中草药不同添加量对蛋鸡生产性能及蛋品质的影响

摘要

为了开发中草药添加剂，试验选取600羽45周龄左右的罗曼褐壳蛋鸡，随机分为5组，每组重复3次，每次重复40只，分别在各处理组的基础日粮中添加0（CK）、1％（A）、5％（B）、10％（C）、15％（D）中草药，测定不同添加量中草药对蛋鸡生产性能及蛋品质的影响。结果显示：与 CK 相比，各试验组的破蛋率、畸形率均显著下降，其中 C组最低，分别显著下降0.66、0.31个百分点，各试验组间差异均不显著；各试验组料蛋比均极显著下降，C组最低，降低了17.83％；各试验组产蛋率均极显著升高，C组最高，提高了10.93个百分点；各试验组蛋形指数、蛋壳厚度、蛋壳强度均有所增加，但差异均不显著；C组蛋黄颜色等级、蛋黄系数、哈氏单位、蛋黄比率均显著提高。表明，基础日粮中添加中草药能提高蛋鸡的生产性能、鸡蛋品质，其中以10％的添加量最佳。%In order to develop the green and safe feed additive of Chinese herbal medicines for improving egg quality,a total of 600 Roman commercial laying hens with 45-week laying age were randomly divided into five groups.The treatment was conducted for 3 repetitions for each group and 40 chickens were included in each repetition.To determine the effect of different addition amount of Chinese herbal medicines on the producing performance and egg quality of laying hens, 0(CK),1%(group A),5%(group B),10%(group C)and 15%(group D)of Chinese herbal medicines were added into basal diet of five different groups,respectively.The results showed that the broken egg rate and deformity rate of tested groups were all significantly lower than those of CK,and those of group C were the lowest,which were reduced by 0.6 6 and 0.3 1 percentage point,respectively.No significant differences of broken egg rate and deformity rate were observed within the four tested groups.Compared with CK,the feed-egg ratio of four tested groups were all significantly reduced and that of group C was the lowest,which was reduced by 17.83%.The laying rate of four tested groups were all significantly increased and that of group C was the highest,which was increased by 10.93 percentage point.While the egg shape index,eggshell thickness and eggshell strength of four tested groups were all increased to some extent,no significant differences were found.The yolk color,yolk coefficient,Haugh unit and yolk to albumen ratio of group C were all significantly increased compared with those of CK,but no significant differences could be seen within the tested groups.The results of the study were indicated that the feed additive of Chinese herbal medicines could improve the producing performance and egg quality of laying hens,and the 1 0% addition amount was found to be optimal.