Fig. 8

a Receiver operating characteristic (ROC) curve and the confusion matrix of the performance of the random forest model using the top 20 microbiomes based on mean decrease accuracy (only three species of bacteria were obtained). b Heatmaps display the Spearman’s correlation coefficients among rumen microbiomes, cow phenotypes, and rumen fermentation characteristics. *P < 0.05, **P < 0.01. CON control diet, BS control diet plus Bacillus subtilis, MCE control diet plus Macleaya cordata extract