不同添加剂对大别山黄牛育肥效果研究

Fattening Effects of Different Additives on Dabieshan Yellow Cattle

选择大别山黄牛 ２０头，随机分为 ４组，每组 ５头，饲喂相同日粮，其中一组作对照，试验组分别添加类氨酸（甲基脲），磷酸脲及复合饲料添加剂。９０ｄ育肥试验头均日增重分别为 ０．５５ｋｇ ，０．６５ｋｇ， ０．５７ｋｇ及 ０．７２ｋｇ。类氨酸、磷酸脲及复合添加剂组分别比对照组提高 １８． ２％， ３． ６％和 ３０． ９％，类氨酸和复合添加剂组每公斤增重成本，分别比对照组降低２２．２％和２２％，磷酸脲组比对照组增加８．９％，从日增重及增重成本看，复合添加剂组最佳。

In 90 days, 20 Dabieshan yellow cattles were divided into four groups, fed on diets containing no additives(controls), methyl-urea(diet1), urea phosphate(diet2) and additive premix (diet3 ), respectively. Average daily gain was 0. 55, 0. 65, 0. 57 and 0 .72kg respectively. Diet 1, 2 and 3 had higher daily gain (by 18 .2%, 3. 6% and 30.9 % ) than that of the controls. The cost of per unit gain was decreased to 22. 5 % and 22 %. Diet 2 had higher cost of per unit gain (by 8 % ) than that of controls. Higher daily gain and economic efficiency were observed in diets containing additive premix.