What's the difference between monoammonium phosphate and diammonium phosphate ?

Monoammonium phosphate and diammonium phosphate are commonly used as fertilizers in agriculture. However, when using monoammonium phosphate and diammonium phosphate, it is necessary to pay attention to their differences in order to give full play to their fertilizer efficiency.  So, what's the difference between monoammonium phosphate and diammonium phosphate?  Let's learn about it!  

Monoammonium phosphate and diammonium phosphate  

1.the content

Monoammonium phosphate: NH4H2PO4, content: agricultural grade generally in 11-44-0,10-50-0 is more common, content factories can generally be adjusted according to customer needs;  Industrial grade monoammonium 12-61-0, totally water soluble, stable in air, not easy to absorb moisture, pH 4.4-4.8, can provide water soluble phosphorus and ammonium nitrogen for plants.  

Diammonium phosphate (NH4)2HPO4, content: agricultural grade generally 18-46-0, industrial grade: 21-53-0, pH 7.8 to 8.2, can also provide water soluble phosphorus and ammonium nitrogen for plants.  

2. Ratio of nitrogen to phosphorus  

N/p ratio of monoammonium phosphate 1 :(4-5);  The n/P ratio of diammonium phosphate was close to 1:2.  Diammonium phosphate is more easily absorbed and utilized according to the optimum absorption ratio of elements by crops.  

3.PH value  

Monoammonium phosphate, dissolved in the soil PH of 4.4, is acidic, is conducive to the absorption and utilization of phosphorus crops;  Diammonium phosphate, dissolved in the soil PH of about 8.0, is alkaline;  

4. Mix with fertilizer  

Ammonium phosphate (MAP) mixed with urea can reduce ammonia volatilization loss and improve fertilizer utilization rate.  When DAP is mixed with superphosphate, it agglomerates and reduces the water solubility of p2o5. When MAP is mixed with superphosphate, the degradation degree is relatively small.