影响新疆地区荷斯坦奶牛产犊间隔的因素分析

目的]探讨各因素对新疆地区荷斯坦奶牛产犊间隔的影响.方法]采用SAS8.1软件对影响产犊间隔因素进行最小二乘方差分析.结果]不同场地对产犊间隔的影响不显著(P>0.05);不同胎次对产犊间隔有显著影响(P<0.05),产犊间隔随胎次增加有延长的趋势;不同产犊季节对产犊间隔有极显著影响(P<0.01),冬春季节产犊间隔明显高于夏秋季节;不同产奶量对产犊间隔有极显著影响(P<0.01),产犊间隔随着产奶量的增加而延长.结论]产犊季节和产奶量是影响产犊间隔主要因素.

Analysis of Factors Influencing Calving Interval of Holstein in Xinjiang Area

Objective]In order to investigate factors influencing calving interval of Holstein in Xinjiang area.Method]The effects on calving interval were analyzed by SAS8.1 GLM.Result]Effect of different farms on calving interval was not significant (P >0.05);Effect of different parities on calving interval was significant (P <0.05),the calving interval increased with the parity increased;effect of calving season on calving interval was highly significant (P <0.01),calving interval in spring and winter were much longer than that in summer and autumn;effect of different milk yield on calving interval was highly significant (P <0.01),the calving interval prolonged with the milk yield increased.Conclusion]Calving season and milk yield were the main factors influencing calving interval.