摘要
Abstract
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.关键词
蛋鸡/中草药/生产性能/蛋品质Key words
laying hens/Chinese herbal medicines/producing performance/egg qualities分类
农业科技
