-mei=Yoshiyuki kn-aut-name=田中義行 kn-aut-sei=田中 kn-aut-mei=義行 aut-affil-num=7 ORCID= affil-num=1 en-affil=Graduate school of Environmental and Life Science kn-affil=岡山大学大学院　環境生命科学研究科 affil-num=2 en-affil=Graduate school of Environmental and Life Science kn-affil=岡山大学大学院　環境生命科学研究科 affil-num=3 en-affil=Graduate school of Environmental and Life Science kn-affil=岡山大学大学院　環境生命科学研究科 affil-num=4 en-affil=Asahi Kagaku Kogyo Co., Ltd.) kn-affil=旭化学工業 affil-num=5 en-affil=Graduate school of Environmental and Life Science kn-affil=岡山大学大学院　環境生命科学研究科 affil-num=6 en-affil=Graduate school of Environmental and Life Science kn-affil=岡山大学大学院　環境生命科学研究科 affil-num=7 en-affil=Graduate school of Environmental and Life Science kn-affil=岡山大学大学院　環境生命科学研究科 en-keyword=floral organs kn-keyword=floral organs en-keyword=Fragaria × ananassa Duch. kn-keyword=Fragaria × ananassa Duch. en-keyword=pistil fertility kn-keyword=pistil fertility en-keyword=receptacle growth kn-keyword=receptacle growth en-keyword=seedy fruit kn-keyword=seedy fruit END start-ver=1.4 cd-journal=joma no-vol=39 cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2017 dt-pub=20170401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=序 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター END start-ver=1.4 cd-journal=joma no-vol=106 cd-vols= no-issue= article-no= start-page=27 end-page=32 dt-received= dt-revised= dt-accepted= dt-pub-year=2017 dt-pub=20170201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=トウガラシ（Capsicum baccatum）における カプサイシノイド含量の変異とその非辛味系統 kn-title=Variations in capsaicinoid contents in the chili pepper (Capsicum baccatum) and its non-pungent accessions en-subtitle= kn-subtitle= en-abstract=　トウガラシ（Capsicum 属）は世界的に重要な香辛料および野菜である．C. baccatum は南米原産のマイナーな栽培種であるが，果色，果形や辛味など果実形質に多様性が認められることから，トウガラシ遺伝資源として注目されている．トウガラシの辛味性についてはC. annuum 種において多くの研究が行われているが，C. baccatum 種においては十分研究されていない．
　本研究では，C. baccatum 36系統について辛味成分カプサイシノイドの含量を調査した．カプサイシノイド含量の幅は0 〜4,258 ? /gDW であった．また果実重と辛味成分含量の間に負の相関が認められた．C. baccatum の辛味は低?中程度であるが，非辛味系統はほとんど認められず，唯一1 系統（‘Kaleidoscope’）が非辛味であった．この非辛味の安定性を調査するために，辛味程度の異なる系統とともに異なる収穫時期におけるカプサイシノイド含量を調査した．
　他のC. baccatum 系統ではカプサイシノイド含量は収穫時期で変化したが，‘Kaleidoscope’ ではいずれの収穫時期でもカプサイシノイドは検出されなかった．本研究で見出された非辛味系統は将来のC. baccatum の育種において有用であろう． kn-abstract=The chili pepper (Capsicum) is both an important spice and fresh vegetable worldwide. C. baccatum is a lesser known domesticated species that is native to the Andean region. Fruit traits such as color, shape, and pungency markedly vary in this species. C. baccatum has potential as a bioresource for future chili pepper breeding programs. Although extensive studies have been conducted on the pungency of C. annuum, that of C. baccatum has not been examined in as much detail. In the present study, capsaicinoid contents were analyzed in 36 C. baccatum accessions. Capsaicinoid contents ranged between 0 and 4,258 μg/gDW. Furthermore, a negative relationship was observed between capsaicinoid contents and fruit weights. Although the pungency of C. baccatum is regarded as low-mild, very few non-pungent accessions were detected ; only one non-pungent accession (‘Kaleidoscope’) was identified among the C. baccatum accessions examined. In order to validate the stability of non-pungency in the accession, capsaicinoid contents were determined at different harvest dates, along with other accessions with different pungencies. Although capsaicinoid contents in other C. baccatum accessions changed with the picking date, capsaicinoid was not detected in ‘Kaleidoscope’ at any date. The non-pungent accession reported here may be useful for future C. baccatum pepper breeding programs. en-copyright= kn-copyright= en-aut-name=TanakaYoshiyuki en-aut-sei=Tanaka en-aut-mei=Yoshiyuki kn-aut-name=田中義行 kn-aut-sei=田中 kn-aut-mei=義行 aut-affil-num=1 ORCID= en-aut-name=HaraMotohito en-aut-sei=Hara en-aut-mei=Motohito kn-aut-name=原一仁 kn-aut-sei=原 kn-aut-mei=一仁 aut-affil-num=2 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=3 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=4 ORCID= en-aut-name=YasubaKen-ichiro en-aut-sei=Yasuba en-aut-mei=Ken-ichiro kn-aut-name=安場健一郎 kn-aut-sei=安場 kn-aut-mei=健一郎 aut-affil-num=5 ORCID= affil-num=1 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=2 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=3 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=4 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=5 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 en-keyword=Bio-resource kn-keyword=Bio-resource en-keyword=Fruit shape kn-keyword=Fruit shape END start-ver=1.4 cd-journal=joma no-vol=106 cd-vols= no-issue= article-no= start-page=21 end-page=25 dt-received= dt-revised= dt-accepted= dt-pub-year=2017 dt-pub=20170201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Effect of Beginning Date of Intermittent Low Temperature Treatments on Flowering of Tray-grown Strawberry 'Nyoho' kn-title=処理開始時期がトレイ育苗したイチゴ‘女峰’に対する 間欠冷蔵処理の効果発現に及ぼす影響 en-subtitle= kn-subtitle= en-abstract= kn-abstract=　Intermittent low temperature storage is expected to be a new artificial flower-inducing treatment and becoming to be a practical procedure as it does not require expensive equipment or much energy cost. Tray-grown ‘Nyoho’ plants were placed in a refrigerator (15°C, in the dark) for 3 days and then transferred to a further outdoor shelter for 3 days. Plants were transferred at noon and this cycle was repeated twice (3D/3D). Such 3D/3D treatments were begun on August 22, 25, 28, 31, and September 3and the effectiveness on flowering was determined for 2 years. Both in 2012 and 2013, treatments begun before August 