摘要
本文以新疆呼图壁种牛场牧一场2005-2008年年间1781头荷斯坦奶牛的产犊记录为基础,分析了异常分娩、性别、胎次、季节等4种情况下奶牛胎衣不下率的变化情况。结果表明:对于分娩母牛,双胎时胎衣不下率为74.6%,早产时胎衣不下率为82.9%;犊牛为公犊时胎衣不下率高于母犊时的胎衣不下率;随着胎次的增加母牛胎衣不下率逐渐升高;春、冬季节母牛胎衣不下率明显高于夏、秋季节。
According to calving records of 1781 Holstein cows from first ranch in Hutubi herd farm between 2005 and 2008,and the ratio of retainedafterbirth in Holstein cows were analyzed with considering four condition metatocia,sex,parity,season etc.The results showed that retainedafterbirth ratio was 74.6% for twins,and 82.9% for slink,respectively,Retainedafterbirth ratio of bullcalf was higher than heifer,With the growth of parity,retention of afterbirth was increased continuously,retainedafterbirth ratio of spring and winter was higher than summer and autumn.
出处
《草食家畜》
2011年第3期81-83,共3页
Grass-Feeding Livestock
基金
国家"十一五"科技支撑计划重大项目(2006BAD04A11-06)
新疆维吾尔自治区"十一五"重大专项项目(200731134)
国家现代农业产业技术体系(奶牛
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关键词
荷斯坦奶牛
胎衣不下
Holstein cow
Retainedafterbirth
