家畜生态学报2017，Vol.38Issue(12)：67-72,6.
胎衣不下对荷斯坦牛泌乳性能的影响
The Effect of Placenta Retention on Lactation Performances of Holstein Cows
摘要
Abstract
To study the effect of placenta retention on lactation performance of dairy cows in different year,season,calving season,lactation stage and parity,and in order to provide a reliable theoretical basis for improving the lactation performance and milk quality of dairy cows.A total of 4247 dairy cows’ DHI production performance recorded were collected from 2013 to 2015,the lactation performances of dairy cows were measured by multiple factor variance (ANOVA) in different year,season,calving season,parity and lactation stage.The results showed that:the 4 traits of milk production,including somatic cell score,lactose and milk urea nitrogen were significantly affected (P＜0.05) by dairy cows with placenta retention in different calving season,season,year,lactation stage and parity.Placenta retention cows with spring,summer and autumn calves,had a lower significant effect on daily milk production than the normal cows (P＜0.05).Placenta retention cows with early lactation calves,had a lower significant effect on daily milk production than the normal cows (P＜0.05).Placenta retention cows tested in autumn and winter,had a lower significant effect on daily milk production than the normal cows (P＜0.05).Placenta retention cows with first and third parity calves,had a lower significant effect on daily milk production than the normal cows (P＜0.05).关键词
胎衣不下/荷斯坦牛/泌乳性能Key words
placenta retention/Holstein cows/lactation performances分类
农业科技引用本文复制引用
倪炜,王梦琦,张慧敏,李明勋,刘洵,王西朴,蒋彦森,毛永江..胎衣不下对荷斯坦牛泌乳性能的影响[J].家畜生态学报,2017,38(12):67-72,6.基金项目
江苏省苏北专项(BN2016027) （BN2016027）
江苏企业研究生工作站资助项目 （）
