不同水平藜麦对肉鸡生长性能、肠道健康及血清指标的影响OA

The experiment aimed to investigate the effects of different supplementation levels of quinoa on the growth performance,intestinal health,and serum indices in broilers.A total of 480 healthy one-day-old AA broiler chicks were randomly divided into four groups,with six replicates per group and 20 chicks per replicate.The control group(group C)was fed a basal diet,and the experimental groups replaced corn in the basal diet with quinoa at equal proportions of 5%(group Q1),10%(group Q2),and 15%(group Q3).The test period lasted for 42 days.The results showed that compared with group C,the body weight at 21 and 42 days of age in group Q2 was significantly increased(P<0.05).During 1 to 21 days,22 to 42 days,and 1 to 42 days,the average daily gain(ADG)was significantly increased(P<0.05),and the feed-to-gain ratio(F/G)was significantly decreased(P<0.05).The villus height(VH)of the duodenum and jejunum in group Q2 was significantly increased(P<0.05),the villus height-to-crypt depth ratio(V/C)of the duodenum and ileum was significantly increased(P<0.05),and the crypt depth(CD)was significantly decreased(P<0.05).The counts of Enterococcus and Escherichia coli in the cecal contents of group Q2 were significantly decreased(P<0.05),while the counts of Bifidobacterium and Lactobacillus were significantly increased(P<0.05).The serum concentrations of immunoglobulin G(IgG),immunoglobulin A(IgA),tumor necrosis factor-α(TNF-α),interferon-γ(IFN-γ),interleukin-2(IL-2),and interleukin-6(IL-6)in group Q2 were significantly increased(P<0.05).The serum concentrations of low-density lipoprotein cholesterol(LDL-C),triglyceride(TG),and total cholesterol(TC)in group Q2 were significantly decreased(P<0.05),while the high-density lipoprotein cholesterol(HDL-C)content was significantly increased(P<0.05).The serum total antioxidant capacity(T-AOC),glutathione(GSH)content,and the activities of glutathione peroxidase(GSH-Px),catalase(CAT),superoxide dismutase(SOD),and total superoxide dismutase(T-SOD)in group Q2 were significantly increased(P<0.05),whereas the malondialdehyde(MDA)content was significantly decreased(P<0.05).The study shows that appropriate dietary quinoa supplementation can improve growth performance,optimize intestinal morphology and microbiota structure,and enhance immune function and antioxidant capacity in broilers,with the 10%quinoa supplementation level showing a better effect.