Table 1: The physical and chemical characterization of soils in four study areas.
Area | CECa (cmol/kg) | TNb (g/kg) | PNc (mg/kg) | TKd (g/kg) | AKe (mg/kg) | TPf (g/kg) | OCg (g/kg) | pH |
Pingdi | 12.98 ± 2.89 | 0.87 ± 0.32 | 9.39 ± 2.25 | 24.74 ± 2.49 | 87.53 ± 6.82 | 0.36 ± 0.15 | 8.43 ± 2.84 | 7.40 ± 0.30 |
Puan | 17.68 ± 2.28 | 1.49 ± 0.22 | 8.39 ± 2.27 | 18.34 ± 1.46 | 108.04 ± 22.36 | 0.63 ± 0.15 | 13.65 ± 2.62 | 7.68 ± 0.12 |
Xingwen | 21.78 ± 5.09 | 3.50 ± 0.32 | 19.70 ± 2.23 | 3.57 ± 0.37 | 270.23 ± 90.12 | 0.05 ± 0.02 | 100.01 ± 7.17 | 6.56 ± 1.24 |
Gulin | 14.27 ± 1.63 | 2.12 ± 0.20 | 14.68 ± 3.16 | 17.27 ± 2.49 | 261.58 ± 47.84 | 0.70 ± 0.18 | 29.18 ± 4.38 | 4.53 ± 0.24 |
aCation exchange capacity (buffered); bTotal nitrogen; cThe sum of nitrate nitrogen and ammonium nitrogen; dTotal potassium; eAvailable potassium; fTotal phosphoru; gOrganic carbon.