Table 1. Diversity of cbbLR and nifH genes were affected by different long-term fertilizer treatments.

Treatments	cbbLR			nifH
	Diversity index	Richness index	Evenness index	Diversity index	Richness index	Evenness index
CK	3.25±0.10b	2.58±0.09b	2.26±0.07	3.12±0.09b	2.51±0.06b	2.25±0.07
MF	3.62±0.09a	3.22±0.07a	2.22±0.06	3.47±0.10a	2.76±0.08a	2.24±0.06
RF	3.47±0.10ab	3.17±0.09a	2.29±0.07	3.43±0.10ab	2.70±0.08a	2.28±0.07
OM	3.55±0.10ab	3.11±0.09a	2.31±0.07n.s.	3.35±0.10ab	2.65±0.07a	2.32±0.07n.s.

MF: Chemical fertilizer alone; RF: Rice straw and chemical fertilizer; OM: 30% organic manure and 70% chemical fertilizer; CK: Unfertilized as a control.

Values were presented as mean ± standard error.

n.s. means not significantly differences. Different lowercase letters in the same column were indicated significantly difference at p<0.05 level.