| Customization: | Available |
|---|---|
| CAS No.: | 7783-28-0 |
| Formula: | (Nh4)2hpo4 |
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| Item | Standard Value |
| Product Name | Diammonium phosphate Phosphorus Fertilizer |
| Appearance | Brown Granular |
| Nitrogen Content (N) | 18% |
| Phosphorus Content (P2O5) | 46% |
| Soluble P2O5 | 42% |
| Moisture | 0.3% |
| PH Value | 7.8-8.2 |
| Particle Size | 2~4mm ≥90% |
Diammonium phosphate (DAP) is the world's most widely used phosphorus fertilizer. It's made from two common constituents in the fertilizer industry, and its relatively high nutrient content and excellent physical properties make it a popular choice in farming and other industries.
DAP fertilizer is an excellent source of P and nitrogen (N) for plant nutrition. It's highly soluble and thus dissolves quickly in soil to release plant-available phosphate and ammonium. A notable property of DAP is the alkaline pH that develops around the dissolving granule.
As dissolving DAP granules release ammonium, the seedlings and plant roots nearest the volatile ammonium can be harmed. This potential damage more commonly occurs when the soil pH is greater than 7, a condition that often exists around the dissolving DAP granule. To prevent such damage, users should avoid placing high concentrations of DAP near germinating seeds.
The ammonium present in DAP is an excellent N source and will be gradually converted to nitrate by soil bacteria, resulting in a subsequent drop in pH. Therefore, the rise in soil pH surrounding DAP granules is a temporary effect. This initial rise in soil pH neighboring DAP can influence the micro-site reactions of phosphate and soil organic matter.
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