Table 1.
Soil | Solonetz | Farmland |
---|---|---|
Exchangeable sodium percentage (ESP, %) | 26.9*** | 0.511 |
Exchangeable Na+ (ENa, cmolc·kg−1) | 20.8*** | 0.376 |
Soil pH | 9.64*** | 7.76 |
Soil bulk density (SBD, g·cm−3) | 1.38** | 1.24 |
HCO3− (mmol·L−1) | 3.94** | 1.36 |
CO32− (mmol·L−1) | 6.79*** | 0.00 |
Microbial biomass carbon (MBC, mg·kg−1) | 62.8 | 194*** |
Microbial biomass nitrogen (MBN, mg·kg−1) | 19.4 | 29.1** |
MBC/MBN | 3.26 | 6.70*** |
Cation exchange capacity (CEC, cmolc·kg−1) | 77.2** | 73.4 |
Total carbon (TC, mg·g−1) | 13.6 | 13.5 |
Total nitrogen (TN, mg·g−1) | 0.393 | 0.872*** |
TC/TN | 34.7*** | 15.5 |
Available phosphorus (AP, g·kg−1) | 6.57 | 25.5*** |
Available potassium (AK, mg·kg−1) | 171** | 155 |
Archaeal amoA gene abundance (106 copies g−1) | 3.35 | 495*** |
Bacterial amoA gene abundance (107 copies g−1) | 17.0 | 330*** |
Nitrification potential (NP, μg N g−1 day−1) | 23.5* | 17.1 |
Significance levels are *p < 0.05, **p < 0.01, and ***p < 0.001.