28 were less effective compared to the treatments begun on August 28 or later. Continuous 6 days of 15°C storage (6D) was effective to some extent, but 6D from August 25 was apparently less effective compared to those begun later. Both in intermittent and continuous treatments for ‘Nyoho’, it was confirmed that any flower-inducing effect became relatively small and unstable when the treatments were begun before 28 August in Okayama. en-copyright= kn-copyright= en-aut-name=KinjoaAkari en-aut-sei=Kinjoa en-aut-mei=Akari kn-aut-name=金城朱理 kn-aut-sei=金城 kn-aut-mei=朱理 aut-affil-num=1 ORCID= en-aut-name=HanadaAtsushi en-aut-sei=Hanada en-aut-mei=Atsushi kn-aut-name=花田惇史 kn-aut-sei=花田 kn-aut-mei=惇史 aut-affil-num=2 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=3 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=4 ORCID= en-aut-name=YasubaKen-ichiro en-aut-sei=Yasuba en-aut-mei=Ken-ichiro kn-aut-name=安場健一郎 kn-aut-sei=安場 kn-aut-mei=健一郎 aut-affil-num=5 ORCID= en-aut-name=TanakaYoshiyuki en-aut-sei=Tanaka en-aut-mei=Yoshiyuki kn-aut-name=田中義行 kn-aut-sei=田中 kn-aut-mei=義行 aut-affil-num=6 ORCID= en-aut-name=YoshidaAtsuko en-aut-sei=Yoshida en-aut-mei=Atsuko kn-aut-name=吉田敦子 kn-aut-sei=吉田 kn-aut-mei=敦子 aut-affil-num=7 ORCID= affil-num=1 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=2 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=3 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=4 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=5 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=6 en-affil=Graduate School of Environmental and life Science, Okayama University kn-affil=岡山大学大学院環境生命科学研究科 affil-num=7 en-affil=Nozomi Farm Co. kn-affil=(有)のぞみふぁーむ en-keyword=artificial flower induction kn-keyword=artificial flower induction en-keyword=Fragaria x ananassa Duch. kn-keyword=Fragaria x ananassa Duch. en-keyword=low temperature storage kn-keyword=low temperature storage en-keyword=runner cutting kn-keyword=runner cutting END start-ver=1.4 cd-journal=joma no-vol=38 cd-vols= no-issue= article-no= start-page=i end-page=i dt-received= dt-revised= dt-accepted= dt-pub-year=2016 dt-pub=20160401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=序 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=37 cd-vols= no-issue= article-no= start-page=17 end-page=20 dt-received= dt-revised= dt-accepted= dt-pub-year=2015 dt-pub=20150401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=間欠冷蔵処理回数がイチゴ‘女峰’の開花に及ぼす影響 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=安場健一郎 kn-aut-sei=安場 kn-aut-mei=健一郎 aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=田中義行 kn-aut-sei=田中 kn-aut-mei=義行 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター affil-num=2 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター affil-num=3 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター affil-num=4 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター END start-ver=1.4 cd-journal=joma no-vol=37 cd-vols= no-issue= article-no= start-page=9 end-page=16 dt-received= dt-revised= dt-accepted= dt-pub-year=2015 dt-pub=20150401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=挿し苗時期，苗の大きさとクラウンの深さがイチゴ‘さちのか’ の花芽分化と開花に及ぼす影響 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=宮地大介 kn-aut-sei=宮地 kn-aut-mei=大介 aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=田中義行 kn-aut-sei=田中 kn-aut-mei=義行 aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=安場健一郎 kn-aut-sei=安場 kn-aut-mei=健一郎 aut-affil-num=5 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=本村翔 kn-aut-sei=本村 kn-aut-mei=翔 aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター affil-num=2 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター affil-num=3 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター affil-num=4 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター affil-num=5 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター affil-num=6 en-affil= kn-affil=岡山大学大学院自然科学研究科 END start-ver=1.4 cd-journal=joma no-vol=103 cd-vols= no-issue= article-no= start-page=11 end-page=19 dt-received= dt-revised= dt-accepted= dt-pub-year=2014 dt-pub=20140201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Effects of potassium nutrition on fruit development and yield of substrate grown strawberry kn-title=養液栽培イチゴの生育・収量と果実発育に及ぼすカリウム栄養の影響 en-subtitle= kn-subtitle= en-abstract= kn-abstract=　Effect of K nutrition on sugar and organic acid concentration in fruit and yield of strawberry cultivars (Fragaria ×ananassa Duch.; Nyoho, Toyonoka, Sachinoka, Asukarubi, Akihime, Tochiotome, and Sagahonoka) was investigated. Nutrient solution (NO3 8, NH4 1, P 1, K 4, Ca 2, Mg 1, SO4 1 ; mM) was modified to contain 0 to 4mM of K by replacing K with Ca and supplied from the beginning of flowering. K in the drainage decreased to a trace level 3 weeks after the beginning of treatment except for 4mM?K solution. Absorption of NO3 apparently decreased in plants supplied 0mM?K solution, but little difference was observed among the other 3 solutions. K concentration in petiole decreased linearly with decrease in K concentration in solutions, but there was little difference between the concentrations of leaflet of plants supplied with 4 and 2mM?K solutions. No difference was observed in concentrations of sugars and organic acids in fruit in primary inflorescence. In the second inflorescence, organic acids and K concentration in fruit linearly decreased with decrease in K in supplied solutions while sugar concentration of fruit decreased significantly only in plants supplied 0mM?K solution. When 0.5 to 4mM?K solutions were supplied from 2 weeks after planting, marketable fruit yield was smallest in plants