In order to investigate influence of DHA compound additives in diets on egg quality and pro- duction performance, 96 Hy-Line layers were divided into 4 groups at random, and each group consisted of 6 cages with 4 laying hens per cage. Group Ⅰ was control group and fed with basal diet. GroupsⅡ - Ⅳ were experimental groups and fed increasing levels of DHA compound additives at 2% ,4% and 8% respectively. Results showed that average laying rate, average egg shape index and average feed/egg ratio of all groups were not significantly different （...
