添加剂不同组分对罗姆尼羔羊体增重影响的研究

The Study of Different Components of Additive on Daily Body Weight Gain of Romney Ram Lamb

本试验采用 12 0只罗姆尼杂交一代公羔羊作为试验动物 ,根据体重分为 6组 ,每组 2 0只羊。除对照组以外 ,其余 5组分别饲喂成分依次叠加的添加剂。即试验 1组为微量元素、试验 2组在试验 1组添加剂的基础上添加维生素、试验 3组在试验 2组添加剂的基础上添加常量元素、试验4组在试验 3组添加剂的基础上添加氨基酸、试验 5组在试验 4组添加剂的基础上添加抗菌素 ,以研究添加剂不同组分对羔羊体增重的影响。结果表明 ,微量元素和抗菌素等组分的添加可使动物日增重分别比对照组 (88.3g/d)提高 2 9.2 %和 4 0 .9% (P <0 .0 1) ;粗饲料采食量分别提高 6 .9%和15 .7% ;精料转化率分别提高 5 %和 7%。维生素、常量元素及氨基酸等添加剂组分在本试验中对体增重无显著作用 (P >0 .0 5 ) ;但分别提高粗饲料采食量 6 .4 %、6 .4 %和 11.4 %。添加剂不同组分对动物的DM。

Romney×Merino ram lambs(4～5 month old) were divided into 6 groups of 20 animal each on basis of initial body weight. 5 groups were fed on micromineral(mi), mi+vitamin(v), mi+v+macro-mineral(ma), mi+v+ma+amino acid(aa) or mi+v+ma+aa+antibiotic superimposition components of additive in proper order, respectively, with the exception of control group in order to study the effect of the different components of additive on body weight gain of ram lamb. The results indicated that micromineral and antibiotic components of additive adding to concentrate increased average daily body weight gain of animal(ADBWG) by 29.2% and 40.9% (p<0.01), respectively, compared with the control group(ADBWG 88.3g/day); roughage intake increased by 6.9% and 15.7%, respectively; concentrate conversion efficiency increased by 5% and 7%, respectively. No significant effect was found from vitamin, macromineral or amino acid components of additive on body weight gain of ram lamb(P>0.05), except roughage intake was increased by 6.4%, 6.4% and 11.4%, respectively. The different component of additive had no influence on digestibilities of DM, OM and NDF of diet.