【摘要】 为筛选效益较好的肉牛饲料配方,研究设计了3个饲料配方,用杂交牛进行了为期60 d的对比育肥试验,同时为探索肉牛饲料中蛋白质的过瘤胃保护效果,以3号配方配制的补充料为基础,用醋酸和甲醛对菜籽粕和豆粕进行了过瘤胃蛋白保护处理。结果表明:在配方筛选试验中,使用3号配方的第3组效果最好,日增重达1 273 g,饲料价格仅为1 500元/t。在过瘤胃蛋白保护处理中,以第4组甲醛保护的效果较理想,日增重达1 508 g,比未保护的对照组(第3组)提高18.46%;用醋酸保护的第5组,日增重为1 402 g,较对照组提高10.08%。更多还原

【Abstract】 For selecting the meat cattle feed diet of better efficiency,3 feed diets were studied and designed.6 d comparative fattening experiment was done with hybrid cattle.Meanwhile for probing the protective effect on by-pass protein in meat cattle feet,based on suppliment made with diet No.3,used ethane acid and formol in by-pass protein protection treatment on canola seed meal and bean meal.The results showed that: in the experiment to select diet,group 3 which used diet No.3 had the best result,daily weight gain 1 273 g,the price of feed was only 1 500 yuan/t;group 2 which used diet No.2,had daily weight gain 1 275 g,feed price 1 750 yuan/t;for group 1 which used diet No.1,daily weight gain 1 142 g,feed price 1 710 yuan/t.In the treatment of by-pass protein protection,formol used in group 4 had more ideal protective effect,daily weight gain 1 508 g,increased 18.46 percent compared with the contrast(group 3) without protection;daily weight gain for group 5 which used ethane acid to protect,was 1 402 g,which was 10.08 percent higher than the contrast.更多还原