Table 2 Correlation of soil LOC content or enzyme activities with soil characteristics (n = 3). Significant correlations are indicated by *p < 0.05 or **p < 0.01 based on Pearson’s correlation analysis.

	SOC	DOC	MBC	ROC	Cellulase	Amylase	Catalase	Invertase	pH	TN	TP	TK	AP	AK	NH₄⁺–N
DOC	0.898**
MBC	0.704**	0.727**
ROC	0.466**	0.460**	0.381**					⁺
Cellulase	0.930**	0.866**	0.573**	0.434**
Amylase	0.311*	0.088	−0.073	0.022	0.380**
Catalase	0.725**	0.687**	0.619**	0.406**	0.710**	0.131
Invertase	0.570*	0.541**	0.518**	0.384**	0.491**	0.016	0.558**
pH	−0.359*	−0.308*	−0.019	−0.140	−0.464**	−0.421**	−0.366*	0.164
TN	0.850**	0.861**	0.611**	0.395**	0.884**	0.311*	0.665**	0. 524*	−0.597**
TP	0.679**	0.679**	0.423**	0.327*	0.721*	0.334*	0.423**	0.44*	−0.430**	0.862**
TK	−0.130	−0.156	−0.026	−0.088	−0.227	−0.105	−0.328*	−0.335*	0.572**	−0.179	0.171
AP	−0.201	−0.211	−0.035	−0.176	−0.254	−0.200	−0.157	0.199	0.520**	−0.329*	−0.208	0.268
AK	0.635**	0.465**	0.337*	0.249	0.635**	0.588*	0.274	0.165	−0.287	0.599**	0.609**	0.131	−0.202
NH₄⁺–N	0.575**	0.604**	0.413**	0.032	0.628**	0.508*	0.531**	0.401*	−0.741**	0.785**	0.547**	−0.491**	−0.294*	0.313*
NO₃⁻–N	0.599**	0.495**	0.244	0.040	0.679**	0.597**	0.416**	−0.540*	−0.738**	0.793**	0.728**	−0.174	−0.293*	0.715**	0.771**

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