Figure 9

Pearson correlation between phylum (a) and genus (b) level bacterial communities and soil properties and alfalfa growth indices. SOM represents organic matter content, TN represents total nitrogen content, TP represents total phosphorus content, TK represents total potassium content, AP represents available phosphorus content, AK represents available potassium content, and MC represents soil moisture content. AH stands for alfalfa plant height, AB stands for aboveground biomass, UB stands for underground biomass. *Indicates P ≤ 0.05, ** indicates P ≤ 0.01.