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ID 85
Eprint ID
85
フルテキストURL
タイトル(別表記)
Milk-Secretion Studies with Corriedale Ewes : 1. On the Milk Yield of Ewes with Special Reference to Its Relation to the Growth of Suckling Lambs
著者
菅井 一男 岡山大学
寺本 憲太 農林省中国種畜牧場
抄録
This work was undertaken to study the milk yield of Corriedale ewes and the liveweight of lambs produced from those ewes with special reference to the relation of the milk yield to the growth from birth to weaning of suckling lambs. The animals used were 7 Corriedale ewes of 3 years of age and 9 Iambs (singles 5, twins 4) born from those ewes in the spring, 1957 at the Chugoku Stock Breeding Farm of the Department of Agriculture and Forestry. The milk yield of ewes was estimated from the difference of the liveweight of lambs weighed before and after suckling and the records of the milk yeild of ewes and of the liveweight of lambs were taken at 10 days intervals after birth. The results obtained were as follows : (1) It was found that the milk yield of ewes was highest during the period from 10 to 20 days after lambing and then gradually declined. (2) It seems that the ewes of higher milk yield during the first one month after lambing are greater on the average daily milk production during each 10 days period after lambing and on the total milk production during three months, as compared with those of lower milk yield. (3) Significant correlations were not found between the total milk yield of ewes during three months after lambing and their liveweight on the lambing day and between the former and the liveweight of lambs on the day of lambing. (4) Average total milk yield during three months from birth to weaning was 83.3 kg and the average daily weight gain per single lamb 240 g. (5) There were a few significant correlations between the milk yield of ewes during each one month period and during three months period and the liveweight gains of lambs after birth and was generally a increasing tendency of the correlation coefficient values, as lambs grew older. It seems that those tendencies need further investigation. (6) However, a significent correlation (r=+0.91) was found between the total milk yield of ewes and the average daily weight gain of lambs during three months period from lambing to weaning. (7) It was found that the correlations between the average daily liveweight gain of lambs during three months period and the liveweight of ewes on the lambing day and between the former and the birth weight of lambs were not significant.
発行日
1958
出版物タイトル
岡山大学農学部学術報告
出版物タイトル(別表記)
Scientific Reports of the Faculty of Agriculture Okayama University
11巻
1号
出版者
岡山大学農学部
出版者(別表記)
Faculty of Agriculture, Okayama University
開始ページ
61
終了ページ
67
ISSN
0474-0254
NCID
AN00033029
資料タイプ
紀要論文
言語
Japanese
論文のバージョン
publisher
査読
無し
Eprints Journal Name
srfa