supplied 0.5mM?K solution followed, by that supplied 1mM?K solution, and largest in that supplied with 2mM?K solution. Almost all K supplied with 2mM?K solution was absorbed by strawberry plants and no difference was observed in quality and K concentration of fruit, yield and plant growth between the plants supplied with 2 and 4mM?K solutions. It may be suitable to reduce the concentration of K in nutrient solution by half for substrate production of strawberry. en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name=OhmoriToshimasa en-aut-sei=Ohmori en-aut-mei=Toshimasa kn-aut-name=大森敏正 kn-aut-sei=大森 kn-aut-mei=敏正 aut-affil-num=2 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=3 ORCID= en-aut-name=TanakaYoshiyuki en-aut-sei=Tanaka en-aut-mei=Yoshiyuki kn-aut-name=田中義行 kn-aut-sei=田中 kn-aut-mei=義行 aut-affil-num=4 ORCID= en-aut-name=MurakamiKenji en-aut-sei=Murakami en-aut-mei=Kenji kn-aut-name=村上賢治 kn-aut-sei=村上 kn-aut-mei=賢治 aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=農林水産省中国四国農政局 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=石川県立大学生物資源環境学部 en-keyword=Fragaria ×ananassa Duch. kn-keyword=Fragaria ×ananassa Duch. en-keyword=K/Ca ratio kn-keyword=K/Ca ratio en-keyword=organic acids kn-keyword=organic acids en-keyword=sugars kn-keyword=sugars END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year= dt-pub= dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=間欠冷蔵処理によるイチゴの花芽分化促進−処理技術の理論と実際−「新たな農林水産政策を推進する実用技術開発事業22076間欠冷蔵処理によるイチゴの花芽分化促進技術の確立」研究成果概要（間欠冷蔵処理マニュアル） en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=西本登志 kn-aut-sei=西本 kn-aut-mei=登志 aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=松崎朝浩 kn-aut-sei=松崎 kn-aut-mei=朝浩 aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=山崎敬亮 kn-aut-sei=山崎 kn-aut-mei=敬亮 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil= affil-num=3 en-affil= kn-affil= affil-num=4 en-affil= kn-affil= END start-ver=1.4 cd-journal=joma no-vol=102 cd-vols= no-issue= article-no= start-page=29 end-page=34 dt-received= dt-revised= dt-accepted= dt-pub-year=2013 dt-pub=20130201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Effect of Day Length, Supplemental Lighting Strength, Shading Period and Minimum Night Temperature on Occurrence of Abnormal Inflorescence in Gypsophila paniculata ‘Altair’ kn-title=日長，補光強度，遮光時期および最低夜温がシュッコンカスミソウ ‘アルタイル’の形態異常花序発生に及ぼす影響 en-subtitle= kn-subtitle= en-abstract=シュッコンカスミソウ‘アルタイル’の形態異常花序の発生には環境要因が関与していると考えられたので，日長，補光強度，遮光時期および最低夜温が形態異常花序発生に及ぼす影響を調査した．形態異常程度は４種類のパターン (０：正常，１：茎が短いもの，２：２本の茎が癒着，3：ひどく湾曲し変形したもの) に分類し，その影響を受けた小花の割合を求めた．蛍光灯による日長処理（12時間，16時間，20時間，24時間）や白熱灯による日長処理（自然日長，24時間）は形態異常花序発生率に影響を及ぼさなかった．蛍光灯（PPFD 1μmol・m-2・s-1），白熱灯（PPFD 3μmol・m-2・s-1），メタルハライドランプ（PPFD 14μmol・m-2・s-1），高圧ナトリウムランプ（PPFD 48μmol・m-2・s-1）を用いて16時間の補光を行った．異なる光源による光強度でも形態異常発生率に一定の傾向は認められなかった．遮光時期を変えても形態異常発生率に一定の傾向は認められなかった． 最低夜温を15℃に上げると８℃区と比較して15℃区の形態異常発生は大きく減少した．特にパターン２と３の発生率は大幅に低下した．各実験の処理開始から発蕾までの平均夜温（7.1℃，9.0℃，9.2℃，11.6℃，16.4℃）と，パターン３の形態異常発生率（13.1%，8.7%，7.1%，1.1%，0.7%）との間に高い負の相関（R2＝0.849）が認められ，処理開始から発蕾までの平均夜温が高いほど形態異常発生率は低下した．以上のことから，形態異常花序発生には夜間の温度が大きく関与しているのではないかと推察された． kn-abstract=As occurrence of abnormal inflorescence in Gypsophila paniculata ‘Altair’ is caused by environmental conditions, effects of day length, supplemental lighting strength, shading period and minimum night temperature on occurrence of abnormal inflorescence were investigated. Abnormal inflorescence was classified into four types : normal, pattern 1 (Short-flower stalk), pattern 2 (Coalescent two-flower stalk) and pattern 3 (Looping and irregular-flower stalk). Neither of 12h, 16h, 20h or 24h day length by fluorescent lamp, nor 24h by incandescent lamp affected occurrence of abnormal inflorescence. Effects of four levels of light intensity (fluorescent lamp : PPFD 1μmol・m?2・s?1, incandescent lamp : PPFD 3μmol・m?2・s?1, metal halide lamp : PPFD 14μmol・m?2・s?1 and high-pressure sodium lamp : PPFD 48μmol・m?2・s?1) were examined in 16h photoperiod. Occurrence of abnormal inflorescence was not affected by different light intensities, neither was it affected by shading period. Occurrence of abnormal inflorescence at 15°C was however significantly reduced compared to that at 8°C. In particular, patterns 2 and 3 at 15°C were significantly reduced compared to those at 8°C. There was a strong negative correlation between average night temperature from starting the treatment to flower budding (7.1°C, 9.0°C, 9.2°C, 11.6°C and 16.4°C) and incidence of pattern 3 (13.1%, 8.7%, 7.1%, 1.1% and 0.7%). Therefore, as average night temperature increased, occurrence of abnormal inflorescence decreased. The results show that low night temperature may be the main factor inducing occurrence of abnormal inflorescence. en-copyright= kn-copyright= en-aut-name=YamaguchiNorihito en-aut-sei=Yamaguchi en-aut-mei=Norihito kn-aut-name=山口訓史 kn-aut-sei=山口 kn-aut-mei=訓史 aut-affil-num=1 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=2 ORCID= en-aut-name=KobikiKayoko en-aut-sei=Kobiki en-aut-mei=Kayoko kn-aut-name=小日置佳世子 kn-aut-sei=小日置 kn-aut-mei=佳世子 aut-affil-num=3 ORCID= en-aut-name=OtaniShoko en-aut-sei=Otani en-aut-mei=Shoko kn-aut-name=大谷翔子 kn-aut-sei=大谷 kn-aut-mei=翔子 aut-affil-num=4 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil= affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil= affil-num=4 en-affil= kn-affil= affil-num=5 en-affil= kn-affil=岡山大学 en-keyword=abnormal inflorescence pattern kn-keyword=abnormal inflorescence pattern en-keyword=cut flower form kn-keyword=cut flower form en-keyword=environmental factor kn-keyword=environmental factor en-keyword=incidence of abnormal inflorescence kn-keyword=incidence of abnormal inflorescence en-keyword=low night temperature kn-keyword=low night temperature END start-ver=1.4 cd-journal=joma no-vol=102 cd-vols= no-issue= article-no= start-page=21 end-page=28 dt-received= dt-revised= dt-accepted= dt-pub-year=2013 dt-pub=20130201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Incidence of Blossom-end Rot in Relation to Water-soluble Ca Concentration in Tomato Fruits as Affected by Ca Nutrition under Root Restriction kn-title=培養液中Ca濃度が根域制限栽培したトマト果実の 水溶性Ca濃度と尻腐れ果発生に及ぼす影響 en-subtitle= kn-subtitle= en-abstract=根域制限下におけるトマトの養分吸収を調査した結果，培養液中Caの多くは排液とともに排出され，Ｎに対するCaの吸収比率は園試処方やHoagland処方中の比率の50%以下であった．