Fig. 5.

The functions of key metabolites associated with BHBA addition. (A) The relationship between rumen parameters, dietary factors, concentration gradient and the 7 modules (ME0 to ME6) of metabolites calculated by WGCNA. (B) Heat map of metabolites in the ME3 module. The color of cells from green to red corresponds to the relative expression of metabolites from low to high. The numbers on left side of the figure represent the metabolites IDs, while group names plus sample ID were labeled over figure. (C) Enrichment analysis of the metabolites in the ME3 module. BHBA = β-hydroxybutyric acid.