Analysis of Factors Influencing Dystocia Degrees of Holstein
[Objective]ln order to investigate factors of calving traits and production performance influencing dystocia degrees of Hostein in Xinjiang, [ Method ] The effects on dystocia degrees were analyzed by SAS8.1 CLM . [ Result]The results showed that : effect of different parity on dystocia degrees was significant ( P ＜ 0.05) ; effect of different calving season on dystocia degrees was significant ( P ＜ 0.05) ; effect of different days of pregnancy on dystocia degrees was not significant ( P ＞ 0.05) ; effect of different calving interval on dystocia degrees was highly significant ( P ＜ 0.01) ; effect of calf sex on dystocia degrees was significant ( P ＜ 0.05); effect of birth weight on dystocia degrees was highly significant ( P ＜ 0.01); effect of different calving type on dystocia degrees was highly significant ( P ＜ 0.01) ; effect of 305 - day milk yield on dystocia degrees was not significant ( P ＞ 0.05) [Conclusion] In this paper, the dystocia factors of Holstein were analyzed by a large number of record materials which will effectively help to prevent dystocia and reduce the occurrence rate of dystocia.
国家科技期刊平台
NSTL
万方数据
维普
