TABLE 1.
Kinetics, temperature optima, and pH optima of denitrification by denitrifiers in fen soil microcosms
| Depth of soil layer (cm) | In situ pH | Value in nitrate-amended soil |
Value in N2O-amended soil |
|||||
|---|---|---|---|---|---|---|---|---|
| vmax (nmol·h−1 gDW−1) | Km (μM) | Optimum temp (°C) | Optimum pH | vmax (nmol·h−1 gDW−1) | Km (μM) | Optimum temp (°C) | ||
| 0-10 | 5.2 | 24 ± 2 | 19 ± 3 | 34 | 5.5 | 83 ± 13 | 47 ± 13 | 20 |
| 10-20 | 4.8 | 9 ± 1 | 15 ± 4 | 34 | 4.5 | 105 ± 5 | 10 ± 2 | 20 |
| 20-30 | 4.7 | 3 ± 1 | 9 ± 6 | 46 | 4.2 | 40 ± 4 | 15 ± 4 | 30 |
| 30-40 | 4.8 | 1 ± 0 | 6 ± 0 | 38 | 4.3 | 19 ± 4 | 24 ± 9 | 6 |