DAP
Tag list： DAP
Category:
Product Description
Chemical Name: Diammonium Hydrogen Phosphate
Molecular formula: (NH4)2HPO4
Molecular weight: 132.0
CAS No.: 7783-28-0
EINECS: 231-987-8
▏Properties
White crystal, relative density 1.619, melting point is 155℃, water-soluble strong.
▏Composition
NO. | TEST | SPECIFICATION |
1 | Appearance | White crystal |
2 | Assay | ≥99.0% |
3 | P2O5 | ≥53.0% |
4 | N | ≥21.0% |
5 | pH(1% water solution) | 7.8-8.2 |
6 | Moisture | ≤0.2% |
7 | Insoluble in water | ≤0.10% |
8 | As | ≤0.0003% |
9 | Heavy metals | ≤0.001% |
10 | F | ≤0.001% |
11 | Fe | ≤0.002% |
▏Application method
Crops | Period | Dosage | DAP |
Wheat | Base fertilizer; Seedling stage, tillering stage | Kg/Ha | 300-375; 110-150 |
Rice | Base fertilizer; Seedling stage, tillering stage | Kg/Ha | 300-375; 75-110 |
Maize | Base fertilizer; Seedling stage, jointing stage | Kg/Ha | 260-330; 150-180 |
Cotton | Base fertilizer; Seedling stage and bolling stage | Kg/Ha | 300-375; 75-110 |
Peanut | Base fertilizer; Flowering period | Kg/Ha | 150-225; 75-110 |
Soybean | Base fertilizer; Flowering and fruiting period | Kg/Ha | 225-260; 75-150 |
Sorghum | Base fertilizer; Seedling stage | Kg/Ha | 300-450; 150 |
Potato | Base fertilizer; Squaring stage | Kg/Ha | 300-375; 150-180 |
Vegetables | Base fertilizer | Kg/Ha | 375-450 |
Watermelon | Base fertilizer; Fruiting period | Kg/Ha | 375-450; 150-180 |
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