Table 1 Chemical properties, microbial respiration and enzyme activities in control and restored plots.
From: Soil restoration with organic amendments: linking cellular functionality and ecosystem processes
Control | Soil + Sludge | Soil + Compost | ||||
|---|---|---|---|---|---|---|
Mean | Std | Mean | Std | Mean | Std | |
pH | 7.47 a | 0.21 | 7.64 a | 0.15 | 7.59 a | 0.88 |
Total Organic C (g 100g−1) | 2.07 a | 0.21 | 3.06 b | 0.24 | 5.66 c | 0.61 |
Total N (g 100g−1) | 0.16 a | 0.02 | 0.32 b | 0.02 | 0.49 c | 0.03 |
C/N ratio | 13.32 b | 1.64 | 9.64 a | 0.69 | 11.62 b | 0.56 |
Water-soluble C (mg C kg −1) | 329.23 a | 29.00 | 1710.35 c | 204.32 | 601.25 b | 45.88 |
Respiration (mg CO2-C kg−1 soil d−1) | 22.80 a | 2.48 | 32.45 b | 3.65 | 37.28 b | 1.58 |
β-glucosidase (μmol PNP g−1 h−1) | 5.57 a | 0.88 | 9.98 b | 1.24 | 13.63 c | 0.33 |
Cellulase (μg glucose g−1 h−1) | 197.25 a | 25.14 | 250.35 b | 17.87 | 417.02 c | 59.23 |
Lipase (μmol PNP g−1 min−1) | 0.96 a | 0.06 | 1.35 b | 0.24 | 2.35 c | 0.20 |
Phosphatase (μmol PNP g−1 h−1) | 4.50 a | 0.32 | 7.05 b | 0.51 | 10.95 c | 0.98 |
Polyphenol oxidase (mmol pyrogallol g−1 h−1) | 114.90 a | 8.59 | 146.36 b | 24.67 | 154.64 b | 12.80 |
Urease (μmol NH4+ g−1 h−1) | 1.61 a | 0.13 | 2.23 b | 0.24 | 2.95 c | 0.28 |
