Table 2 Correlations between environmental variables and soil microbial community functional structures assessed by partial Mantel tests.

Variables^a	Non-planting^b		Planting^c		Non-planting core^d		Increased core by planting^e
Variables^a	r	P	r	P	r	P	r	P
pH	0.442	0.015	0.673	0.000	0.237	0.135	0.025	0.305
SOM	−0.577	0.999	−0.380	0.999	−0.168	0.763	−0.287	0.999
TN	−0.619	1.000	−0.457	1.000	−0.098	0.601	−0.259	0.999
TP	−0.135	0.811	−0.295	0.983	−0.214	0.884	−0.292	1.000
TK	0.547	0.013	0.431	0.018	−0.046	0.443	−0.062	0.847
AN	−0.647	1.000	−0.393	1.000	−0.190	0.844	−0.235	0.998
AP	0.027	0.402	0.241	0.037	0.282	0.167	0.013	0.373
AK	−0.014	0.455	0.386	0.026	0.333	0.103	−0.047	0.763
NO₃-N	−0.649	0.999	−0.076	0.713	−0.155	0.811	0.051	0.173
NH₄-N	0.289	0.026	0.435	0.026	−0.160	0.753	−0.115	0.956
MSM	0.632	0.001	0.225	0.062	0.212	0.151	0.199	0.034
MST	−0.690	1.000	−0.254	0.948	−0.207	0.891	0.037	0.231
AGB	—	—	0.451	0.000	—	—	0.145	0.044
SPAD	—	—	0.345	0.000	—	—	0.764	0.000
MAT	−0.569	0.998	−0.234	0.955	−0.298	0.946	−0.363	1.000
AR	0.597	0.009	0.525	0.012	−0.018	0.441	−0.073	0.887
RH	0.527	0.014	0.459	0.018	−0.063	0.511	−0.128	0.983

^aAbbreviations: SOM, soil organic matter; TN, total nitrogen; TP, total phosphorus; TK, total potassium; AN, available nitrogen; AP, available phosphorus; AK, available potassium; MSM, mean soil moisture; MST, mean soil temperature; SPAD, chlorophyll concentration of plant leaf; AGB, aboveground biomass; MAT, mean annual temperature AR , annual rainfall; RH, relative humidity.
^bTotal detected functional genes in three soils under non-planting treatment.
^cTotal detected functional genes in three soils under planting treatment.
^dShared functional genes among three soils under non-planting treatment.
^eShared functional genes among three soils under planting treatment in which the non-planting core was removed.

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