Fig. 3

Principal component analysis (PCA) POS (positive ionization mode) (A), NEG (negative ionization mode) (B), and partial least squares discriminant analysis (PLS-DA) POS (positive ionization mode) (C), NEG (negative ionization mode) (D) of rumen fluid metabolites. QC quality control samples. CON the control group cattle fed control diets (n = 4); C8, the treatment group cattle fed control diets containing glycerol monocaprylin (n = 4); C10, the treatment group cattle fed control diets containing glycerol monodecanoate (n = 4); C12, the treatment group cattle fed control diets containing glycerol monolaurate (n = 4)