Effects of Astragalus Polysaccharides on Growth Performance,Immune Organ Indices,Serum Biochemical Indices and Intestinal Morphology of Stressed Pheasants in Middle Age
This experiment was conducted to investigate the effects of dietary astragalus polysaccharides(APS)on growth performance,immune organ indices,serum immune and antioxidant indices and intestinal morphology of stressed pheasants in middle age.A total of 200 30-day-old healthy ring-necked pheasants(He-bei subspecies)with an average body weight of(466.58±9.32)g were randomly divided into 4 groups with 5 replicates per group and 10 chickens per replicate.Pheasants in the control group were fed a basal diet,and those in the experimental groups were fed the basal diet supplemented with 400(T1 group),800(T2 group)and 1 600 mg/kg(T3 group)APS,respectively.The pheasants were raised in iron cages with a feeding densi-ty of 20 chicks/m2.The levels of serum adrenocorticotropin and glucocorticoid were detected to determine the stress state.The pre-trial period lasted for 7 days and the experimental period lasted for 60 days.The results showed as follows:1)compared with the control group,the final body weight of pheasants in T2 and T3 groups was significantly increased(P＜0.05);the average daily gain in all experimental groups was significant-ly increased(P＜0.05),and the ratio of feed to gain was significantly decreased(P＜0.05).2)Compared with the control group,the tumor necrosis factor-α content in serum of pheasants in T3 group was significantly decreased(P＜0.05),and the contents of interleukin-10,immunoglobulin G and immunoglobulin A in serum were significantly increased(P＜0.05).3)Compared with the control group,the serum malondialdehyde con-tent of pheasants in all experimental groups was significantly decreased(P＜0.05),and the serum total antioxi-dant capacity was significantly increased(P＜0.05);the serum glutathione peroxidase activity in T3 group was significantly increased(P＜0.05).4)Compared with the control group,the thymus index of pheasants in all experimental groups was significantly increased(P＜0.05),and the spleen index in T2 and T3 groups was sig-nificantly increased(P＜0.05).5)Compared with the control group,the villus height and the ratio of villus height to crypt depth in duodenum and jejunum in all experimental groups were significantly increased(P＜0.05),and the above indices in T3 group were significantly higher than those in the other two experimental groups(P＜0.05).In conclusion,dietary 1 600 mg/kg APS can improve the immune function,enhance the antioxidant capacity,improve and promote intestine development of pheasants under stress,and thus enhance their growth performance.[Chinese Journal of Animal Nutrition,2024,36(12):7967-7974]
astragalus polysaccharidespheasantsgrowth performanceimmune functionantioxidant capac-ityintestine development
万方数据
维普
