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タイトルヨミ
ホウボクギュウ ノ セイリ セイタイ ニ カンスル ケンキュウ 2 13 BEATMETERホウ ニヨッテ ソクテイシタ ゲンヤ ホウボク ワギュウ ノ エネルギー ショウヒリョウ ノ キセツテキ ヘンカ
日本語以外のタイトル
Physiological and Ecological Studies on the Grazing Cattle(II-13) : Seasonal Changes in Energy Expenditure of Grazing Japanese Black Breed cows measured by Beatmeter Method
ファイル
言語
日本語
著者
加藤 正信
春本 直
青木 晋平
内容記述(抄録等)
The seasonal changes in energy expenditure of grazing cows were studied on Sambe native grassland in Shimane Prefecture from May to October, 1965. Two dry Japanese Black Breed cows, 8 and 10 years old, were used in this study.
The energy expedniture was indirectly measured by the beatmeter method.
The prircipal results obtained were as follows :
1. Daily heat production per kilogram of body weight was about 28 Cal. in late May, and it increased gradually until late summer. The maximum heat production (about 34 Cal.) was reached in the middle of August, and this value decreased a little in the middle of September. Late in October, the heat production decreased to an abnormally low value of about 20 Cal. The energy expenditure obtained in this experiment was somewhat lower than our data already reported, perhaps because the cows used in this experiment were rather old and were well experienced in grazing.
2. The ratio of rumination energy to grazing energy was the highest in August and the lowest in May and October. It suggested that the forage intake was large in August and small in May and October.
3. Cows gained body weight satisfactorily until September, but lost their weights in October. Considering the loss in body weight and abnormal decrement in energy expenditure in October, and for the conservation of grassland, we take a view that the most desirable grazirg period in this district is from early June to early October.
掲載誌名
島根農科大学研究報告
15
開始ページ
(A-1)76-80
ISSN
05598311
発行日
1967-01-31
NCID
AN00108241
出版者
島根農科大学
出版者別表記
The Shimane Agricultural College
資料タイプ
紀要論文
部局
生物資源科学部
備考
A,Bを含む
開学十五周年記念号(Commemoration Issue for the 15th Aniversary)
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