Table 1 Soil properties at various profile depths in the WLF zone of the TGR region
|  | Depth (cm) | pH | TN (g/kg) | TC (g/kg) | NH4+ (mg/kg) | NO3− (mg/kg) | NO2− (mg/kg) | MC (%) | C/N |
|---|---|---|---|---|---|---|---|---|---|
Natural WLF zone | 0–5 | 6.79 ± 0.32a | 0.80 ± 0.09a | 13.07 ± 5.11a | 1.76 ± 0.33a | 17.85 ± 13.42a | 0.05 ± 0.01a | 17.00 ± 2.34a | 16.85 ± 8.03a |
5–10 | 6.65 ± 0.43a | 1.03 ± 0.34a | 12.22 ± 5.24a | 1.89 ± 0.10a | 17.53 ± 2.12a | 0.05 ± 0.02a | 16.87 ± 2.07a | 13.38 ± 7.77a | |
10–20 | 6.60 ± 0.50a | 0.95 ± 0.53a | 10.57 ± 3.20a | 1.95 ± 0.06a | 8.78 ± 2.56ab | 0.07 ± 0.02a | 17.57 ± 0.74a | 14.32 ± 9.02a | |
20–30 | 6.47 ± 0.51a | 0.58 ± 0.14a | 8.67 ± 3.53a | 1.77 ± 0.22a | 4.45 ± 1.19b | 0.05 ± 0.03a | 15.97 ± 1.24a | 16.14 ± 9.04a | |
30–40 | 6.31 ± 0.80a | 0.50 ± 0.09a | 8.13 ± 4.26a | 1.56 ± 0.16a | 4.79 ± 1.25b | 0.05 ± 0.02a | 15.02 ± 0.46a | 17.88 ± 11.99a | |
Artificial WLF zone | 0–5 | 7.14 ± 0.54a | 0.83 ± 0.48a | 12.94 ± 1.00a | 1.99 ± 0.39a | 18.59 ± 12.58a | 0.08 ± 0.05a | 18.61 ± 3.41a | 21.62 ± 16.14a |
5–10 | 6.85 ± 0.62a | 0.75 ± 0.34a | 11.82 ± 2.55a | 1.86 ± 0.08a | 10.82 ± 2.97ab | 0.07 ± 0.04a | 16.97 ± 1.26a | 20.68 ± 16.23a | |
10–20 | 6.84 ± 0.66a | 0.68 ± 0.34a | 10.19 ± 2.21a | 1.89 ± 0.28a | 6.12 ± 1.46ab | 0.06 ± 0.03a | 14.70 ± 2.30a | 19.74 ± 14.31a | |
20–30 | 6.73 ± 0. 76a | 0.61 ± 0.22a | 8.65 ± 2.47a | 1.79 ± 0.11a | 5.43 ± 2.95ab | 0.06 ± 0.03a | 17.76 ± 3.90a | 16.49 ± 9.37a | |
30–40 | 6.47 ± 0.85a | 0.67 ± 0.19a | 8.74 ± 3.05a | 1.96 ± 0.19a | 8.38 ± 6.45b | 0.05 ± 0.04a | 17.46 ± 4.17a | 13.88 ± 6.06a |