. 2023 Feb 10;9(2):e13668. doi: 10.1016/j.heliyon.2023.e13668

Table 2.

Correlation between the α-diversity of bacterial communities and environmental factors.

Factors	Shannon	Inv-Simpson	Observed-richness	chao1
TN	−0.421^a	−0.322^a	−0.466^a	−0.489^b
TP	−0.464^a	0.404^a	0.471^a	−0.518^a
NH₃–N	0.173	0.163	0.145	−0.026
NO₃–N	−0.726^a	−0.629^a	−0.755^a	−0.701^a
AP	−0.147	−0.130	−0.208	−0.275
AK	0.067	0.012	0.131	0.399
SOM	−0.328^a	−0.35^a	−0.308^a	−0.007
c (CAP)	0.070	0.058	0.079	0.086

a Values represent means based on soil samples. TN: total nitrogen; TP: total phosphorus; NO₃–N: nitrate nitrogen; NH₃–N: ammonia nitrogen; AP: available phosphorus; AK: available potassium; SOM: soil organic matter; c(CAP): concentration of CAP.

Correlation is significant at 0.01 level (2-tailed).

Correlation is significant at 0.05 level (2-tailed).