Slow Release Diammonium Phosphate (DAP)

Description

High-Efficiency Slow Release DAP

Slow Release DAP is an upgraded diammonium phosphate fertilizer designed to improve nutrient efficiency and reduce fertilizer loss compared with traditional DAP. Manufactured in China by Shandong Aolansu, it is engineered for modern agriculture, providing controlled nutrient release, reduced application frequency, and improved crop performance.

Advanced Controlled Release Technology

The product uses gelatin/PVA composite coating technology, forming a semi-permeable film around fertilizer granules. This allows nutrients to be released gradually according to soil moisture and crop demand, reducing leaching and volatilization. The slow-release period ranges from 30 to 120 days, depending on crop requirements.

High Nutrient Content & Stability

Slow Release DAP contains ≥64% total nutrients (N + P₂O₅), including nitrogen ≥18% and available phosphorus ≥46%. It meets GB 10205-2009 and international standards. The product has low moisture (≤2.0%), uniform granules, and strong anti-caking performance for easy storage and application.

Wide Agricultural Applications

Suitable for rice, wheat, corn, vegetables, fruit trees, and cash crops. It performs well in acidic, neutral, and slightly alkaline soils. It can be applied as basal fertilizer or single application, significantly reducing the need for multiple topdressings and lowering labor costs.

Product Specifications

Parameter	Specification
Product Name	Slow Release DAP (Diammonium Phosphate)
CAS No.	7783-28-0
Molecular Formula	(NH₄)₂HPO₄
Appearance	White/light gray uniform granular, 2-4mm, coated, no foreign impurity
Total Nutrient (N+P₂O₅)	≥64%
Total Nitrogen (N)	≥18%
Available Phosphorus (as P₂O₅)	≥46%
Water-Soluble Phosphorus	≥90%
Moisture Content	≤2.0%
pH Value	7.5-8.5 (Weakly Alkaline)
Slow Release Period	30-120 days (adjustable)
Coating Material	Gelatin/PVA composite material, biodegradable
Package	50kg PP woven bag with PE inner lining, bulk
Storage Condition	Dry, ventilated, cool, away from moisture and alkaline substances

FAQ

Q1: What is the difference between Slow Release DAP and ordinary DAP?
A1: The biggest difference lies in the slow-release performance. Our Slow Release DAP adopts gelatin/PVA composite coating technology, which can realize slow and continuous release of nutrients, with a slow-release period of 30-120 days, reducing topdressing times and improving nutrient utilization rate. Ordinary DAP releases nutrients quickly, which is easy to cause nutrient loss and requires frequent topdressing. Shandong Aolansu’s factory has carried out a lot of field tests to verify the advantages of slow release DAP in practical application.

Q2: What crops is Slow Release DAP suitable for?
A2: It has strong versatility and is suitable for almost all crops, including food crops such as rice, wheat and corn, cash crops such as cotton, oilseeds and vegetables, and fruit trees such as apples, pears and citrus. It is especially suitable for large-scale planting bases and areas with inconvenient topdressing, which can greatly save labor costs.

Q3: Why choose Shandong Aolansu as your China supplier for Slow Release DAP?
A3: We are a professional China manufacturer with our own factory, focusing on Slow Release DAP production for many years. We have advanced coating production lines and strict quality control system, ensuring stable product quality and reliable slow-release effect. We provide factory-direct prices, sufficient stock, timely delivery and complete export documents, which can fully meet your bulk procurement needs.