Stepwise linear regression models showing the correlations between the bacterial average MIC from each soil and the soil factors (based on the data of the 11 soil samples).

aR2 = 0.9298 or 0.6467 shows that the average MIC was significantly correlated with the soil characters (R2>0.362, significant correlation, [32]); b variance inflation factor; c intercept. The MICSb(III) and MICCu(II) are the average bacterial MIC for the metal of each soil (µM), and the CSb, CCu, CS and CP are the soil concentrations for Sb, Cu, S and P (mg/kg), respectively.