育肥肉牛两种无豆粕型日粮饲喂效果比较及效益分析

Feeding Effect Comparison and Benefit Analysis of Two Kinds of Soybean Meal Free Diets for Fattening Beef Cattle

肉牛育肥通常使用豆粕作为蛋白质来源,价格较高,为了达到降低精料成本提高肉牛增重的目的,选择低成本蛋白原料通过搭配组合替代豆粕,选择育肥后期西门塔尔牛28头,随机分为A、B 2组,A组育肥浓缩料中添加缓释尿素NP200和玉米胚芽粕,B组育肥浓缩料中添加菜籽粕,其余蛋白质来源相同,粗饲料为国产燕麦草,进行为期29 d的育肥试验。结果表明:试验A组比B组日增重提高9.42%,料重比降低8.67%,每日收益提高69.1%。添加缓释尿素的A组日粮方案效益更好,可用于北方肉牛育肥后期使用。

The cost of soybean meal(SBM)which is the main protein material is higher than that of other protein materials for beef cattle fattening.In this study,the mixed low-cost protein raw materials replaced SBM for reducing the cost of concentrate and increasing the weight-gain.In the 29-day trial,28 late fattening period simental cattle were randomly divided into groups A and B on the average.Slow-release urea NP200 and corn germ meal were added into the group A,while the rapeseed meal into group B.The roughage was domestic oat grass and the other protein feed was the same.The result showed that compared with group B,the daily gain of group A was increased by 9.42%,the ratio of feed to gain was decreased by 8.67%,and the daily profit was increased by 69.1%.Thus,the diets supplemented with slow-release urea and corn germ meal had better benefits and could be used in late fattening period of beef cattle in northern China.