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Effects of wheat bran supplementation on microbial α-diversity in cecum on day 42. (A) Chao index, (B) Shannon index. The results were analyzed by Kruskal-Wallis H test and presented as mean values of different bacteria. ∗Means the difference was significant (P < 0.05). AGP, CON +75 mg/kg chlortetracycline (antibiotic growth promoter). Abbreviations: CON, antibiotic-free control diet; OTU, operational taxonomic units; WB, CON +3% wheat bran.
