不同精料补饲水平对科尔沁黄牛育肥效果的影响

Effect of Different Level of Complemental Feed on Gaining Weight of Khorchin Cattle

[目的]为了寻找最适合科尔沁黄牛的精料补饲水平。[方法]试验选取18~20月龄科尔沁黄牛90头,平均体重在300~320 kg左右,随机分为6组,每组15头,6组间牛始重差异不显著（P〉0.05）。肉牛自由采食玉米秸秆的同时,试验各组每头每天分别饲喂3.0 kg、3.5 kg、4.0 kg、4.5 kg、5.0 kg、5.5 kg的精料补充料。[结果]表明：随着精料补饲量的增加,牛的平均日增重逐渐增加,但饲料转化率是先增加后降低。[结论]结合增重和精料转化率分析,18~20月龄科尔沁黄牛以补饲4.5 kg/（头.d）最佳。

【Objective】In order to find the most suitable concentrate feeding level for Khorchin cattle.【Method】Ninety Khorchin Cattle at the age of 18~20 months were selected for the experiment,the average weight was 300~320 kg.They were divided into six groups by random,each group contains 15,The difference of beginning weight was not significant（P0.05）.Cattle feed corn straw optionally,every day trial groups were fed 3.0kg,3.5 kg,4.0 kg,4.5 kg,5.0kg,5.5 kg concentrate,respectively.【Result】The results showed that with the increase of the amount of concentrate supplement,the average daily gain increased gradually,but the feed conversion ratio increased at first then decreased.【Conclusion】 Combined the weight gain and concentrates conversion ratio,the best quantity is 4.5 kg per cattle per day for the 18~20 months khorchin cattle.