稀土作添加剂对肉仔鸡生产性能的影响

选用21 日龄笼养京黄肉仔鸡240 只随机分4 组,每组60 只。对照组仅喂基础饲粮,试验1 、2 、3 组在每千克基础饲粮中分别添加400mg、600mg 有机稀土和0 .5 % 730 稀土复合饲料添加剂,进行38 天饲养试验。结果表明,三个试验组只均增重比对照组依次提高8 .6 、10.6、10.1 个百分点,成活率分别提高1.6、3.3、1.6 个百分点,每千克增重耗料( 料重比) 分别减少9 .5 、11 .4、15 .1 个百分点。经F检验和多重比较,试1 组与对照组间差异显著(P< 0 .05) 、试2 、3 组与对照组间均差异极显著(P< 0.01) 。3 个试验组经济效益均高于对照组,以试2 组鸡的最好。

Effects of Rare Earth as an Additive on Production Performance of Broilers

Beijin Yellow broilers aged 21 days in cage rearing were randomly divided into 4 groups of 60 broliers each.On the basis of that the broilers in the control group were fed the basal diet only,broilers in treatment group 1,2,3 were fed diets added organic rare earth 400mg,600mg/kg,and 730 organic complex feed additive of 0.5% into the basal diets resp,and a feeding experiment was conducted with them for 38 days.The results showed that the average gain of treatment group 1,2,3 were 8.6,10.6 and 10.1 Percent point higther than that of the centrol group successively;the feed consumption per kg gain of the treatment groups was 9.5,11.4 and 15.1 percent points less than that of the control group resp,and there were a significant difference (P<0.05) between the treatment group 1 and the centrol group and highly significant differences(P<0.01)between treatment group 2,3 and the control group by F test and multiplex comparison.Survival rates of 3 treatment groups were 1.6,3.3,1.6 percent points higher sucessively than that of the control group.The economic benifits of 3 treatment groups were all higher than that of the control group,but the best one belonged to the treatment group 2. \ \