Table 1.
Characteristics of six experimental soils.
| Soils | Land Status | pH | TN | A-P | OM | CEC | A-Ca | A-K | A-Na | TCd | A-Cd |
|---|---|---|---|---|---|---|---|---|---|---|---|
| g·kg−1 | mg·kg−1 | g·kg−1 | cmol(+) kg−1 | mg·kg−1 | mg·kg−1 | mg·kg−1 | mg·kg−1 | mg·kg−1 | |||
| Soil 1 | Farmyard close to a smelting plant | 6.57 | 3.28 | 232 | 23.4 | 7.5 | 619 | 152 | 41.1 | 2.55 | 1.60 |
| Soil 2 | Cropland close to a smelting plant | 4.90 | 1.80 | 570 | 31.8 | 2.7 | 136 | 77.8 | 28.9 | 1.69 | 1.21 |
| Soil 3 | Farmland around a smelting plant | 5.83 | 1.03 | 502 | 36.2 | 3.9 | 377 | 126 | 62.7 | 2.97 | 1.87 |
| Soil 4 | Paddy around a coal-fired power plant | 6.49 | 2.10 | 632 | 17.3 | 2.3 | 382 | 52.3 | 22.7 | 2.65 | 1.50 |
| Soil 5 | Farmland irrigated with polluted water from mine | 5.92 | 1.45 | 341 | 9.6 | 0.4 | 219 | 46.4 | 11.0 | 0.38 | 0.15 |
| Soil 6 | Nutrition soil covering on amended mineral slag | 7.77 | 2.50 | 298 | 39.7 | 10.3 | 1231 | 75.0 | 15.7 | 20.8 | 2.02 |
Note: OM: organic matter; CEC: cation exchange capacity; Total N/Cd: soil total concentration of N/Cd; A-P/Ca/K/Na/Cd: soil available P/Ca/K/Na/Cd.