荷斯坦牛妊娠天数影响因素分析

Analysis on Influencing Factors of Pregnancy Days in Holstein Cows

准确把握奶牛预产期对实施精准饲养管理具有重要意义。不同品种、不同地域的奶牛妊娠天数的长短是有差异的。为了解荷斯坦牛妊娠天数长短及其影响因素,本文收集了河南省某大型奶牛场2018年3月至2019年10月产犊的荷斯牛产犊记录5000条,就分娩季节、新生犊牛性别、使用普通冻精或性控冻精配种、新生犊牛初生体重、母牛胎次等因素对妊娠天数的影响进行分析。结果显示,产犊季节、新生犊牛性别、不同冻精、不同胎次及犊牛初生体重对奶牛妊娠天数有极显著影响(P<0.01)。

Accurately grasping the expected date of delivery of dairy cows is of great significance to the implementation of accurate feeding management.Pregnancy days of cows of different breeds and regions are different.In order to understand pregnancy days and its influencing factors in Holstein cows,a total of 5000 calving records of Holstein cows born from March 2018 to October 2019 were collected from a large Holstein dairy farm in Henan Province,The effects of birth season,sex of newborn calf,whether adopted sex-controlled frozen semen mating,birth weight of newborn calf and cow parity on pregnancy days were analyzed.