摘要
研究了级进杂交对不同代次的西杂犊牛体重和西杂母牛泌乳性能的影响。结果表明 ,与本地犊牛相比 ,F1～F4 西杂犊牛的初生重分别提高 70 15 %、80 19%、90 0 7%、10 0 45 % ;6月龄分别提高 43 73%、5 3 6 5 %、6 3 5 9%、5 0 85 % ;12月龄分别提高 2 2 99%、48 11%、5 5 85 %、46 73% ,差异均极显著 (P <0 0 5 )。综合考虑 ,级进杂交进行到F3
The upgrading effects on the weight of simmental crossbreed calves and the milk performance of the female simmental crossbreed cattle were in the paper. The results showed: The body weight at birth, 6 months,12months of F 1～F 4 calves were 70.15%, 80.19%, 90.07%, 100.45%; 43.73%, 53.65%, 63.59%,and 22.99%, 48.11%, 55.85%, 46.73% higher than native calves, respectively. With the enhancement of upgrading the milk performance of the female simmehtal crossbreed cattle raised gradually. On the other hand,6 month and 12 month weight of F 4 were lower than that of F 3 because the feeding condition in local area was poor. In consideration of premises, it was suitable that the upgrading runs up to F 3.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2000年第4期80-82,103,共4页
Journal of Hebei Agricultural University
基金
国家"九五"重大科技攻关专题"肉牛高效快繁综合配套技术研究"(96-003-11)
