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Effect of dietary berberine supplementation on the α-diversity of cecal microbiota in yellow-feathered broilers. (A) Venn diagram of OTU. (B) Chao 1. (C) Shannon index. ∗indicates a significant difference at P < 0.05. Abbreviations: BBR, berberine supplementation at 250 mg/kg; NC, negative control without in-feed antibiotics; PC, positive control with in-feed antibiotics 200 mg/kg of oxytetracycline calcium and 250 mg/kg of nasiheptide.
