In modern agricultural production, the NPK fertilizer production line is central to making compound fertilizers. The choice of raw materials directly affects product quality and production efficiency.

1.Traditional Mineral Raw Materials
Nitrogen (N) Sources: Urea, ammonium sulfate, ammonium nitrate, ammonium chloride, etc.
Phosphorus (P) Sources: Single superphosphate, triple superphosphate, phosphate rock powder, etc.
Potassium (K) Sources: Potassium chloride, potassium sulfate, potassium nitrate, etc.
These traditional mineral materials have high purity and stable nutrient content. They are the most commonly used basic materials for NPK fertilizer production lines, suitable for large-scale, standardized production.
2.Organic Waste
Livestock and Poultry Manure: Chicken manure, pig manure, cow manure, etc. After composting, these are rich in organic matter and various micronutrients.
Agricultural By-products: Crop stalks, rice husks, fruit pulp residue, etc. These can provide potassium and organic matter.
Food Processing Waste: Distiller’s grains, soybean residue, molasses, etc. These contain abundant organic nutrients.

3.Industrial By-products
Steel Mill By-products: Slag phosphate fertilizer, which can contain 15-20% phosphorus.
Power Plant Fly Ash: Contains medium elements like silicon, calcium, and magnesium.
Chemical Industry Waste: Certain nitrogen- or phosphorus-containing industrial wastes can be used as raw materials after treatment.
4.Urban Organic Waste
Sludge Compost: Municipal sludge that has undergone safe treatment.
Food Waste: Can be converted into organic fertilizer material after professional processing.
Garden Waste: Branches, fallen leaves, etc., used after shredding and composting.

By using a diverse range of raw materials, NPK fertilizer production lines can produce compound fertilizer products that meet the needs of different crops and are competitive in the market.