三个黄牛品种的年龄、体重与产肉性能的相关分析

In order to find the correlation of age, live body weight and beef performance， Comparison of Straits among Qinchuan ,Jinnan and Luxi cattle were carried. Our results demonstrated that breed had effects on beef quality and yield. beef tenderness of Jinnan cattle was better than other two breeds, live body weight significantly affected on beef yield; age affects on the day–increasing weight significantly but had no remarkable influence on beef quality(P>0.05),，Co-effect of breed and age also had significant effects on the productivity of high-grade meat(P<0.01).Those means that improved breeds, and selecting cattle with faster increasing weight and higher meat-productivity should be conducted to improve beef performance.