Table 1.
Soil physicochemical and trace elements (T.E.) concentrations in the studied plots (MC, M200, M500, M700). Results are presented as mean ± standard error (n = 6). SOC: soil organic carbon, TN: total nitrogen, P2O5: available phosphorus, CEC: cationic exchange capacity, CaCO3: calcium carbonates.
| MC | M200 | M500 | M700 | |
|---|---|---|---|---|
| Clay (%) | 18.9 ± 1.1 | 21.3 ± 4.7 | 31.1 ± 1.9 | 19.5 ± 2.0 |
| Silt (%) | 69.8 ± 1.4 | 49.8 ± 9.0 | 52.2 ± 3.9 | 53.0 ± 2.5 |
| Sand (%) | 11.3 ± 0.9 | 28.9 ± 10.6 | 16.7 ± 5.2 | 27.4 ± 1.3 |
| pH | 6.2 ± 0.1 | 7.5 ± 0.5 | 7.7 ± 0.1 | 7.5 ± 0.4 |
| SOC (g kg−1) | 18.3 ± 3.7 | 16.4 ± 1.8 | 35.7 ± 1.6 | 18.2 ± 0.4 |
| TN (g kg−1) | 1.6 ± 0.1 | 1.2 ± 0.2 | 2.2 ± 0.3 | 1.1 ± 0.1 |
| P2O5 (g kg−1) | 0.1 ± 0.0 | 0.2 ± 0.0 | 0.1 ± 0.0 | 0.2 ± 0.0 |
| CEC (cmol+ kg−1) | 11.2 ± 1.2 | 16.3 ± 1.5 | 32.8 ± 2.1 | 14.9 ± 1.6 |
| CaCO3 (g kg−1) | 1.1 ± 0.2 | 7.7 ± 0.9 | 22.7 ± 2.8 | 10.2 ± 1.7 |
| Cd (mg kg−1) | 0.5 ± 0.0 | 5.1 ± 0.3 | 10.0 ± 0.8 | 15.0 ± 1.2 |
| Pb (mg kg−1) | 10.9 ± 0.8 | 203.5 ± 7.8 | 496.9 ± 12.7 | 703.8 ± 21.9 |
| Zn (mg kg−1) | 49.8 ± 3.9 | 329.0 ± 19.2 | 549.1 ± 14.2 | 1018.8 ± 27.3 |