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ID 49160
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Title Alternative
Effect of Lighting Using Yellow LEDs Designed for Moth Control on Flowering Response of Chrysanthemum
Author
Ishikura, Satoshi
Kajihara, Shinji
Fukushima, Keigo
Abstract
In order to develop a single light source which can be used both for moth control and flower inhibition in chrysanthemum, effects of blue (463nm), green (519nm), yellow green (576nm), yellow (597nm) and red light (646nm) LEDs on the flowering and the cut flower characteristics of chrysanthemum were investigated. As irradiance increased, the days to flower budding increased except under blue light. Yellow green and yellow LED had flower inhibiting effect equivalent to red LED. There was no difference in the crown bud number and the occurrence of abnormal flower irrespective of the light quality and irradiance. Next the, effects of night break and continuous lighting treatment by yellow LED on the flowering and cut flower characteristics of the chrysanthemum were investigated. There were significant differences in the cut flower characteristics except for the blade number on the neck in these treatments ; there was no practical problem with night break or continuous lighting. The minimum irradiance strength enough for flower inhibition in the continuous lighting treatment was about 80 mW m−2 that was half in night break treatment. Therefore, it is considered that yellow LED can be used as single light source for both moth control and flower inhibition in chrysanthemum.
Abstract Alternative
キクの防蛾と開花抑制に両用できる単一の光源を開発するために,青(ピーク波長:463nm),緑(519nm),黄緑(576nm),黄(597nm)および赤色(646nm)LED光が開花および切り花形質に及ぼす影響を調査した.青色光を除いて,放射照度が大きいほど発蕾までの日数が大きくなった.黄緑および黄色光は,赤色光とほぼ同等の開花抑制作用を有していた.いずれの光質および放射照度に関わらず,やなぎ葉数や花弁の展開異常の発生に差は見られなかった.次に,黄色LED光による暗期中断と終夜照明による影響を調査した.暗期中断と終夜照明では,やなぎ葉数を除く切り花形質に有意な差が見られたが,実用上の問題はなかった.開花抑制に必要となる放射照度の下限値は,終夜照明では約80mW m-2であり,暗期中断のほぼ半分であった.以上のことから,黄色LED光は,単一の光源としてキクの防蛾と開花抑制に両用することが可能であった.
Keywords
illuminated culture
light-emitting diode
long day treatment
regulation of flowering
spectral quality of light
Note
原著論文 (Original paper)
Published Date
2013-02-01
Publication Title
岡山大学農学部学術報告
Publication Title Alternative
Scientific Reports of the Faculty of Agriculture Okayama University
Volume
volume102
Publisher
岡山大学農学部
Publisher Alternative
Faculty of Agriculture, Okayama University
Start Page
35
End Page
41
ISSN
2186-7755
Content Type
Departmental Bulletin Paper
language
日本語
File Version
publisher
Refereed
False
Eprints Journal Name
srfa