Table 5.
Index of the effect of biostimulation with compost (IFb) on the activity of soil dehydrogenases
| Dose Pp | Incubation time, days | ||||
|---|---|---|---|---|---|
| g kg−1 DM of soil | 15 | 30 | 60 | 90 | 180 |
| Biodiesel (Bd) | |||||
| 0 | 1.549c | 0.936d | 0.600e | 2.666cd | 1.500d |
| 2 | 1.124d | 0.870d | 0.779d | 1.909d | 3.279b |
| 4 | 1.308d | 1.339c | 1.065c | 2.857c | 1.954c |
| 8 | 2.610b | 2.043b | 1.479b | 4.762b | 1.916c |
| 16 | 6.026a | 3.545a | 3.177a | 6.058a | 2.058a |
| Diesel (D) | |||||
| 0 | 1.549c | 0.936c | 0.600c | 2.666d | 1.500c |
| 2 | 1.395d | 0.788d | 0.390d | 3.081c | 1.329d |
| 4 | 1.301d | 1.015c | 0.460d | 1.925e | 1.011e |
| 8 | 2.041b | 2.093b | 0.808b | 3.837b | 2.235a |
| 16 | 2.945a | 3.229a | 1.928a | 5.035a | 2.067b |
| Fuel oil (Fo) | |||||
| 0 | 1.549c | 0.936c | 0.600c | 2.666d | 1.500a |
| 2 | 1.530c | 0.946c | 0.346d | 3.312e | 1.140b |
| 4 | 1.313d | 1.014c | 0.639c | 2.795c | 1.043c |
| 8 | 2.385b | 2.081b | 0.932b | 3.458b | 0.861d |
| 16 | 3.159a | 3.161a | 1.188a | 3.824a | 0.787e |
| Unleaded petrol (P) | |||||
| 0 | 1.549d | 0.936d | 0.600d | 2.666e | 1.500d |
| 2 | 2.031c | 1.535a | 0.639d | 3.620d | 1.615c |
| 4 | 2.623a | 1.528a | 0.687c | 4.208c | 1.890b |
| 8 | 2.193b | 1.468b | 0.862a | 5.269b | 2.048a |
| 16 | 2.129bc | 1.257c | 0.759b | 16.058a | 2.055a |
The same letter means a homogeneous group in the columns for a petroleum product (Pp)