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 generationsinHaiyuan County

中文关键词: 不同杂交代  西门塔尔杂交母牛  外貌特征  生产性能

英文关键词: different hybrid generations  Simmental hybrid cattle  appearance characteristics  production performance

中文摘要:

      本文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(约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。

英文摘要:

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