摘要
对带犊牦牛分别在8月1日、8月27日和10月12日进行断乳,结果Ⅰ组母牛共发情104头,发情率为69.33%,Ⅱ组母牛发情54头,发情率为36.00%,Ⅰ组比Ⅱ组多发情50头,高48.01%,差异性极显著(P<0.01)。Ⅲ组母牛发情4头,发情率4%。Ⅱ组比三组Ⅲ组多发情36头,高90%,差异性极显著(P<0.01)。Ⅰ组母牦牛发情率最高,持续时间长,Ⅱ组母牦牛只有一个发情高峰,持续比较短,Ⅲ组母牦牛发情率低,持续时间也短。
The pregnant female yaks were weaned on August lth,Augwt 27th and octobtr 12th respectively. The results showed that 104 female yaks were estrus in group Ⅰ,estrus rate was 69.33% ;54 female yaks were estrus,estrus rate was 36.00% in group Ⅱ; Group Ⅰ was 50 more than group II. There is a very significant difference between group Ⅰ and group Ⅱ. （ P 〈 0.01 ）3 female yaks were estrus in group Ⅲ, estrus rate was 4%. Group Ⅱ was 36 more than group Ⅲ. There is a very significant difference between group Ⅱ and group Ⅲ. （ P 〈 0.01 ）
出处
《青海畜牧兽医杂志》
2012年第6期22-23,共2页
Chinese Qinghai Journal of Animal and Veterinary Sciences
关键词
牦牛
不同时期
断乳
发情率
Yaks
Different period
weaning
Estrus rate
