]*>","")" /> Study on Growth and Development of Different Breeds of Bull Calves with Grazing and Supplymentary Feedding
Xinjiang Agricultural Sciences

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Study on Growth and Development of Different Breeds of Bull Calves with Grazing and Supplymentary Feedding

YU Qing-yun;YU Xiong;ZHOU Lei;ZHANG Yang   

  • Received:2006-03-25 Revised:2006-03-25 Online:2006-03-25 Published:2006-03-25

不同品种公犊放牧补饲生长发育的研究

于青云;余雄;周磊;张扬   

  1. 新疆农业大学动物科学学院动物营养实验室,新疆乌鲁木齐,830052;新疆畜牧科学院畜牧研究所,新疆乌鲁木齐,830000





摘要： 研究纯种的新疆褐牛、西门塔尔、安格斯和荷斯坦5～6月龄公犊在放牧条件下平均每日补饲1.5 kg精料的生长发育情况.10月龄时四个品种犊牛的体重分别187.86±22.35,198.60±41.74,212.60±35.96和233.66±21.62 kg.平均日增重为0.78±0.18,0.79±0.21,0.81±0.14和0.75±0.11 kg.屠宰率、净肉率和眼肌面积分别为48.36;、53.23;、51.56;和52.35;;34.40;、37.55;、42.10;和37.89;;32.62、78.56、62.67和58.98 cm2.放牧犊牛的生长发育随牧草和季节变化呈现出波动性,出现两个生长高峰(6～7月和10月)和一个平缓期(8～9月).