Table 1.
Effect of diesel oil (DO) and Dactylis glomerata (Dg) on soil enzyme activity, kg d.m. soil h−1.
| Object 1 | Deh | Cat | Ure | Glu | Pac | Pal | Aryl |
|---|---|---|---|---|---|---|---|
| µmol TFF | Mol O2 | mmol N-NH4 |
mmol PNP | ||||
| C | 0.666 c | 0.098 d | 0.364 b | 0.277 c | 1.201 b | 0.160 b | 0.102 d |
| DO | 3.137 b | 0.290 c | 2.134 a | 0.334 a | 1.298 a | 0.346 a | 0.270 b |
| Dg | 2.920 b | 0.727 b | 0.235 c | 0.265 c | 0.930 d | 0.122 c | 0.244 c |
| DgDO | 5.987 a | 1.286 a | 0.387 b | 0.316 b | 1.034 c | 0.154 b | 0.659 a |
1 C—non-polluted and non-sown soil, Dg—non-polluted soil sown with Dactylis glomerata, DO—non-sown soil polluted with diesel oil, DgDO—soil polluted with diesel oil and sown with Dactylis glomerata. Homogeneous groups denoted with letters (a–d) were calculated separately for each enzyme. Deh—dehydrogenases, Cat—catalase, Ure—urease, Glu—β-glucosidase, Pac—acid phosphatase, Pal—alkaline phosphatase, Aryl—arylsulfatase, TFF—triphenyl fomazan, PNP—p-nitrophenol.