そこで，園試処方培養液中のCa(NO3)2･4H2Oの一部をNH4NO3に置換してCa濃度１，２，４ﾋの培養液を作成し，日射比例給液制御下で ‘ハウス桃太郎’の根城制限栽培（培地容量250，500 ?）を行った．培養液のCa濃度が１ﾋであっても排液中のCa濃度が２ﾋよりも高く推移したが，Ca吸収量は極めて少なく，著しいCa欠乏症状が現れた．低Ca濃度区では尻腐れ果が多発し，１ﾋ区では第３果房より上段の果実は全て尻腐れ果となり，第９果房までの収量は２ﾋ区，１ﾋ区でそれぞれ４ﾋ区の50%，36%に低下した．腋芽茎中のCa濃度の低下は0.6N-NaCl可溶性画分や0.6N-HCl可溶性画分と比較して水溶性画分の低下が著しかった．そこで，Ca濃度が１〜４ﾋの培養液を用いて点滴栽培を行い，果実中のCa濃度を分画して定量した．果実頂部のCa濃度はいずれの画分においても培養液中Ca濃度が低いほど低く，開花から尻腐れ症状が発生するまでの日数も短くなった．尻腐れ果発生率と果頂部の水溶性Ca濃度との間にのみ有意な負の相関が認められた．以上のことから，果実の水溶性Ca濃度がトマトの尻腐れ果発生リスクの大小に大きくかかわっており，植物体の水溶性Ca濃度測定は尻腐れ果発生防止のためのCa栄養診断に応用できる可能性が高いと考えられる． kn-abstract=The rate of absorbed Ca to N was less than half of Enshi or Hoagland solution in tomato (Solanum lycopersicum Mill.) grown with restricted root zone volume in previous experiments. Tomato plants were grown in plastic pots containing 250 or 500ml of peat based medium with modified Enshi solutions containing 1, 2 or 4mM of Ca. The solutions were prepared by replacing a part of Ca(NO3)2・4H2O to NH4NO3. Although Ca concentration was higher than 2mM in drainage collected from plants supplied 1mM Ca solution, absorbed amount of Ca was very small and severe symptom of Ca deficiency was observed. Incidence of blossom-end rot (BER) increased with decrease in Ca concentration of the solution and yield decreased to 50% and 36% of 4mM control, in 2mM and 1mM plots, respectively. Among fractionated Ca in stem of lateral shoot, decrease in water-soluble fraction was remarkable compared to 1N NaCl- or 0.6N HCl-soluble fractions. Tomato plants were then grown with modified solutions containing 1~4mM of Ca and fractionated Ca was determined for distal half of fruits. With decrease in solution Ca, fruit Ca decreased in all fractions, and days to BER incidence after flowering also decreased. Significant relationship was found only between the water-soluble Ca concentration in fruit tissue and rate of BER incidence. Thus water-soluble Ca in tomato fruit may closely relate to BER incidence, and an efficient tool to estimate the potential risk of BER may possibly be developed by determining the Ca fraction in the stem of lateral shoots. en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name=ShingaiAya en-aut-sei=Shingai en-aut-mei=Aya kn-aut-name=新開礼 kn-aut-sei=新開 kn-aut-mei=礼 aut-affil-num=2 ORCID= en-aut-name=OoyamaMitsuo en-aut-sei=Ooyama en-aut-mei=Mitsuo kn-aut-name=大山光男 kn-aut-sei=大山 kn-aut-mei=光男 aut-affil-num=3 ORCID= en-aut-name=MurakamiKenji en-aut-sei=Murakami en-aut-mei=Kenji kn-aut-name=村上賢治 kn-aut-sei=村上 kn-aut-mei=賢治 aut-affil-num=4 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil= affil-num=3 en-affil= kn-affil= affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=岡山大学 en-keyword=BER kn-keyword=BER en-keyword=Ca absorption kn-keyword=Ca absorption en-keyword=Ca fractions kn-keyword=Ca fractions en-keyword=dripfertigation kn-keyword=dripfertigation en-keyword=Enshi solution kn-keyword=Enshi solution END start-ver=1.4 cd-journal=joma no-vol=102 cd-vols= no-issue= article-no= start-page=15 end-page=20 dt-received= dt-revised= dt-accepted= dt-pub-year=2013 dt-pub=20130201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Effect of Supplied Amount and Strength of Nutrient Solution on Growth, Yield, and Fruit Quality of Strawberry ‘Saga-honoka’ Grown with Sufficiently Elevated CO2 kn-title=培養液濃度と施用量が高CO2濃度条件下で育てたイチゴ‘さがほのか’の生育・収量と果実品質に及ぼす影響 en-subtitle= kn-subtitle= en-abstract=イチゴ‘さがほのか’を用いて，高CO2濃度条件下(日中800〜2500ppm)での栽培における培養液濃度と施用量の影響について検討した．培養液は排液率20%を目標に，大塚Ａ処方を30〜50%濃度で適宜変更する慣行区を標準として，濃度をその1.2倍，0.8倍とする高濃度区と低濃度区，さらに低濃度区においては，給液量を1.2倍(排液率35%)とする低濃度多量区を設け，計４処理区とした．排液率20%を目標とした低濃度培養液管理では，12月以降の排液中NO3-Nは検出限界以下であり，栽培期間を通して養分が不足しがちであった．また，全Ｎ施用量も他の３処理区と比較すると少なくなり，１月以降の葉面積が小さくなった．収量・果実品質においては処理区間で有意な差は認められなかったが，チップバーン発生率は，高濃度区で高く，低濃度多量区の発生率が最も低かった．低濃度多量区では，葉面積も大きくなったことから，‘さがほのか’においては，排液率30〜40%，排液EC50〜60mS・m-1を目標とした低濃度での培養液管理が望ましいといえる． kn-abstract=The effects of supplied amount and strength of nutrient solution were investigated for strawberry (Fragaria×ananassa Duch. cv. Saga-honoka) grown with peat bags in elevated CO2 environment (800-2500 ppm in the day time, November 4 to April 7). Three strengths (L : low-80%, M : standard-100% and H : high-120%) of nutrient solution (N : 8.85, P : 0.85, K : 3.90, Ca : 2.05, Mg : 0.93 mM ; half strength of Ohtsuka A solution) were compared. Around 20% of discharged rate (discharged/supplied amount of nutrient solution) was kept for these 3 plots and 30 to 40% of the rate was kept for additional plot of 80%-solution (L2) by altering the supplied amount of 80%-solution. As almost no nitrate could be detected in drainage of L, nutrient supply was probably insufficient throughout the experiment. Total amount of nitrogen supply was lower than the other 3 plots and leaf area was the smallest after December. Although there was no significant difference in yield and fruit quality, the rate of tip burn affected flowers was lowest in L2 and highest in H. Thus, around 30-40% of