Table 2 Soil properties of the organic and mineral horizons, as a function of regeneration treatment
| Â | Property | CON | SIN | GRP | GRPS |
|---|---|---|---|---|---|
Organic | FH thickness (cm) | 9.0 (7.5) a | 7.4 (5.4) ab | 6.6 (4.7) ab | 4.9 (3.8) b |
pH | 4.6 (0.6) | 4.5 (0.5) | 4.8 (0.4) | 4.7 (0.4) | |
C (%) | 34.9 (14.6) | 30.8 (11.5) | 32.0 (11.6) | 28.5 (9.7) | |
N (%) | 1.7 (0.7) | 1.6 (0.5) | 1.8 (0.6) | 1.6 (0.5) | |
C/N | 19.8 (4.1) a | 19.4 (3.9) ab | 17.6 (1.7) ab | 17.7 (3.8) b | |
P (mg kg−1) | 33.6 (27.0) | 26.9 (21.7) | 27.1 (17.7) | 30.0 (22.6) | |
K (mg kg−1) | 325.3 (261.1) | 217.5 (271.4) | 244.4 (146.3) | 257.0 (144.0) | |
Ca (mg kg−1) | 2008.1 (1362.3) | 2323.1 (1622.3) | 2176.8 (1434.9) | 2159.9 (1317.0) | |
Mg (mg kg−1) | 222.8 (134.4) | 251.9 (79.9) | 284.0 (237.3) | 231.1 (140.9) | |
Al (mg kg−1) | 1007.0 (856.7) | 977.1 (608.0) | 920.9 (626.0) | 1169.6 (605.5) | |
Mineral | pH | 4.6 (0.2) | 4.8 (0.3) | 4.6 (0.2) | 4.6 (0.2) |
C (%) | 4.9 (2.1) | 3.3 (1.2) | 5.0 (1.7) | 4.5 (2.3) | |
N (%) | 0.30 (0.15) | 0.21 (0.08) | 0.30 (0.10) | 0.28 (0.15) | |
C/N | 16.8 (4.4) | 16.8 (4.7) | 16.6 (2.3) | 16.7 (5.0) | |
P (mg kg−1) | 5.3 (3.4) b | 8.6 (13.4) ab | 15.6 (19.2) a | 13.8 (19.4) ab | |
K (mg kg−1) | 46.0 (18.8) | 49.0 (20.2) | 41.2 (19.5) | 39.2 (15.1) | |
Ca (mg kg−1) | 159.5 (165.2) | 274.1 (248.3) | 213.0 (170.4) | 174.1 (212.3) | |
Mg (mg kg−1) | 22.3 (16.6) | 31.2 (17.7) | 25.8 (27.5) | 22.3 (26.5) | |
Al (mg kg−1) | 1902.2 (423.0) | 1600.0 (397.5) | 1951.7 (476.8) | 1925.0 (329.4) |