海原县不同杂交代西门达母牛外貌及生产性能的差异

Differences in Appearance and Production Performance of Simmental Hybrid Cows of Different Generations in Haiyuan County

文章通过对宁夏海原县部分肉牛养殖企业和养殖户调研发现,目前西门达尔母牛牛群结构处于不同杂交代,F1代比例在0.48%(4/834),F2代平均在8.15%(68/834),F3代平均49.76%(415/834),F4代平均41.61%(347/834)。不同代数西门达尔杂交母牛,在繁殖性能上存在较大差异:品种越纯,性成熟期越长,尤其是生殖系统发育不全的母牛比例越高(3%~5%),产后恢复和配种时间越长。针对生产性能的差异,应采取相应的技术措施加以提高。

According to the survey of some beef cattle breeding enterprises and farmers in Haiyuan county, Ningxia, this article found that Simmental cows were currently in different hybrid generations, the proportion of F1 generation was 0.48%(4/834), F2 generation was 8.15%(68/834), F3 generation was 49.76%(415/834), and F4 generation was 41.61%(347/834). In addition, the reproductive performance of Simmental hybrid cows of different generations was quite different. For cows, the purer the breed, the longer sexual maturity period, especially the higher proportion of cows with underdeveloped reproductive systems(3% to 5%), and the longer recovery and breeding time after delivery. In view of the difference in production performance, corresponding technical measures should be taken to improve it.