非遗传因素对引进安格斯牛产犊间隔的影响

Effects of Non-genetic Factors on Calving Interval of Imported Angus Cattle

为探讨非遗传因素对引进安格斯牛产犊间隔的影响,对新疆喀什地区某安格斯牛繁育场从澳洲引进的1309头同批次青年安格斯牛母牛的配种情况进行了分析,并采用最小二乘法分析了产犊季节和产犊胎次对母牛产犊间隔的影响。结果表明,产犊季节和产犊胎次对引进安格斯牛母牛的产犊间隔均有极显著的影响(P<0.01),且冬春季节的产犊间隔极显著高于夏季(P<0.01);第1、2胎次与第3胎次产犊间隔具有极显著差异(P<0.01)。综上所述,产犊季节和产犊胎次对安格斯牛的产犊间隔影响较大,因此养殖企业可以通过控制人工输精时间,使母牛集中在夏季进行产犊,同时加强产后护理和牛群年龄优化,进一步缩短产犊间隔,提高繁殖效率,增加养殖收益。

The objective of this study was to investigate the effects of non-genetic factors on calving interval of imported Angus cattle.The study was conducted on the breeding and parturition data of 1309 Angus cattle imported from Australia in a breeding farm in Kashgar,Xinjiang.The least square method was used to analyze the relationship of calving season and parity on calving interval.The results showed that both the calving season and parity had highly significant effects on the calving interval of Angus cattle.Different seasons influenced the calving interval of imported Angus cattle significantly(P<0.01),and the calving interval in winter and spring was significantly longer than that in summer(P<0.01);there was also a highly significant difference between the 1st,2nd and 3rd calving intervals(P<0.01).In conclusion,calving season and parity have a great impact on calving interval,so it is recommended that cattle scale enterprises concentrate the cows to calve in the summer by regulating and controlling the artificial insemination time systematically,and take good care of the postpartum cattle and optimize the age structure,so as to shorten the calving interval and improve the breeding efficiency and profitability.