Classification:Phosphate Fertilizer
CAS No.:7722-76-1
EINECS No.:231-764-5
Place of Origin:China
Process:Wet process/ /Slurry process
Shape:White granular crystal
Agricultural use:
MAP has been an important granular fertilizer for many years. It鈥檚 water-soluble and dissolves rapidly in adequately moist soil. Upon dissolution, the two basic components of the fertilizer separate again to release ammonium (NH鈧勨伜) and phosphate (H鈧侾O鈧勨伝), both of which plants rely on for healthy, sustained growth. The pH of the solution surrounding the granule is moderately acidic, making MAP an especially desirable fertilizer in neutral- and high-pH soils. Agronomic studies show that, under most conditions, no significant difference exists in P nutrition between various commercial P fertilizers under most conditions.
Growers apply granular MAP in concentrated bands beneath the soil surface in proximity of growing roots or in surface bands. It鈥檚 also commonly applied by spreading it across the field and mixing it into the surface soil via tillage. In powdered form, it鈥檚 an important component of suspension fertilizers. When MAP is made with especially pure H鈧働O鈧? it readily dissolves into a clear solution dispersed as a foliar spray or added to irrigation water. The P鈧侽鈧?equivalent content of high-purity MAP is usually 61 percent.
MAP is also known as ammonium phosphate monobasic and ammonium dihydrogen phosphate
Monoammonium phosphate (MAP) and diammonium phosphate (DAP) are excellent sources of phosphorus (P) and nitrogen (N) for high-yield, high-quality crop production. Research trials at 42 field sites in seven Corn Belt states showed an average corn yield of 162 bushels per acre with MAP and 159 with DAP. MAP (11-52-0) and DAP (18-46-0) contain about 90 percent water-soluble P, which is well above the 60 percent needed for optimum crop growth.
Since DAP contains a higher content of ammonium nitrogen, its granules can release free ammonia as they dissolve in soil solution. In acidic soils, this release of free ammonia can injure seeds if DAP is placed with or near germinating seeds. Also, the release of free ammonia results in a temporary elevation of soil pH near the fertilizer granules, which can lower the availability of certain micronutrients such as zinc and manganese. Ultimately, both MAP and DAP have an acidic effect on the soil due to the acidity created when ammonium ions convert to nitrates in the soil, but since the soil solution surrounding MAP granules remains acidic, there鈥檚 no significant release of free ammonia to injure seedlings.
1.Used as a high effective nonchloride N, P compound fertilizer in agriculture.
2. Used as a basic raw material for N, Pand K compound fertilize.
IndexesTech GradeFood Grade
Main contents (as NH4H2PO4) %鈮?/p>98.098.0
Phosphprus pentoxide (as P2O5) %鈮?/p>61.061.0
Nitrogen (as N) %鈮?/p>11.811.8
PH of 1% water solution4.4-4.84.4-4.8
Moisture %鈮?/p>0.20.2
Heavy metals (as Pb) %鈮?/p>
Arsenic (as As) %鈮?/p>
Fluoride (as F) %鈮?/p>
Insoluble in water %鈮?/p>0.100.10
1. 50kg1000kg per bag, or according to clients' request.
2.Neutral packing with white or yellow PP or PE woven bag ,or printing by clients 鈥榬equest for bulk order.
Supply Ability:
5000 Metric Ton/Metric Tons per MonthChina Monoammonium Phosphate manufacturers

  • Created: 28-08-20
  • Last Login: 28-08-20

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