Table 5.
Activities of phosphomonoesterase [MONO] and phosphodiesterase [DI] as well as phosphomono-esterase/phosphodiesterase ratios in Oe, Oa, and Ah horizons of the profiles on carbonate parent material (mean ± standard deviation, n = 3)
| Phosphomonoesterase [MONO] (pH 5.0) | Phosphodiesterase [DI] (pH 8.0) | MONO/DI | |
|---|---|---|---|
|
mg Phenol g−1 soil 3 h−1 |
mg p-Nitrophenol g−1 soil 1 h−1 |
Ratio | |
| Oe horizons | |||
| Mangfallgebirge N1 | 124.3 ± 14.3 | 2.2 ± 0.2 | 57 |
| Mangfallgebirge S1 | 37.7 ± 15.1 | 1.6 ± 0.1 | 23 |
| Tuttlingen SW | 58.8 ± 2.9 | 1.3 ± 0.0 | 45 |
| Tuttlingen NE | 28.8 ± 2.7 | 1.2 ± 0.3 | 24 |
| Bärenthal | 58.6 ± 3.3 | 1.3 ± 0.1 | 46 |
| Schänis | 48.0 ± 3.1 | 1.5 ± 0.1 | 33 |
| Oa horizons | |||
| Mangfallgebirge N1 | 53.7 ± 0.9 | 0.76 ± 0.03 | 71 |
| Mangfallgebirge S1 | 30.5 ± 0.04 | 1.3 ± 0.0 | 24 |
| Ah1 horizons | |||
| Mangfallgebirge N1 | 8.5 ± 0.2 | 0.44 ± 0.00 | 19 |
| Mangfallgebirge S1 | 8.9 ± 0.1 | 0.61 ± 0.01 | 15 |
| Tuttlingen SW | 6.5 ± 0.1 | 0.52 ± 0.00 | 12 |
| Tuttlingen NE | 5.9 ± 0.2 | 0.35 ± 0.01 | 17 |
| Bärenthal | 7.8 ± 0.0 | 0.24 ± 0.03 | 33 |
| Schänis | 4.2 ± 0.0 | 0.21 ± 0.01 | 15 |