项目 | 标准值(旱地) | ||
pH | <6.5 | 6.5~7.5 | >7.5 |
Cd | 0.30 | 0.30 | 0.40 |
Hg | 0.25 | 0.30 | 0.35 |
As | 25 | 20 | 20 |
Pb | 50 | 50 | 50 |
Cr | 120 | 120 | 120 |
Cu | 50 | 60 | 60 |