Table 1.
Physico-chemical soil parameters (mean and standard deviation) in autumn 2012 and in spring 2013
| Variable | Tree species | Autumn 2012 | Spring 2013 |
|---|---|---|---|
| Org. matter (MO) (g kg−1) | Salix alba | 20.51 c (0.79) | 26.62 c [↑] (1.29) |
| Salix caprea | 9.53 b [↑] (0.60) | 7.01 a (0.59) | |
| Betula pendula | 9.33 (0.61) a | 10.2867 (0.75) b | |
| C org. (g kg−1) | S. alba | 20.51 b [↑] (0.95) | 10.67 b (1.58) |
| S. caprea | 9.53 a [↑] (0.03) | 4.44 a (0.13) | |
| B. pendula | 9.33 a [↑] (0.10) | 3.81 a (0.20) | |
| N total (g kg−1) | S. alba | 0.73 a (0.04) | 0.90 c [↑] (0.04) |
| S. caprea | 0.41 a [↑] (0.01) | 0.20 a (0.00) | |
| B. pendula | 0.20 a (0.0099) | 0.26 b [↑] (0.0074) | |
| C/N | S. alba | 14.64 b (0.45) | 17.76 a [↑] (0.99) |
| S. caprea | 10.87 a (0.24) | 17.61 a [↑] (0.86) | |
| B. pendula | 18.78 c (1.27) | 17.91 a (0.25) | |
| pH-H2O | S. alba | 7.73 a [↑] (0.11) | 7.45 a (0.05) |
| S. caprea | 8.10 b (0.00) | 8.07 b (0.06) | |
| B. pendula | 8.50 c [↑] (0.00) | 7.87 c (0.06) | |
| pH-1 M KCl | S. alba | 7.57 a (0.15) | 7.35 b (0.05) |
| S. caprea | 7.80 b (0.00) | 7.73 a (0.06) | |
| B. pendula | 8.00 c (0.00) | 7.70 a (0.00) | |
| CaCO3 (g kg−1) | S. alba | 5.07 a (0.11) | 10.65 b [↑] (0.15) |
| S. caprea | 19.57 b [↑] (0.76) | 10.50 a (0.20) | |
| B. pendula | 46.03 c (1.62) | 43.23 c (2.16) | |
| Na+ (mg l−1) | S. alba | 101.8 (2.7) | 433.7 (11.5) |
| S. caprea | 33.0 (0.9) | 257.7 (6.8) | |
| B. pendula | 89.7 (2.4) | 280.2 (7.4) | |
| Ca2+ (mg l−1) | S. alba | 287.5 (7.6) | 385.1 (11.6) |
| S. caprea | 60.8 (2.7) | 197.0 (8.6) | |
| B. pendula | 168.2 (7.0) | 89.9 (3.5) | |
| K+ (mg l−1) | S. alba | 205.7 (7.4) | 174.3 (6.1) |
| S. caprea | 33.1 (1.3) | 53.2 (1.9) | |
| B. pendula | 48.1 (2.1) | 33.9 (1.0) | |
| Mg2+ (mg l−1) | S. alba | 34.9 (0.7) | 62.4 (1.9) |
| S. caprea | 8.77 (0.3) | 23.8 (1.0) | |
| B. pendula | 15.9 (0.7) | 14.0 (0.5) | |
| Fe2+ (mg l−1) | S. alba | 1.22 (0.0) | 0.87 (0.0) |
| S. caprea | 0.98 (0.0) | 0.99 (0.0) | |
| B. pendula | 1.25 (0.0) | 1.13 (0.0) | |
| Cl− (mg l−1) | S. alba | 716.5 (29.3) | 1600 (80.2) |
| S. caprea | 160.0 (4.4) | 628.0 (31.3) | |
| B. pendula | 401.0 (7.8) | 590.0 (12.1) | |
| SO4 2− (mg l−1) | S. alba | 283.9 (6.9) | 69.8 (3.4) |
| S. caprea | 53.4 (1.7) | 290.1 (9.6) | |
| B. pendula | 146.4 (6.6) | 109.6 (2.4) | |
| HCO3 − (mg l−1) | S. alba | 16.3 (1.0) | 11.4 (0.3) |
| S. caprea | 8.1 (0.2) | 9.8 (0.6) | |
| B. pendula | 12.2 (0.3) | 8.9 (0.3) |
The content of the components in a saturated extract. The data represent the mean of nine replicates ± SD. The mean values of each parameter within the given column marked with the same letter do not differ significantly (p < 0.05)
“[↑]” significantly higher level of rhizosphere soil parameter observed between the seasons