Fig. 5

Microbial communities co-occurrence network and short-chain fatty acids analysis. A The intestinal microbiota in the NC group (normal stocking density fed basal diet); B The intestinal microbiota in the PC group (high stocking density fed basal diets); C The intestinal microbiota in the OA group (high stocking density fed basal diets supplemented with organic acids); The size of nodes shows the abundance of the species. Red and green lines represent positive and negative correlations, respectively (D) Concentrations of cecal short-chain fatty acids in broilers. ^a−bValues at the same index with no common superscripts differ significantly (P < 0.05)