家畜生态学报2017，Vol.38Issue(3)：52-55,4.
胎次、犊牛性别和初生重及产犊季节对奶牛繁殖性能的影响
Effect of Parity, Calves' Gender, Birth Weight and Calving Season on Reproductive Traits of Holstein Cows
摘要
Abstract
In order to study the effects of different parities,calves' gender,birth weight and calving season on reproductive traits of Holstein cows and provide a reference for scientific mating strategies and postpartum care for them,120 Holstein cows' reproductive traits data including postpartum estrus time,mating time,fetal-membrane expulsion time,cervical mucus score and rectal palpation score were determined and the correlations of their history records including different parities,calves' gender,birth weight and calving season with traits were analyzed.Results showed postpartum estrus time in cows who experienced the forth calf and more was later by 10～18 d,cervical mucus score was lower by 0.59～0.79 points,and rectal palpation score was lower by 0.53～0.85 points than previous parity(P＜0.05);Postpartum estrus time of those cows who delivered female calves was earlier than that of those who delivered male by 3.15 d;Fetal-membrane expulsion time of those cows whose calve birth weights were heavier than 45 kg was the longest (17 h);Postpartum estrus time of those cows who delivered calves in winter was earlier by 10～12 d than other seasons(P＜0.05).Results demonstrated that calving parity,calves' gender,birth weight and calving season have affected significantly reproductive traits in Holstein cows.关键词
荷斯坦奶牛/胎次/犊牛性别/产犊季节/繁殖性能Key words
Holstein cows/parity/calves' gender/calving season/reproductive traits分类
农业科技引用本文复制引用
王欣荣,刘婷,苏东伟,成述儒,吴建平..胎次、犊牛性别和初生重及产犊季节对奶牛繁殖性能的影响[J].家畜生态学报,2017,38(3):52-55,4.基金项目
国家自然科学基金(31560634) （31560634）