drainage rate and 50-60 mS・m?1 of drainage EC may be desirable target values for ‘Saga-honoka’ strawberry grown with peat based substrate. en-copyright= kn-copyright= en-aut-name=InazumiDaichi en-aut-sei=Inazumi en-aut-mei=Daichi kn-aut-name=稲角大地 kn-aut-sei=稲角 kn-aut-mei=大地 aut-affil-num=1 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=2 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=3 ORCID= en-aut-name=MurakamiKenji en-aut-sei=Murakami en-aut-mei=Kenji kn-aut-name=村上賢治 kn-aut-sei=村上 kn-aut-mei=賢治 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil= affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=nutrient absorption kn-keyword=nutrient absorption en-keyword=tipburn kn-keyword=tipburn en-keyword=titratable acid kn-keyword=titratable acid en-keyword=total soluble solid kn-keyword=total soluble solid END start-ver=1.4 cd-journal=joma no-vol=33 cd-vols= no-issue= article-no= start-page=i end-page=i dt-received= dt-revised= dt-accepted= dt-pub-year=2011 dt-pub=20110401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=序 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター END start-ver=1.4 cd-journal=joma no-vol=100 cd-vols= no-issue= article-no= start-page=17 end-page=23 dt-received= dt-revised= dt-accepted= dt-pub-year=2011 dt-pub=20110201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Growth and Yield of Substrate-Cultured Strawberry as Affected by Root Zone Volume and Fertigation Frequency kn-title=ピート栽培における培地量と給液制御方法がイチゴの生育と 収量に及ぼす影響 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Effects of root-zone volume and fertigation frequency on 4 cultivars of substrate-grown strawberry (Fragaria×ananassa Duch., ‘Nyoho’, ‘Asukarubi’, ‘Akihime’ and ‘Tochiotome’) were investigated. Fertigation frequency had no significant effect on growth and yield of strawberry even in the minimum root-zone volume of 0.6L/plant. Total yield, mean berry weight, and root dry weight at end of harvest decreased with decrease in volume, but no significant difference was observed in number of harvested berries and subsequent growth of runners and daughter plants. In the yield and root growth, there were large differences between peat bags (2.25L/plant) and bowl-shaped containers (0.6-1.5L/plant), and highly significant non-linear regressions between the two parameters and the root-zone volume. The differences may be caused by factors other than the volume, such as the shape of root-zone and edge of containers or drain property, and so on. en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name=HiroseYasuhisa en-aut-sei=Hirose en-aut-mei=Yasuhisa kn-aut-name=廣瀬泰久 kn-aut-sei=廣瀬 kn-aut-mei=泰久 aut-affil-num=2 ORCID= en-aut-name=MorimotoYukari en-aut-sei=Morimoto en-aut-mei=Yukari kn-aut-name=森本由香里 kn-aut-sei=森本 kn-aut-mei=由香里 aut-affil-num=3 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=応用植物科学コース affil-num=2 en-affil= kn-affil=応用植物科学コース affil-num=3 en-affil= kn-affil=応用植物科学コース affil-num=4 en-affil= kn-affil=応用植物科学コース en-keyword=Fragaria×ananassa kn-keyword=Fragaria×ananassa en-keyword=root kn-keyword=root en-keyword=runner kn-keyword=runner en-keyword=solar radiation kn-keyword=solar radiation en-keyword=water absorption kn-keyword=water absorption END start-ver=1.4 cd-journal=joma no-vol=32 cd-vols= no-issue= article-no= start-page=15 end-page=19 dt-received= dt-revised= dt-accepted= dt-pub-year=2010 dt-pub=20100401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=培養液濃度が根域制限−日射比例給液栽培トマトの生育・収量と果実品質に及ぼす影響 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=松野大樹 kn-aut-sei=松野 kn-aut-mei=大樹 aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=高田圭太 kn-aut-sei=高田 kn-aut-mei=圭太 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学大学院自然科学研究科 affil-num=2 en-affil= kn-affil=岡山大学大学院自然科学研究科 affil-num=3 en-affil= kn-affil=岡山大学大学院自然科学研究科 affil-num=4 en-affil= kn-affil=岡山大学農学部附属農場 END start-ver=1.4 cd-journal=joma no-vol=32 cd-vols= no-issue= article-no= start-page=9 end-page=14 dt-received= dt-revised= dt-accepted= dt-pub-year=2010 dt-pub=20100401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=根域制限栽培におけるトマト品種の生育・収量と果実品質 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=松野大樹 kn-aut-sei=松野 kn-aut-mei=大樹 aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=高田圭太 kn-aut-sei=高田 kn-aut-mei=圭太 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学大学院自然科学研究科 affil-num=2 en-affil= kn-affil=岡山大学大学院自然科学研究科 affil-num=3 en-affil= kn-affil=岡山大学大学院自然科学研究科 affil-num=4 en-affil= kn-affil=岡山大学農学部附属農場 END start-ver=1.4 cd-journal=joma no-vol=32 cd-vols= no-issue= article-no= start-page=i end-page=i dt-received= dt-revised= dt-accepted= dt-pub-year=2010 dt-pub=20100401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=序 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学農学部附属山陽圏フィールド科学センター END start-ver=1.4 cd-journal=joma no-vol=99 cd-vols= no-issue=1 article-no= start-page=49 end-page=53 dt-received= dt-revised= dt-accepted= dt-pub-year=2010 dt-pub=20100201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Flower Bud Differentiation and Flowering of Tray Grown Strawberry 'Nyoho' as Affected by Plant age and the Duration of Nutrient Starvation kn-title=トレイ育苗したイチゴ‘女峰’の花芽分化と開花に及ぼす挿し苗時期と施肥中断時期の影響 en-subtitle= kn-subtitle= en-abstract=イチゴでは，根域容量130mL程度のセルトレイを利用した挿し苗育苗が省力育苗技術として急速に普及している．そこで，‘女峰’を用いて挿し苗時期と施肥中断時期が花芽分化と開花に及ぼす影響について検討した．挿し苗は7月中下旬が適期であり，6月や8月挿し苗区より花芽分化と開花が早く，極端に遅れる株が少なかった．