Fig. 4

Analysis of rumen microbial metabolic profile at reproductive period of different breeds of sheep. A Differential metabolite quantity statistic. B Ruminal SCFA concentration of Hu sheep. C Ruminal SCFA concentration of Suffolk. D Concentration of ruminal ammonia nitrogen content. E1, E2, E3 KEGG functional enrichment map of differential metabolites of HN_vs_HP, HP_vs_HL, and HN_vs_HL, respectively. F1, F2, F3 KEGG functional enrichment map of differential metabolites of SN_vs_SP, SP_vs_SL, and SN_vs_SL, respectively