Fig. 4

Impact of planting patterns on the correlation between soil properties and differential metabolites. * Correlation is significant at the 0.05 level; ** Correlation is significant at the 0.01 level; *** Correlation is significant at the 0.001 level. pH: pH contents; TC: total carbon; TN: total nitrogen; TP: total phosphorus; AN: ammonia nitrogen; NN: nitrate nitrogen; SOC: soil organic carbon; AP: available phosphorus; MBC: microbial biomass carbon; MBN: microbial biomass nitrogen; MBP: microbial biomass phosphorus.