Fig. 5

a Comparisons of the total abundance of CAZymes genes of rumen microbiomes of cows. b Comparisons of the abundance of the CAZymes gene families of the rumen microbiomes of cows. c Comparisons of the gene abundance of the CAZymes families (GH, CE, PL, and AA; CBM; GT) of the rumen microbiomes of cows; only families with significant differences among groups were shown. The Kruskal–Wallis multiple comparisons was used for mean comparison, and the P value < 0.05 indicated the significant difference. CON control diet, BS control diet plus Bacillus subtilis, MCE control diet plus Macleaya cordata extract