Types of microbes
In CK and NR (relative abundance: NR > R) In R (relative abundance: R > NR)
General characteristics
Autotrophic bacteria containing cbbL
Gammaproteobacteria was the main class. The correlation between relative abundance and soil salinity was positive and significant. Gammaproteobacteria was the main class. In moderate and low salinity soils, Betaproteobacteria and Alphaproteobacteria also had large relative abundance. Community diversity and richness: NR > R. Relationship between relative abundance and pH: negative correlation (r<-0.6). Soil environments with sufficient oxygen and low CO2 concentration were conducive to survival.
Autotrophic bacteria containing cbbM
Gammaproteobacteria and Alphaproteobacteria were the main classes. Relationship between relative abundance of Betaproteobacteria and salinity: significant negative correlation. Betaproteobacteria and Alphaproteobacteria were the main classes. Relationship between relative abundance of Gammaproteobacteria and salinity: significant negative correlation. Community diversity and richness: R > NR. Relationship between relative abundance and pH: negative correlation (r<-0.5). Soil environments with low oxygen and high CO2 concentration were conducive to survival.
Nitrogen-fixing bacteria containing nifH
Gammaproteobacteria and Deltaproteobacteria were the main classes. Relationship between relative abundance and salinity: significant positive correlation. Betaproteobacteria and Alphaproteobacteria were the main classes. Relationship between relative abundance and salinity: significant negative correlation. Community diversity and richness: R > NR. Relationship between relative abundance and pH: negative correlation (r<-0.5). Soil environments with low oxygen were conducive to survival.