不同杂交组合改良北塔山土种牛生长性能与肉用性能的比较

Comparison of interbreeding of native-born Beitashan cattle with other cattle breeds in improving growth and meat performance

通过对安格斯牛、利木赞牛、西门塔尔牛和新疆褐牛与北塔山牧场土种牛杂交一代的生长性能指标和肉用指标的测量,比较了4种牛杂交改良北塔山牧场土种牛的效果。结果显示：4种牛对北塔山土种牛的杂交改良效果均极显著,其中以利木赞牛为父本和以西门塔尔牛为父本的杂种牛在3月龄体重、6月龄体重、12月龄体重、18月龄体重、日增重、体尺、胴体重、净肉重、屠宰率、净肉率、胴体产肉率等指标上均表现出了优于土种牛和其他2个杂交组合。建议北塔山牧场选择利木赞牛或西门塔尔牛作为本地土种牛杂交改良的父本进行推广。

In this experiment, the growth performance indexes and meat performance indexes of the first-filial generations of Angus cattle, Limousin cattle, Simmental or Xinjiang brown cattle crossing with native-born cattle on the Beitashan pasture were compared. The results showed that the four breeds of foreign cattle had had significant effect on the hybridization with the native-born Baitashan cattle. And, the in- terbreedings of Meomu Zan cattle and Simmental cattle as male parent both had better effect on the first-filial generations in three-month-old body weight, six-month-old body weight, 12-month-old body weight and 18-month-old body, and in weight gain, body size, carcass weight, net meat weight, slaughter rate, net meat rate, carcass meat rate and so on than those indexes of the control group and the other two test groups. Therefore, it is recommended that, on Kitamura Ranch, Limousin cattle or Simmental cattle are selected male parent in inter- breeding to improve the native-born cattle.