【摘要】 对江苏省徐州市某奶牛场约800头荷斯坦奶牛1998到1999年产犊间隔与产犊季节、产奶量、产犊胎次、犊牛初生重、犊牛性别等基础资料进行统计分析,结果表明:产犊季节对产犊间隔有极显著的影响(P<0.01);奶牛的产奶量对产犊间隔也有极显著的影响(P<0.01);产犊胎次、犊牛初生重及犊牛性别对产犊间隔无显著影响(P>0.05)。更多还原

【Abstract】 We analysed about 800 dairy cattle data of the calving interval, calving season, milk production, calving number, birth weight and sex of the calving. Which collected from the some ranch of Xuzhou city from 1998 to 1999. The result indicated that: Not only the calving season but also the milk production great effect on calving interval (P<0.01). But the parity, weight of calves and sex of the calves didn’t show significantly effect on calving interval (P>0.05).更多还原