宁夏地区荷斯坦牛产奶量和产犊间隔影响因素分析

Factors influencing milk yield and calving interval of Holstein dairy cow in Ningxia area

为探讨影响宁夏地区荷斯坦牛产奶量和产犊间隔的非遗传因素,以宁夏某奶业有限公司2012—2016年间6 236头健康中国荷斯坦牛产奶性能记录和繁殖记录为研究材料,以305d产奶量和产犊间隔为研究对象,运用SAS8.1软件,采用多因素方差分析法分析场、胎次、初产月龄、产犊年份及产犊季节对荷斯坦牛305d产奶量和产犊间隔的影响。结果表明:场、胎次、产犊年份、产犊季节和产犊间隔均对荷斯坦牛305d产奶量有极显著影响(P<0.01),初产月龄对305d产奶量有显著影响(P<0.05);场、胎次、产犊季节和产奶量对产犊间隔有极显著影响(P<0.01)。研究发现胎次、初产月龄、产犊季节和产犊间隔是影响荷斯坦奶牛305d产奶量的重要因素,胎次、产犊季节和产奶量是影响奶牛产犊间隔的重要因素。

In order to investigate the factors influencing milk yield and the calving interval of Holstein cow in Ningxia,milk performance records and reproductive records from 6 236 Holstein cows were taken as experimental material from an Ningxia dairy company.By taking 305-day milk yield and calving interval as research object,the effects of SAS8.1 GLM on 305-day milk yield and calving interval were analyzed.The results showed that：Farm,parity,calving years,calving season and calving interval had highly significant effects on the milk yield（P〈0.01）.The age at first calving also showed significant effect on the milk yield（P〈0.05）.The farm,parity,calving season,and milk yield showed highly significant effects on calving interval（P〈0.01）.In conclusion,the parity,age at first calving and calving season were the important factors influencing the 305-day milk yield.The parity,calving season and milk yield were the important factors affecting the calving interval.