Table 2. Correlations (P-values) between soil properties or plant yield and signal intensities of functional genes by Mantel analysis of surface (0–5 cm) soil samples.

Gene/enzyme	Functional process	NO3-N	NH4-N	TN	TC	C/N	Yield
All detected		0.091	0.272	0.293	0.431	0.275	0.126
ara (fungi)	C degradation	0.201	0.619	0.064	0.063	0.700	0.018
Cellobiase	C degradation	0.543	0.077	0.780	0.753	0.781	0.026
Endochitinase	C degradation	0.603	0.605	0.863	0.539	0.014	0.421
Glucoamylase	C degradation	0.648	0.935	0.301	0.193	0.295	0.023
mnp	C degradation	0.503	0.637	0.031	0.064	0.538	0.025
nasA	N reduction	0.372	0.662	0.047	0.032	0.252	0.000
norB	Denitrification	0.278	0.687	0.189	0.076	0.129	0.028
nosZ	Denitrification	0.643	0.302	0.090	0.108	0.065	0.044
nrfA	N reduction	0.595	0.619	0.606	0.359	0.028	0.358
cnrC	Cobalt and nickel	0.611	0.354	0.491	0.519	0.625	0.017
cueO	Copper	0.481	0.727	0.051	0.022	0.183	0.062
metC	Mercury	0.008	0.049	0.885	0.942	0.370	0.771
terD	Tellurium	0.901	0.579	0.104	0.039	0.337	0.169
amiE	Aromatics	0.241	0.045	0.884	0.824	0.311	0.911
arhA	Aromatics	0.003	0.060	0.483	0.516	0.592	0.380
bclA	Aromatics	0.203	0.365	0.049	0.072	0.811	0.021
benD	Aromatics	0.015	0.073	0.988	0.975	0.463	0.983
bphA	Aromatics	0.382	0.042	0.916	0.827	0.541	0.414
cymA	Aromatics	0.550	0.617	0.685	0.240	0.025	0.626
dfbA	Aromatics	0.244	0.655	0.068	0.027	0.054	0.025
hcaACD	Aromatics	0.164	0.047	0.798	0.756	0.861	0.969
hdnO	Aromatics	0.005	0.129	0.559	0.684	0.574	0.692
nagG	Aromatics	0.464	0.585	0.093	0.073	0.164	0.027
nbaC	Aromatics	0.327	0.312	0.053	0.059	0.155	0.042
phdCI	Aromatics	0.920	0.580	0.954	0.828	0.026	0.156
pheA	Aromatics	0.474	0.112	0.022	0.108	0.597	0.267
tmoABE	Aromatics	0.787	0.923	0.666	0.372	0.029	0.261
tphA	Aromatics	0.444	0.688	0.283	0.186	0.016	0.003
tutFDG	Aromatics	0.021	0.019	0.428	0.676	0.784	0.876
xylC	Aromatics	0.548	0.968	0.094	0.156	0.851	0.046
mauAB	Herbicides	0.262	0.390	0.066	0.054	0.630	0.044
pcpB	Herbicides	0.163	0.033	0.991	0.998	0.760	0.792
chnE	Hydrocarbons	0.587	0.986	0.086	0.034	0.213	0.276
cpnA	Hydrocarbons	0.046	0.246	0.488	0.269	0.011	0.963
xamO	Hydrocarbons	0.902	0.663	0.193	0.135	0.360	0.016
adpB	Pesticides	0.229	0.005	0.810	0.928	0.529	0.424

Abbreviations: TN, total nitrogen; TC, total carbon; C/N, TC/TN ratio.

Bold face indicates significantly (P<0.05) changed correlations.