补饲对母牦牛发情的影响

Effects of supplementary feeding on estrus control of female yaks

为了使牦牛的发情提前到6月份,缩短牦牛的繁殖周期,提高牦牛的繁殖性能,使得犊牛在冷季来临之前有一个较长的生长期,减少冷季对犊牛的影响,试验采用冷季补饲的方式,提高母牦牛营养,使其提前发情,结果试验组母牛在6月份发情16头,发情率为32%,对照组母牛在6月份发情0头,两组母牛的发情率达到极显著水平(P<0.01)。

To make the yak estrus brought forward to June,shorten the breeding cycle of yak,improve the reproductive performance of yak,the calf before the cold season has a longer growth period,reduce the influence of cold season on calf. Experiment of supplementary feeding in cold season was implemented for improving nutrition of female yak,making its estrus ahead of schedule. The results showed that 16 female yaks in experimental group happens estrus in June,estrus rate was 32%. Zero female yaks in the control group happens estrus in June. There is significantly difference in estrus rate（ P〈0. 01） between experimental groups and control groups.