液肥を用いて約6r-N/株・週の割合で与えた場合，施肥中断時期は8月末が最も優れ，週間早いと定植前の肥料不足によって極端に開花の遅れる株が増加し，1週間遅れると高窒素による花芽分化抑制が認められた． kn-abstract=In the forcing production of strawberry Fragaria × ananassa Duch., the use of tray plants grown from cuttings of runner tips is becoming popular with the increase in strawberry production with substrate culture systems, due to their lower cost and ease of plant management compared to conventional pot-grown plants. Effects of the date of runner cutting and the duration of nutrient starvation on flower bud differentiation and flowering of tray grown plants of strawberry 'Nyoho' were investigated. Plants cut on mid or late July and rooted on cell trays performed early and uniform flower bud differentiation and flowering compared to June or August cut plants. When the plants were supplied nutrient solution containing ca. 6 mg-N/plant/week, nutrient starvation from the end of August led to the early and uniform flowering of tray plants, outperforming the earlier or later starvation. en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name=MorimotoYukari en-aut-sei=Morimoto en-aut-mei=Yukari kn-aut-name=森本由香里 kn-aut-sei=森本 kn-aut-mei=由香里 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 en-keyword=forcing kn-keyword=forcing en-keyword=Fragaria×ananassa Duch. kn-keyword=Fragaria×ananassa Duch. en-keyword=nutrient solution kn-keyword=nutrient solution en-keyword=runner cutting kn-keyword=runner cutting END start-ver=1.4 cd-journal=joma no-vol=30 cd-vols= no-issue= article-no= start-page=i end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=20080401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=序 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=YoshidaYuuichi en-aut-sei=Yoshida en-aut-mei=Yuuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=31 cd-vols= no-issue= article-no= start-page=i end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=20090401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=序 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=YoshidaYuuichi en-aut-sei=Yoshida en-aut-mei=Yuuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=88 cd-vols= no-issue=1 article-no= start-page=39 end-page=45 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=199902 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Changes in Pollen Fertility of 'Nyoho' Strawberry in Relation to Light Intensity, Temperature and Leaf Carbohydrate and Mineral Concentration kn-title=イチゴ’女峰’花粉稔性の変化と日射量、気温並びに体内炭水化物、無機養分濃度との関係 en-subtitle= kn-subtitle= en-abstract=促成栽培したイチゴ’女峰’の’成り疲れ’と同時に発生する受精不良による奇形果発生要因を明らかにするため、イチゴ生産者の15棟のビニルハウスの花粉稔性の変化を調査し、気象要因、葉中無機養分および炭水化物濃度との関係について解析した。花粉稔性は、気温、日射量が低下し、着果負担が増大する1,2月に急激に低下したことから、奇形果発生の原因が花粉稔性の低下にあることが示された。花粉稔性と開花前1〜3日の日射量、当日の戸外の最低気温、葉中炭水化物濃度との間に高い相関が認められなかった。CO2施肥によって腋果房収穫開始期（1月）の花粉稔性が高まったことから、低日射と過重な着果負担による光合成産物不足が花粉稔性低下の大きな原因であると考えられた。 kn-abstract=Changes in pollen fertility in forcing strawberry cv. Nyoho(Fragaria×ananassa Duch.)were investigated to clarify the factors affecting fruit malformation caused by poor fertilization which occurs with plant dwarfing and yeild decreace in February to March .Pollen were sampled from 15 greenhouses of strawberry growers,and relationships between pollen germination and climatic factors,mineral and carbohydrate concentration in leaves were analyzed.Pollen fertility decreased in January and February with decrease in light intensity and outside air temprerature,and increace in fruit load.It was suggested that the occurrence of fruit malfomation may be mainly caused by the decrease in pollen fetillity. There were highly significant relationships between the pollen fertility and light intensity in 1 to 3 days before anthesis,minimum outside air temperature on the day of anthesis,and carbohyrates,P,K and Ca concentration in the leaves.No constant relationship could be found between polln fertility and leaf N concentration.Pollen fertility at the beginning of harvest for second inflorescence(January)was improved with CO2 enrichment.These results indicate that the poor pollen development may result from the shortage of photosynthate caused by low light and fruit load. en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name=TanimotoKeiichiro en-aut-sei=Tanimoto en-aut-mei=Keiichiro kn-aut-name=谷本圭一郎 kn-aut-sei=谷本 kn-aut-mei=圭一郎 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=香川大学農学部 en-keyword=Fragaria×ananassa Duch. kn-keyword=Fragaria×ananassa Duch. en-keyword=pollen kn-keyword=pollen en-keyword=light energy kn-keyword=light energy en-keyword=nitorogen nutrition kn-keyword=nitorogen nutrition en-keyword=CO2 enrichment kn-keyword=CO2 enrichment END start-ver=1.4 cd-journal=joma no-vol=92 cd-vols= no-issue=1 article-no= start-page=31 end-page=37 dt-received= dt-revised= dt-accepted= dt-pub-year=2003 dt-pub=200302 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Nutrient and Water Uptake, Growth and Yield of Substrate Cultured Strawberry cv. Nyoho with Solar-Mediated Fertigation Control kn-title=日射比例給液制御によってビート栽培したイチゴ’女峰’の生育，収量と養水分吸収 en-subtitle= kn-subtitle= en-abstract=ピートモスを主体とする培地で養液栽培したイチゴ‘女峰’の生育，収量と養水分吸収について，液量30〜50ml/株/日を目標として毎回の給液量を一定の値（24.6〜77.6ml/株）に設定し，点滴給液した固定区を対照とし，給液量（ｙ：ml/株）を前回の給液からの積算日射量（ｘ：kW・hr/u）に基づいて変動させて点滴給液する［ｙ＝(24ｘ＋17.5)ｃ，ｃ：0.7〜2.0］日射比例制御区（比例区）との比較を行った．生育，収量については処理区間にほとんど差が認められず，養分の総吸収量にも大きな差は認められなかった．しかし，対照区と比較して比例区では，養水分の利用効率が高く，排液とともに排出される養分が少なかったことから，日射比例給液制御によって環境に対する負荷を小さくできることが明らかになった．イチゴの蒸発散速度と日射量との間の関係は季節によって異なり，葉面積が大きくなる４月以降は回帰式の傾きが大きくなった．また，排液が少ない場合には排液のECが施与した培養液の1.5倍以上と著しく高くなったが，排液率（給液量/液量）が15%，あるいは排液量が30ml/株/日以上の場合には，排液のECと排液中養分濃度が安定した値を示した．