摘要
受胎率是衡量奶牛场繁殖水平的重要指标之一,其中奶牛首配受胎率是影响牧场受胎率高低的重要因素.为研究不同月份、胎次及子宫复旧程度三个因素对奶牛首配受胎率的影响,本试验对某规模化奶牛场全年参配母牛繁殖数据进行统计分析.结果表明,1、5、9、10、11五个月份的奶牛受胎率显著高于7、8月份(P<0.05);2、3、6、7、8月份差异不显著(P>0.05).一胎次的母牛首配受胎率与其他胎次相比差异显著(P<0.05);奶牛首配受胎率随着胎次的增加而降低.子宫复旧程度为0分的奶牛首配受胎率显著高于1～3分的(P<0.05),子宫炎症越严重,首配受胎率越低.
Abstract
the conception rate is one of the important indicators to measure the reproduction level of dairy farms,in which the first mating conception rate of dairy cows is an important factor affecting the conception rate of dairy farms.In order to study the effects of different months,parity and uterine involution on the first mating conception rate of dairy cows,the reproductive data of participating cows in a large-scale dairy farm were statistically analyzed.The results showed that the conception rate of dairy cows in January,May,September,October and November was significantly higher than that in July and August(P<0.05),but there was no significant difference in February,March,June,July and August(P>0.05).The first mating conception rate of cows with one parity was significantly different from that of other parity(P<0.05),and the first conception rate of dairy cows decreased with the increase of parity.The first mating conception rate of dairy cows with 0 degree of uterine involution was significantly higher than that of 1～3 murals(P<0.05).The more severe the inflammation of uterine involution,the lower the first mating conception rate.
国家科技期刊平台
NSTL
万方数据