ITEMS | Sstandard | Result |
1.Appearance | Black flake/ powder | Black |
2.Odor | Seaweed smell | Seaweed smell |
3.Nitrogen(N), % | / | 2.9 |
4.Phosphorus(P2O5), % | / | 0.5 |
5.Potassium(K2O), % | ≥18 | 18.7 |
6.N+P2O5+K2O, % | ≥20 | 22.1 |
7. Organic matter, % | / | 45.6 |
8.Alginic acid, % | ≥18 | 18.2 |
9. Water insoluble, % | ≤2.0 | 1.1 |
10.PH(1:250 dilution), % | 7.0-11.0 | 8.0 |
| ≤10 | <10 |
12.Cd, mg/kg | ≤10 | <10 |
13.Pd, mg/kg | ≤50 | <50 |
14.Cr, mg/kg | ≤50 | <50 |