Table 1. The physicochemical properties of soils used in the incubation experiment.
| Treatment | pH | TN g kg-1 |
TOC g kg-1 |
C/N |
NH4+-N mg kg-1 |
NO3--N mg kg-1 |
AP mg kg−1 |
AK mg kg−1 |
|---|---|---|---|---|---|---|---|---|
| CK | 8.44±0.016a | 0.67±0.04c | 8.2±0.14c | 12.3±0.38a | 3.6±0.21c | 12.8±0.2c | 3.23±0.2b | 66.7±3.4c |
| NPK | 8.19±0.012b | 0.88±0.19b | 9.7±0.26b | 11.0±0.66b | 4.1±0.02b | 49.7±1.9b | 23.8±1.0a | 96.9±5.4b |
| NPKS | 8.15±0.014c | 1.04±0.08a | 11.6±0.38a | 11.2±0.69b | 4.8±0.20a | 60.9±3.1a | 25.3±4.0a | 152.4±8.1a |
TN, total nitrogen; TOC, total organic carbon; AP, available phosphorus; AK, available potassium.
Values are mean± standard deviation (n = 3). Different letters indicate significant differences among fertilization treatments (p< 0.05).