Table 2. Total alkane concentration at the three analysed compartments during the incubation of sandy and silty soil microcosms with maize and pea litter.
| Compartment | Time |
Maize |
Pea |
||
|---|---|---|---|---|---|
| Sandy soil | Silty soil | Sandy soil | Silty soil | ||
| Litter (μg g−1) | FM | 183.4 (22.0) | 183.4 (22.0) | 6544.8 (2013.4) | 6544.8 (2013.4) |
| T1 | 29.9 (ND) | 169.3 (ND) | 7524.3 (ND) | 6021.0 (ND) | |
| T2 | 26.3 (ND) | 36.4 (ND) | 881.3 (ND) | 3705.9 (ND) | |
| T3 | 25.4 (ND) | 56.6 (ND) | 2111.4 (ND) | 1428.5 (ND) | |
| Interface (0-1 mm) (ng g−1) | T1 | 52.0 (13.0) | 46.0 (2.0) | 52.0 (16.0) | 50.0 (6.0) |
| T2 | 39.0 (15.0) | 36.0 (1.0) | 66.0 (31.0) | 47.0 (4.0) | |
| T3 | 49.0 (12.0) | 105.0 (29.0) | 81.0 (17.0) | 96.0 (27.0) | |
| Bulk soil (ng g−1) | T0 | 167.0 (52.0) | 206.0 (ND) | 167.0 (52.0) | 206.0 (ND) |
| T1 | 67.0 (26.0) | 52.0 (6.0) | 78.0 (7.0) | 40.0 (5.0) | |
| T2 | 128.0 (6.0) | 39.0 (9.0) | 71.0 (3.0) | 48.0 (14.0) | |
| T3 | 120.0 (40.0) | 74.0 (2.0) | 79.0 (22.0) | 108.0 (24.0) | |
Sampling time points for bulk soil were at the beginning (T0) and after 2 (T1), 8 (T2) and 30 (T3) weeks of incubation. Besides the fresh litter material (FM), litter has been also analysed at T1–T3. Samples from the soil–litter interface have been analysed from time points T1–T3. Note that concentrations are given in μg g−1 (litter samples) or ng g−1 (soil samples), respectively. Standard deviations are given in brackets (n=3). As the amount of remaining litter material was too low for single measurements at T1, T2 and T3 litter material was pooled from the three replicates; thus no standard deviation is given (ND).