観血去勢法とゴム去勢法の違いが子牛の発育に及ぼす影響

概要

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黒毛和種雄子牛における去勢法の違いが子牛の発育に及ぼす影響について検討した結果，作業時間はゴムリングによる去勢が観血去勢より短いが，去勢後の飼料摂取量・増体の向上には，観血去勢が有効な手法と考えられる。さらに，ゴムリングによる去勢においては，去勢後10日程度にゴムリング以下の陰のうを切除する方が去勢後の体重の増加に有効であると考えられた。A comparative study of castration methods between surgical excision of scrotum and bloodless operation was conducted for the effect of development in Japanese Black Calf. In excision，perineal vessels were not knotted，but twisted and tore. The method with rubber band was used as bloodless operation. Although the time spent for operation was shorter in bloodless than excision，excision seemed more useful than bloodless operation for feed ingestion and gain of body weight. Moreover，the study combined with excision and bloodless operation brought the consideration that in bloodless method, excision of the scrotum after about 1O days from castration was effective to feed ingestion and gain of body weight.
琉球大学農学部の論文