これらのことから，イチゴを固形培地で養液栽培する場合には，葉面積やハウス内環境条件の季節的な変動による蒸発散速度の変化に合わせて，排液率が15〜20%となるように日射比例給液制御の設定値を変更することが望ましいと考えられた． kn-abstract=Nutrient and water uptake, growth and yield of strawberry (Fagaria × ananassa Duch. cv. Nyoho) grown in peat-based substrate with contralled fertigation corresponding to solar radiation (SR) were composed with that of time-scheduled fertigation (TS). Amount of nutrient solution for each treatment was changed seasonally to keep the amount of drainage as 30-50ml/plant/day. The amount of each fertigation (y, ml/plant; 4 times a day) was automatically controlled with the following equation in SR; y= (24x + 17.5) c, where x: comulative solar radiation after the previous fertigation (kW ・hr/m2) and c:0.7-2.0 (factor changed seasonally according to the aomunt of drainage), while the amount was set as 24.6 -77.6ml/plant (4 times a day) in TS. There was little difference between the two fertigation systems in growth, yield and the amount of absorbed nutrients. However, nutrients and water were absorbed more efficiently and nutrients were discharged with drainage less in SR than in TS. Relationship between water consumption and solar radiation varied seasonally, in which the slope of the regression was larger in April and May compared to before March. EC value of the drainage increased to 1.5 times or more of applied solution when the amount of drainage was small, but the EC and concentration of nutrients in the drainage varied little when discharge rate (amount of drainage / supplied solution) was larger than 15% or drainage was more than 30ml/plant/day. When strawberries are grown with substrate, optimum value of the discharge rate may be 15 to 20%. To maintain this value, the factors of a controlling device for solar-mediated fertigation should be changed in a timely manner depending on the seasonal changes in evapotranspiration rate affected by leaf area of plants and/or environmental conditions in a greenhouse. en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name=NakaiKeisuke en-aut-sei=Nakai en-aut-mei=Keisuke kn-aut-name=中井啓介 kn-aut-sei=中井 kn-aut-mei=啓介 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=香川大学農学部 en-keyword=fertigation control kn-keyword=fertigation control en-keyword=nutient uptake kn-keyword=nutient uptake en-keyword=solar radiation kn-keyword=solar radiation en-keyword=strawberry kn-keyword=strawberry en-keyword=substrate culture kn-keyword=substrate culture END start-ver=1.4 cd-journal=joma no-vol=92 cd-vols= no-issue=1 article-no= start-page=27 end-page=30 dt-received= dt-revised= dt-accepted= dt-pub-year=2003 dt-pub=200302 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Relationships between Plant Size and Amount of Overhead Irrigation Required for Uniform Water Supply to Individual Cell Medium kn-title=セル培地に必要な散水量と植物体の大きさの関係 en-subtitle= kn-subtitle= en-abstract=セル育苗における灌水方法として用いられている頭上散水法の問題点を明らかにするため，実際の苗生産施設において，ブーム式の頭上散水装置による育苗ベンチ内の散水むらを調べた．また，苗齢（23，42日齢区）の異なるストックセル苗に散水ノズルによって散水（１/２セルトレイあたり０，150，300，450）した場合のセルごとの水分吸収量の変動を調べた．ブーム式の頭上散水装置による散水量は，ノズルからの散水の重なり程度によって大きく異なり，散水量の最大値は最小値の約２倍であった．ブームの中央部においても散水量にばらつきがみられ，最大30%程度異なった．均一な散水を行った場合であっても，セルで植物が生育している場合には，散水量が少ないほどセルあたりの灌水量の変動が大きくなった．また，植物体（葉面積）が大きいほど，変動が大きくなった．以上のことから，頭上散水法ですべてのセルに必要量散水するには，蒸発散量の２倍以上の散水が必要と推定され，セル育苗の灌水自動化にあたっては，灌水の均一化，養水分の利用効率の面から，頭上散水法より底面給水法を採用することが望ましいと考えられた． kn-abstract=In order to clarify the problems with overhead irrigation systems for cell transplant production, uniformity of water supply by a boom spraying system was investigated. Furthermore, uneven water soaking into individual cell medium caused by plant cover growing in such cells was investigated. The amount of water supply from a boom spraying system varied considerable with the arrangement of the nozzles. Although a larger number of nozzles was set on the boom, the maximum amount of supplied water in the central part of the boom was about twice as much as that at each end of the boom. When no plant was grown in the cells, uniform water supply to individual cell mudium was obtained by a downright sprinkler system. However, when stock (Matthiola incana R. Br.) plants were grown in cells, variation in the amount of water soaking into the medium increased noticeably with increase in the plant size growing in the cells and with a decrease in the amount of supplied water. Plant covers with overlapped leaves may disturb the uniformity in the amount of water soaked into individual cell medium. As twice the water consumption may be required for uniform water supply into individual cell medium with an overhead irrigation system, a subirrigation system may be desirable for economical and ecological automatic irrigation to produce cell transplants on a large scale. en-copyright= kn-copyright= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=1 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 en-keyword=automatic irrigation kn-keyword=automatic irrigation en-keyword=boom spraying kn-keyword=boom spraying en-keyword=cell transplant production kn-keyword=cell transplant production en-keyword=overlapped leaves kn-keyword=overlapped leaves en-keyword=uneven water soaking kn-keyword=uneven water soaking END start-ver=1.4 cd-journal=joma no-vol=96 cd-vols= no-issue=1 article-no= start-page=37 end-page=42 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200702 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Growth, Yield and Fruit Quality of Tomato as Affected by Root Zone Restriction in Combination with Solar-mediated Fertigation Regime kn-title=根域容量と日射比例給液制御による給液量がトマトの生育・収量と果実品質に及ぼす影響 en-subtitle= kn-subtitle= en-abstract= kn-abstract=　Plant growth and fruit development of tomato (Lycopersicon esculentum Mill. cv. House Momotaro) grown in different sized plastic pots (root zone volume, RZV, of 250, 500, 1,000 mL/plant) in combination with high or low rate of drip fertigation (HF and LF) were investigated. In