This experiment was conducted to study the effects of dietary different forms of zinc[inorganic zinc sulfate(ZnSO4)and zinc proteinate with moderate chelation strength(Zn-Prot M)]on plasma biochemical indices,antioxidant capacity and immune function of broilers.A total of 300 one-day-old male Arbor Acres broilers were fed a semi-purified diet without zinc from 1 to 13 days of age.At 14 days of age,a total of 240 broilers with similar body weight were selected and randomly divided into 3 groups with 8 replicates per group and 10 broilers per replicate according a completely randomized design.Broilers in the control group were fed a basal diet without zinc,and others in experimental groups were fed basal diets supplemented with 60 mg/kg ZnSO4 and Zn-Prot M(as zinc),respectively.The experiment lasted for 26 days.The results showed as fol-lows:1)dietary different forms of zinc had no significant effects on the albumin,triglyceride and high-density lipoprotein cholesterol contents and aspartate transaminase(AST)and alanine aminotransferase(ALT)activi-ties in plasma(P＞0.05).Compared with the control group,dietary ZnSO4 and Zn-Prot M significantly de-creased the contents of total cholesterol and low-density lipoprotein cholesterol in plasma(P＜0.05);compared with the ZnSO4 group,dietary Zn-Prot M significantly increased the contents of total protein and globulin in plasma(P＜0.05),and significantly decreased the low-density lipoprotein cholesterol content and lactate dehy-drogenase activity in plasma(P＜0.05).2)Compared with the control group,dietary ZnSO4 and Zn-Prot M significantly increased the total superoxide dismutase and copper zinc superoxide dismutase activities and total antioxidant capacity in plasma(P＜0.05),and significantly decreased the plasma malondialdehyde content(P＜0.05);compared with the ZnSO4 group,dietary Zn-Prot M significantly increased the activities of total superoxide dismutase and copper zinc superoxide dismutase in plasma(P＜0.05),and significantly decreased the plasma malondialdehyde content(P＜0.05).3)Dietary different forms of zinc had no significant effects on the contents of interleukin-6,immunoglobulin A and immunoglobulin G in plasma(P＞0.05).Compared with the control group,dietary ZnSO4 and Zn-Prot M significantly decreased the plasma interleukin-1 β content(P＜0.05);compared with the ZnSO4 group,dietary Zn-Prot M significantly increased the plasma interleukin-1βcontent(P＜0.05).In conclusion,dietary ZnSO4 and Zn-Prot M significantly affect some plasma biochemical indices,such as total protein,globulin,total cholesterol and low-density lipoprotein cholesterol contents and lactate dehydrogenase activity,enhance the antioxidant capacity and immune function of broilers,and Zn-Prot M shows better effects than ZnSC4.[Chinese Journal of Animal Nutrition,2024,36(5):2982-2991]
关键词
锌源/肉仔鸡/血浆生化指标/抗氧化功能/免疫功能
Key words
zinc sources/broilers/plasma biochemical indices/antioxidant capacity/immune function
维普
万方数据