Table 4.

Characteristics of soil bacterial richness and diversity indexes in the rhizosphere soil of maize (M) and rice (R) in different saline–alkali fields.

Sampling Sites	Shannon index	ACE index	Chao1 index	Coverage	Simpson index
M1	7.54	34,852	23,036	0.94	0.01
M2	7.31	17,410	12,868	0.95	0.03
M3	7.02	15,948	10,885	0.93	0.05
P1	8.00	32,016	21,388	0.94	0.01
P2	7.70	29,489	20,566	0.93	0.02
P3	7.08	19,368	11,617	0.95	0.05