【摘要】 选择48头体重相近[(220.42±30.86)kg]的8~10月龄西门塔尔杂交肉牛随机分为4个试验组,饲喂添加从0%到18%豆粕的4组等蛋白、等能量的玉米干酒精糟+玉米精补料,探讨4组不同豆粕添加量的精补料饲喂杂交肉牛的育肥性能和成本。133 d育肥试验的结果表明,饲喂0%和5%豆粕精补料的杂交肉牛增重和料重比均优于饲喂18%豆粕精补料的杂交肉牛;单位增重成本均低于18%豆粕精补料,分别降低了13.01%和10.59%;饲喂0%和5%豆粕精补料的各项试验指标最好,饲喂13%豆粕精补料的较差,饲喂18%豆粕精补料的最差(P<0.05、P<0.01)。显著性差异来自线性效应。由此,随着提高精补料豆粕添加量,西杂肉牛没有改善总增重和日增重、料重比及体增重成本,精补料蛋白质品质对肉牛育肥性能作用甚微;通过比较肉牛育肥效果和成本,玉米干酒精糟(DDGS)是豆粕最佳替代蛋白饲料。更多还原

【Abstract】 A trial was conducted to determine the effect of dietary SBM supplementation on finishing performance and cost of Simmental crossbred beef cattle. 48 Simmental crossbred beef cattle [average BW=(220.42±30.86) kg] at the age of 8~10 months fed four DDGS+corn diets whose SBM increased from 0% to 18% under the same conditions of protein and energy. After 133 d finishing period, the average bodyweight gain and feed/gain for the cross-bred beef cattle fed 0% or 5% SBM diet were superior to those fed with 18% SBM diet; the cost per kg gain was lower than those fed with 18% SBM diet, decreased by 13.01% or 10.59%; feeding 0% and 5% SBM diets showed the best,13% SBM diet worse and 18% SBM diet the worst results(P<0.05,P<0.01). The significance is the linear effect. It was concluded that the cross-bred beef cattle had no improvement in finishing performance, feed efficiency and cost per kg gain as SBM supplementation increased; the effect of the protein quality was not observed on finishing performance of beef cattle; DDGS was the best substitute protein feed for SBM.更多还原