Effect of Suckling Stimulation and Milk Yield on Postpartum Ovarian Activity and Uterine Involution in Grazing Beef Cows

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X

In beef cows, a milk yield showed an inhibitory effect on both the postpartum ovarian activity and the uterine involution. The suckling stimulation, however, indicated a suppressive effect on the former, while a hastening effect on the latter. This conclusion was derived from the results of multiple regression analyses on suckling cows, which were subjected to restricted sucklings twice a day and early weaning. In estimating adequate intervals from calving to first ovulation, following were the relevant factors in order of decreasing importance: parity > milk yield > body weight changes caused by nutrient conditions > suckling stimulation. The factors affecting uterine involution could also be ranked as follows in decreasing order of importance: parity > milk yield > sucking stimulation. The uterine involution was more stable than the postpartum ovarian activity in terms of the sensitivity to some critical factors

作成者 Yoshiaki IZAIKE
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 209
終了ページ 215
言語 eng