Fig. 6

The plots of db-RDA redundancy analysis plots based on Bray‒Curtis distance algorithm. a for fungal community, b for bacterial community. Different colors or shapes of points in the plot represent different sample groups of rhizosphere soil; red arrows represent environmental factors, and the length of the environmental factor arrows can represent the degree of influence of the environmental factors on species data. CK, the control group, SDW, Erect Milkvetch, ZHMX, Alfalfa, PJC, Phyllanthus pinnatifida, NT, Lemongrass, YT, Brassica