Table 4.

Mantel correlations between the microbial community structure and soil characteristics.

Soil parameters	AOA	AOB	nirS	nirK	nosZ	nifH
TC (g⋅kg-1)	0.36∗∗	0.41∗∗	0.34∗∗	0.27∗	0.32∗∗	0.25∗
TN (g⋅kg-1)	0.43∗∗	0.20∗	0.56∗∗	0.71∗∗	0.61∗∗	0.32∗∗
Age (years)	0.40∗∗	0.80∗∗	0.10	0.090	0.40∗∗	0.38∗∗
TP (g⋅kg-1)	-0.061	0.37	-0.037	-0.11	-0.11	-0.0034
AP (mg⋅kg-1)	0.17	0.31	-0.028	0.094	0.28∗	0.52∗∗
NH4+ (mg⋅kg-1)	0.22	0.84∗∗	0.096	0.010	0.042	0.38∗∗
NO3- (mg⋅kg-1)	-0.028	0.31∗∗	0.075	0.029	-0.051	0.35∗∗
pH	-0.038	0.26	0.20	-0.083	-0.11	0.016

Significance levels (p): ^∗p < 0.05; ^∗∗p < 0.01.