Fig. 3

The correlation network between rumen microflora and diet energy level. The correlation network analysis between microbial species abundance and rumen fermentation indexes. Spearman’s rank correlation coefficient > 0.60; p < 0.05. Different colors represent different phyla in the rumen. The size of the nodes is proportional to the relative abundance of a species; the red lines indicate a positive correlation between species, while the green lines indicate a negative correlation between species. The thickness of the lines indicate the strength of correlation