Table 1.

F-value and P-value of analysis of variance for the effects of nitrogen addition, species and their interaction (nitrogen × species) on OTU, Shannon, Chao1 indices and the relative abundance of the phyla.

Fixed factors		Nitrogen	Species	Nitrogen × Species
d.f.		3	1	3
OTU	F	252.74	7.99	3.18
	P	< 0.0001	0.0143	0.06
Shannon	F	75.03	0	1.22
	P	< 0.0001	0.9624	0.3424
Chao1	F	49.09	5.20	4.41
	P	< 0.0001	0.0400	0.0239
Acidobacteria	F	146.93	13.67	11.94
	P	< 0.0001	0.0027	0.0005
Proteobacteria	F	19.53	9.94	1.04
	P	< 0.0001	0.0076	0.4057
Bacteroidetes	F	30.34	0.09	9.87
	P	< 0.0001	0.7733	0.0012
Crenarchaeota	F	72.80	0.01	11.96
	P	< 0.0001	0.9247	0.0005
Verrucomicrobia	F	4.03	10.84	0.37
	P	0.0314	0.0058	0.7754
Planctomycetes	F	6.24	1.42	3.27
	P	0.0074	0.2555	0.0559
Actinobacteria	F	4.71	5.65	4.62
	P	0.0194	0.0335	0.0207
Cyanobacteria	F	0.62	0	0.41
	P	0.6168	0.9601	0.7504
Gemmatimonadetes	F	12.42	7.81	5.34
	P	0.0004	0.0152	0.0129
Chloroflexi	F	16.22	15.54	6.55
	P	0.0001	0.0017	0.0062
Firmicutes	F	39.78	21.00	0.28
	P	< 0.0001	0.0005	0.8384
WYO	F	1.75	24.18	11.48
	P	0.2057	0.0003	0.0006
TM7	F	195.38	5.60	7.16
	P	< 0.0001	0.0341	0.0044