For agricultural professionals seeking to optimize crop nutrition, understanding the differences between various phosphorus fertilizers is paramount. Among the most common are Diammonium Phosphate (DAP) and Monoammonium Phosphate (MAP). As a leading manufacturer and supplier of phosphate-based compounds, NINGBO INNO PHARMCHEM CO.,LTD. offers both high-quality DAP and MAP, ensuring farmers and distributors have access to the best nutrient solutions. This article delves into the key distinctions between DAP and MAP, helping you make an informed purchasing decision to buy the most suitable fertilizer for your specific crop and soil needs.

Understanding the Nutrient Content: N and P Ratios

The primary difference between DAP and MAP lies in their nitrogen (N) and phosphorus (P) content. Diammonium Phosphate (CAS 7783-28-0) typically boasts a nutrient analysis of 18-46-0, meaning it contains 18% nitrogen and 46% phosphate (P₂O₅). This makes DAP a highly concentrated source of both essential nutrients. On the other hand, Monoammonium Phosphate (MAP), with a common analysis of 11-52-0 or 12-61-0, offers a higher percentage of phosphate but a lower percentage of nitrogen compared to DAP. When you buy fertilizer, understanding these ratios is crucial for precise application.

Solubility and Soil pH Effects

Both DAP and MAP are highly water-soluble, ensuring rapid nutrient release into the soil for plant uptake. However, they differ in their effect on soil pH around the granule. DAP, when dissolved, tends to create a slightly alkaline environment (pH 7.5-8.0), which can temporarily increase the pH in the immediate vicinity of the granule. This can be beneficial in acidic soils. Conversely, MAP tends to create a more acidic reaction around the granule, which can be advantageous in alkaline soils. For growers looking to buy fertilizers with specific soil pH benefits, these properties are important considerations.

Application Best Practices and Recommendations

When considering where to buy your phosphate fertilizers, remember that proper application is key. Due to the higher concentration of ammonia in DAP, it's advisable to avoid placing high concentrations directly in the seed furrow, as it can cause seedling injury, especially in drier conditions or higher pH soils. MAP, being less ammoniacal, is generally considered safer for direct seed placement. However, with proper management practices and spacing, both can be highly effective. As a leading manufacturer, we provide detailed technical data sheets to guide your purchase and application decisions.

Choosing Your Supplier: Quality and Reliability Matter

Selecting a reliable supplier for your agricultural inputs is as important as choosing the right fertilizer. NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing agricultural professionals with premium quality DAP and MAP. Our products are manufactured under strict quality control measures, ensuring consistent nutrient content and physical properties. Whether you are looking to buy DAP in bulk or require specific grades of MAP, our team is ready to assist you. We pride ourselves on being a trusted manufacturer and supplier, dedicated to supporting the success of your farming operations. Contact us today for the latest pricing and to discuss your fertilizer procurement needs.

Key Takeaways for Procurement Managers:

  • DAP (18-46-0) offers higher N and P than MAP.
  • MAP (e.g., 11-52-0) provides higher P with lower N.
  • DAP creates an alkaline micro-environment; MAP creates an acidic one.
  • Avoid direct seed placement with high concentrations of DAP.
  • Ningbo Inno Pharmchem is your reliable manufacturer and supplier for both DAP and MAP, offering competitive prices and consistent quality. Inquire today to buy your essential agricultural nutrients.