影响奶牛产后卵巢周期活动恢复的因素研究分析

摘要

本研究通过对宁夏区内5个规模奶牛场的繁殖母牛生殖状况调查的基础之上,分析表明,产前体况评分为3.25～4,产后体况评分为2.75～3.5,年泌乳量为7 000～5 000kg,产犊季节在秋冬季、经产奶牛等因素与其相对应的对照组比较,产后卵巢开始活动的时间、产后第一次站立发情的时间、产后第一次配种时间明显提前(P<0.05),受胎率明显增高(P<0.05),产犊指数明显缩短(P<0.05).%Based on the investigation results of post-partum cow fertility in 5 scale dairy farms of Ningxia.The research results showed that : prenatal body condition score is 3.25～3.5, the year lactation 7000～5000 kg calving season is the autumn and winter.Multiparous cattle is compared with the control group,the onset of ovarian activity in postpartum.the first time of standing heat in postpartum,the time of first service in postpartum are significantly ahead of schedule(P＜0.05),conception rate increased significantly (P＜0.05),calving index was significantly shortened (P＜0.05).