Abstract: In order to study the effect of Echinacea compound on laying hens’ production performance and blood biochemical indexes under high temperature, 250 aged 60-week Highland Brown laying hens were randomly divided into five groups:0.5% dose of Echinacea compound group, 1% dose of Echinacea compound group, 1.5% dose of Echinacea compound group, 0.04% dose of vitamin C group and control group. The results showed that the 1% dose of Echinacea compound and 1.5% dose of Echinacea compound could significantly enhance the feed intake of chickens,the egg production rate(P<0.05), lower the feed egg ratio(P<0.05),under high temperature; the vitamin C’s effect of improving the feed intake of chickens, the egg production rate, the feed egg ratio of laying hens was not significant under high temperature, but it could reduce the soft-broken egg rate and the chickens died number. Compared with the control group, the different concentrations of Echinacea compound and vitamin C could increase the serum’s GLU, TP, ALB content and ALP activity, reduce the serum’s TG, CHO concentration and AST, ALT, CK activity.

Key words: Echinacea compound; high temperature environment; production performance; blood biochemical index