Fig. 8

Correlation of A rumen and B serum metabolites, and C animal performance parameters with the relative abundance of major bacterial and archaeal and protozoal (green) genera (occupying over 0.1% average relative abundance in at least one of the treatments). Correlation analyses were conducted using Spearman’s rank correlation. Only strong correlation coefficients (|r|≥ 0.6) and significant (P < 0.05) correlations were selected to be shown on the plot. BW, body weight; CH4, methane; DMI, dry matter intake; DDMI, digestible dry matter intake; NH3-N, ammonia nitrogen; Others, valerate, isovalerate, and isobutyrate; AP, acetate to propionate