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

发布时间：2019-06-15 13:57

【摘要】：为研究不同胎次、犊牛性别和初生重以及产犊季节对繁殖性能的影响,为奶牛的科学配种与产后护理提供参考,本研究测定了120头荷斯坦奶牛产后第一次发情、配种时间、胎衣排出时间、子宫粘液评分及直肠检查评分等繁殖性能指标,并与奶牛的胎次、犊牛性别和初生重以及产犊季节进行相关性分析。结果表明,4胎及以上奶牛的产后第一次发情时间比前3胎要迟10~18d,其产后子宫粘液评分低0.59~0.79分,直肠检查评分低0.53~0.85分(P0.05);产母犊的奶牛第一次发情时间比产公犊的早3.15d,当犊牛初生重大于45kg时奶牛胎衣排出时间最长(17h);冬季奶牛产后第一次发情时间比其它季节早10~12d(P0.05)。研究认为,不同胎次、犊牛性别和初生重以及产犊季节对奶牛产后的第一次发情时间、胎衣排出时间、子宫粘液和直肠检查评分有显著影响。
[Abstract]:In order to study the effects of different parity, sex and birth weight of calves and calving season on reproductive performance, and to provide reference for scientific breeding and postpartum nursing of dairy cows, 120 Holstein cows were measured for their first estrus, breeding time, fetal coat excretion time, uterine mucus score and rectal examination score. The correlation between sex and birth weight of calves and calving season was analyzed. The results showed that the first estrus time of 4 or more cows was 10 脳 18 days later than that of the first 3 fetuses, the postpartum uterine mucus score was 0.59 鈮，

本文编号：2500267