TABLE 1.
Biological, chemical, and physical characteristics of the soil in the two areas sampled
| Characteristica | Value (mean ± SE)b |
|
|---|---|---|
| Gypsum area | Marly-limestone area | |
| Alkaline phosphatase (μmol PNP g−1 h−1) | 0.89 ± 0.12 A | 0.31 ± 0.06 B |
| Dehydrogenase (μg INTF g soil−1) | 30.66 ± 2.60 A | 37.66 ± 4.85 A |
| Protease (μmol NH4+ g−1 h−1) | 0.09 ± 0.02 A | 0.14 ± 0.03 A |
| β-Glucosidase (μmol PNP g−1 h−1) | 0.18 ± 0.02 A | 0.13 ± 0.03 A |
| Available P (mg kg−1) | 1.27 ± 0.4 B | 4.96 ± 0.3 A |
| EC (μS cm−1) | 2.400 ± 100 A | 2.380 ± 100 A |
| pH | 7.9 ± 0.3 A | 8.3 ± 0.2 A |
| TOC (g kg−1) | 5.5 ± 5.0 A | 4.2 ± 5.0 A |
| Total N (g kg−1) | 0.7 ± 0.2 A | 0.6 ± 0.2 A |
| WSC (μg g−1) | 68 ± 6 A | 67 ± 4 A |
| GRSP (μg g soil−1) | 31.66 ± 12.46 B | 85.96 ± 8.15 A |
| CaCO3 (g kg−1) | 216 ± 53 B | 506 ± 72 A |
| CaSO4·2H2O (g kg−1) | 434 ± 35 A | 21.8 ± 8 B |
a
INTF, iodonitrotetrazolium formazan; EC, electrical conductivity; TOC, total organic carbon; WSC, water-soluble C; GRSP, glomalin-related soil protein.
b
For 5 samples per area. Values in the same column followed by the same letter do not differ significantly (P, >0.05) as determined by the Duncan test.