Table 4. Correlation analysis of microbial community diversity and soil properties.

	Simpson index	Shannon index	Richness index	McIntosh index
pH	-0.395	-0.347	-0.384	-0.290
TOC/ (g·kg -1 )	0.956**	0.981**	0.947**	0.965**
TN/ (g·kg -1 )	0.679	0.572	0.625	0.448
AN/ (mg·kg -1 )	0.873*	0.921**	0.851*	0.890*
TP/ (g·kg -1 )	0.709	0.878*	0.842*	0.731
AP/ (mg·kg -1 )	0.930**	0.755	0.801	0.819
TK/ (mg·kg -1 )	0.871*	0.830	0.744	0.731
AK/ (mg·kg -1 )	0.677	0.938**	0.885*	0.711
C/N	-0.926**	-0.907**	-0.949**	-0.980**

Note:

*means P < 0.05, significant correlation;

**means P < 0.01, extremely significant correlation.