the February-sown experiment, the plants were fertigated with standard to half strength of Ohtsuka-A solution in proportion to solar radiation keeping the ratio of drainage to supplied solution as 10 to 20ｵ, in 500mL- and 250mL-RZV for HF and LF, respectively. Stem and leaf growth decreased with decrease in RZV and the fertigation rate. The decreases were not significant in the distal plant part lower than the 4th inflorescence. The average fruit weight was greater in HF than LF and increased with increase in RZV only for HF. The incidence of blossom-end rot (BER) was more frequent in HF compared to LF and increased with increase in RZV only for LF. Consequently, fruit yield increased with increase in RZV for HF, but it decreased with increase in RZV for LF. Total soluble solid content (TSS) was significantly higher in LF than in HF and increased with decrease in RZV. Qualified fruits, called ‘fruit tomato’ having 8ｵ of TSS or higher, were obtained with 250 to 500mL of RZV in the successive October-sown experiment where the standard solution was supplied throughout. For ‘fruit tomato’ production with a substrate culture system, root zone restriction, in combination with solar-mediated fertigation control, can be a useful and stable stress factor, reducing shoot and fruit growth, but inducing fruit sugar accumulation and reducing BER incidence simultaneously. en-copyright= kn-copyright= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=1 ORCID= en-aut-name=MatsunoTaiki en-aut-sei=Matsuno en-aut-mei=Taiki kn-aut-name=松野太樹 kn-aut-sei=松野 kn-aut-mei=太樹 aut-affil-num=2 ORCID= en-aut-name=ShingaiAya en-aut-sei=Shingai en-aut-mei=Aya kn-aut-name=新開礼 kn-aut-sei=新開 kn-aut-mei=礼 aut-affil-num=3 ORCID= en-aut-name=GotoTanjuro en-aut-sei=Goto en-aut-mei=Tanjuro kn-aut-name=後藤丹十郎 kn-aut-sei=後藤 kn-aut-mei=丹十郎 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=blossom-end rot kn-keyword=blossom-end rot en-keyword=drip fertigation kn-keyword=drip fertigation en-keyword=fruit tomato kn-keyword=fruit tomato en-keyword=Lycopersicon esculentum Mill kn-keyword=Lycopersicon esculentum Mill END start-ver=1.4 cd-journal=joma no-vol=95 cd-vols= no-issue=1 article-no= start-page=21 end-page=28 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=200602 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=ホウレンソウ雌性間性株における突然変異誘発ならびに低シュウ酸個体の選抜 kn-title=Mutagenesis in Gynomonoecious Spinach (Spinacia oleracea L.) Plants and Selection of Low Oxalate Variants en-subtitle= kn-subtitle= en-abstract=本実験では，ホウレンソウ雌性間性株における突然変異誘発ならびに低シュウ酸個体の選抜を試みた．種子照射の変異原としては，γ線と220MeV 12C kn-abstract=This study was conducted to evalute mutagenesis in gynomonoecious spinach (Spinacia oleracea L.) plants for inducing low oxalate variants.Gamma-ray and ion beams of 220 MeV12C5+ and 50MeV 4He2+ ware used as mutagen in seed irradiation. Optimum dosages for irradiation were determined to be about 100Gy, 15-20Gy and 150-200Gy in gamma-ray, 12C5+ and 4He2+, respectively. In M2 generation, there was one line segregating albino seedlings, one line segregating xantha seedlings and two lines segregating dioesious spinach. To save on labor and time for analysis, selection of low oxalate variants in M2generation was conducted by a two-step selebtion which consisted of the first snalysis of bulked leaves from 2 plants as one specimen followed by the second analysis of selected individual plants. In the first analysis of 813 specimens, we selected 13 specimens as low and 9 specimens as high in oxalate content. In the second analysus, there was consistency in the distribution of low and high oxalate content corresponding to the first screening, indicating that selebtion of low oxalate variants could be achived by this two-step selebtion with half the labor and time for analysis as compares to non-bulked method. There were no clear differences in distribution of oxalate content between M3progenies of plants selected as low or high oxalate content, suggesting that the low oxalate content in plants isolated in M2generation was not of a genetic origin. From these results, it seems to be necessary to explore a variant with obvious deviation from the bontinuous variation of oxalate content in the M 2 generation. en-copyright= kn-copyright= en-aut-name=HataNaoki en-aut-sei=Hata en-aut-mei=Naoki kn-aut-name=畑直樹 kn-aut-sei=畑 kn-aut-mei=直樹 aut-affil-num=1 ORCID= en-aut-name=MurakamiKenji en-aut-sei=Murakami en-aut-mei=Kenji kn-aut-name=村上賢治 kn-aut-sei=村上 kn-aut-mei=賢治 aut-affil-num=2 ORCID= en-aut-name=YoshidaYuichi en-aut-sei=Yoshida en-aut-mei=Yuichi kn-aut-name=吉田裕一 kn-aut-sei=吉田 kn-aut-mei=裕一 aut-affil-num=3 ORCID= en-aut-name=MasudaMasaharu en-aut-sei=Masuda en-aut-mei=Masaharu kn-aut-name=桝田正治 kn-aut-sei=桝田 kn-aut-mei=正治 aut-affil-num=4 ORCID= en-aut-name=TanakaAtsushi en-aut-sei=Tanaka en-aut-mei=Atsushi kn-aut-name=田中淳 kn-aut-sei=田中 kn-aut-mei=淳 aut-affil-num=5 ORCID= en-aut-name=ShikazonoNaoya en-aut-sei=Shikazono en-aut-mei=Naoya kn-aut-name=鹿園直哉 kn-aut-sei=鹿園 kn-aut-mei=直哉 aut-affil-num=6 ORCID= en-aut-name=HaseYoshihiro en-aut-sei=Hase en-aut-mei=Yoshihiro kn-aut-name=長谷純宏 kn-aut-sei=長谷 kn-aut-mei=純宏 aut-affil-num=7 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=Radiation-Applied Biology Division, JAEA affil-num=6 en-affil= kn-affil=Radiation-Applied Biology Division, JAEA affil-num=7 en-affil= kn-affil=Radiation-Applied Biology Division, JAEA en-keyword=gamma-ray kn-keyword=gamma-ray en-keyword=ion beam kn-keyword=ion beam en-keyword=low oxalate kn-keyword=low oxalate en-keyword=mutation breeding kn-keyword=mutation breeding en-keyword=screening kn-keyword=screening END