Figure 7.

The bacterial significantly altered genera with relative abundances >1% in at least one treatment were shown. Different lowercase letters in each column denote significant differences among the samples (p < 0.05, HSD Tukey test; (A). Spearman correlation analysis between the relative abundances of dominant bacterial genera and soil physicochemical properties. r indicates the correlation coefficient; ^*p < 0.05, ^**p < 0.01. AK, available potassium; AP, available phosphorus; C/N, carbon to nitrogen ratio; SOM, soil organic matter; and TN, total nitrogen (B). CK, no cover crop; W, wheat; R, wild rocket; B, faba bean; WR, wheat + wild rocket; WB, wheat + faba bean; RB, wild rocket + faba bean; and WRB, wheat + wild rocket + faba bean.