Table 1.
Descriptive statistics (mean ± SD) for the physicochemical characteristics and the germination index (GI) of distinct raw materials used in composting (n = 70)
| Parameter | Sawdust | Slaughterhouse sludge | Meal from dead pigs | Stabilizing compost |
|---|---|---|---|---|
| Humidity (%) | 53.9 ± 0.2 | 67.6 ± 0.2 | 7.4 ± 0.5 | 49.7 ± 4.1 |
| pH | 6.3 ± 0.1 | 5.4 ± 0.3 | 6.6 ± 0.1 | 6.8 ± 0.1 |
| Electrical conductivity (mS/cm) | 0.1 ± 0.1 | 1.0 ± 0.1 | 2.9 ± 0.1 | 3.5 ± 0.1 |
| Total Kjedahl N (%) | 0.3 ± 0.1 | 5.8 ± 0.1 | 8.9 ± 0.4 | 2.6 ± 0.1 |
| C/N ratio | 166.1 | 7.2 | 4.3 | 16.9 |
| Phosphorus (%) | 0.4 ± 0.1 | 2.8 ± 0.1 | 3.6 ± 0.6 | 1.9 ± 0.1 |
| GI lettuce (%) | 97.2 ± 42.2 | 0.3 | 0.0 | 0.0 |
| GI cucumber (%) | 52.2 ± 43.8 | 1.0 ± 0.1 | 0.0 | 0.4 ± 0.5 |
| GI celia (%) | 115.1 ± 20.0 | 0.0 | 1.3 ± 2.2 | 0.0 |
| GI soybean (%) | 155.7 ± 47.1 | 52.7 ± 21.7 | 20.9 ± 10.5 | 11.2 ± 4.5 |
| GI rice (%) | 119.7 ± 4.2 | 37.6 ± 9.3 | 3.0 ± 1.8 | 4.2 ± 5.9 |
| GI wheat (%) | 36.5 ± 19.5 | 5.1 ± 4.4 | 3.0 ± 1.8 | 4.5 ± 0.8 |