Table 3.

The spearman correlation analyses between the α-diversity index and soil physicochemical properties.

	Shannon index		Chao1 index
	R	p	r	P
TOC	0.234	0.240	− 0.037	0.854
TN	0.185	0.356	− 0.152	0.449
TP	0.459	0.016*	0.114	0.571
TK	0.405	0.036*	0.225	0.259
NN	0.060	0.766	− 0.102	0.613
AN	− 0.312	0.113	0.078	0.698
AP	0.538	0.004**	0.240	0.228
TS	0.027	0.892	− 0.035	0.862
pH	0.317	0.498	− 0.190	0.343

Spearman correlation table is drawn based on SPSS (SPSS 19.0; IBM Inc., Armonk, USA)⁸⁵.

r-value represents spearman correlation coefficient, between − 1 and 1, r < 0 is negative correlation, r > 0 is positive correlation *p < 0.05, **p < 0.01.