| pH值 | 施用前 | 施用后 | ||
| 样品数 | 占总样品数 | 样品数 | 占总样品数 | |
| <4.5 | 3 | 15.0% | 0 | 0.0% |
| <4.6~5.5 | 11 | 55.0% | 1 | 5.0% |
| 5.6~6.5 | 6 | 30.0% | 16 | 80.0% |
| 6.5~7.5 | 0 | 0.0% | 3 | 15.0% |
| 范围 | 4.2~6.2 | 5.5~6.8 | ||
| 平均值 | 5.26 | 6.25 | ||