Fig. 2

Rumen microbial composition and differences. (A) Rumen microbial Venn chart; (B) ANOSIM analysis chart between two groups; (C) Differences between CCK and CEO at the genus level; (D) Dominant strains of CCK and CEO at the species level; CCK: castrated bulls with basal diet group; CEO: castrated bulls with the same diet adding to 20 g per steer/day oregano essential oil (n = 6)