发酵棕榈粕对肉用繁殖母牛血清免疫、抗氧化指标及后肠道微生物的影响OA

The experiment aimed to investigate the effects of fermented palm kernel meal on the serum immune,antioxidant indicators,and hindgut microbiota of beef breeding cows.Ninety healthy Simmental breeding cows with similar age,parity,and crossbreeding generation were randomly divided into three groups,with three replicates per group and ten cows per replicate.The control group was fed a basal diet,the experimental group Ⅰ was fed the basal diet with 6%homemade fermented palm kernel meal replacing the concentrate,and the experimental group Ⅱ was fed the basal diet with 6%AN fermented palm kernel meal replacing the concentrate.The pre-test period was 14 days,and the formal test period was 90 days.The results showed that the serum levels of immunoglobulin G(IgG)and tumor necrosis factor-α(TNF-α),as well as the activity of glutathione peroxidase(GSH-Px),in the experimental group Ⅰ were significantly higher than those in the control group and the experimental group Ⅱ(P<0.05),while the malondialdehyde(MDA)content was significantly lower than that in the control group and the experimental group Ⅱ(P<0.05).Regarding the hindgut microbiota,the Shannon index in experimental group Ⅰ was significantly higher than that in the control group and experimental group Ⅱ(P<0.05),the relative abundance of Bacteroidetes was lower than that in the control group and experimental group Ⅱ,while the relative abundances of Actinobacteria and Ruminococcus were higher than those in the control group and experimental group Ⅱ.The study shows that replacing the concentrate in the basal diet with 6%homemade fermented palm kernel meal can enhance the immune function and antioxidant capacity of beef breeding cows,improve the diversity of the hindgut microbiota,and promote the health maintenance of beef breeding cows.