Abstract:

This experiment aimed to investigate the effects of grape residue on the growth performance,antioxidant indicator,and related gene expression in broilers under oxidative stress.One hundred and twenty healthy 30-day-old Liangfeng broiler roosters with similar body weights were randomly divided into five groups:a negative control group (NC group,fed a basal diet),a positive control group (Dex group,fed a basal diet),a Dex+1% grape pomace group,a Dex+2% grape pomace group,and a Dex+4% grape pomace group,with four replicates per group.At 7 weeks of age,the positive control group and experimental group were injected with Dex to induce an oxidative stress model,while the NC group received an equal dose of normal saline.For one week,injections were administered three times a week,every other day.The experiment lasted for 35 days.The results showed that winemaking grape pomace significantly increased the ADFI of Dex-induced oxidative stress broilers;significantly enhanced serum IgM activity of broilers;significantly increased the levels of superoxide dismutase, glutathione peroxidase, total antioxidant capacity, and catalase; and significantly upregulated the relative mRNA expression of superoxide dismutase and glutathione peroxidase. In conclusion,wine grape residue can enhance broilers' immune capacity and antioxidant capacity,and effectively alleviate the stress response of broilers under Dex-induced oxidative stress.

Key words: Broiler, Grape residue, Oxidative stress, Antioxidant index, Growth performance

CLC Number: 

• S831.5