Table 1.
Chemical properties of soil and soil solution (n = 16) and spruce (n = 16) soils.
| Beech | Spruce | stat. | |
|---|---|---|---|
| pHH2O | 3.98–4.57 | 3.92–4.33 | ** |
| Calcium (Ca2+, µmol.L−1) | 15.2 (8.7) | 9.0 (4.0) | * |
| Magnesium (Mg2+, µmol.L−1) | 25.9 (10.3) | 14.8 (4.9) | *** |
| Sulphates (SO42−, µmol.L−1) | 65.5 (28.3) | 85.4 (36.7) | * |
| Total aluminium (AlTOT, µmol.L−1) | 23.0 (11.1) | 36.3 (12.2) | ** |
| Total carbon (CTOT, mmol.g−1) | 30.3 (4.8) | 33.5 (1.3) | ** |
| Total nitrogen (NTOT, mmol.g−1) | 1.3 (0.2) | 1.3 (0.1) | ns |
| CTOT/NTOT (molar) | 23.0 (1.0) | 26.3 (1.7) | *** |
| Ammonia (NH4+, µmol.L−1) | 2.8 (2.7) | 1.0 (0.6) | ns |
| Nitrates (NO3−, µmol.L−1) | 38.2 (48.9) | 4.5 (5.7) | ** |
| Dissolved N (DN, µmol.L−1) | 66.9 (61.2) | 25.2 (10.2) | * |
| Dissolved C (DOC, µmol.L−1) | 512 (242) | 764 (378) | * |
| DOC/DN | 14.0 (9.0) | 30.7 (8.9) | *** |
| DOC/NO3− | 35.8 (39.5) | 290.0 (217.8) | ns |
Statistical significances are marked by asterisks as follows: *p < 0.05, **p < 0.01, ***p < 0.001, ns – not significant.