Table 2 Correlations between soil microbial communities and soil enzyme activities under EOM addition.

Treatment	Index	PLFA of soil microbial communities
Treatment	Index	G+	G−	Actinomycetal	Fungal	Bacterial	AMF	F/B	G+/G−
Without pig manure	Cellulase	ns	ns	ns	ns	ns	ns	− 0.63*	0.68*
	BG	0.66*	ns	ns	ns	ns	0.68*	− 0.74**	0.87**
	Urease	ns	ns	ns	ns	ns	0.61*	− 0.80**	0.75**
	NAG	ns	ns	ns	ns	ns	0.58*	− 0.72**	0.78**
	AcP	ns	ns	ns	ns	ns	ns	ns	ns
With pig manure	Cellulase	ns	ns	ns	ns	ns	ns	ns	ns
	BG	0.74**	0.68*	0.59*	ns	0.73**	ns	ns	ns
	Urease	Ns	ns	ns	ns	ns	ns	ns	ns
	NAG	ns	ns	ns	ns	ns	ns	ns	ns
	AcP	0.60*	0.59*	ns	ns	0.60*	ns	ns	ns

Significant values are in bold.
G+ Gram-positive bacteria, G − Gram-negative bacteria, AMF arbuscular mycorrhizal fungi, F/B the ratio of fungal to bacterial, G+/G− the ratio of Gram-positive bacteria to Gram-negative bacteria, BG β-1,4-glucosidase, NAG N-acetyl-β-Dglucosaminidase, AcP acid phosphomonoesterase.
*Significant correlation at 0.05 level (both sides), **significant correlation at 0.01 level (both sides), ns: no-significant.

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