Calcium magnesium phosphate fertilizer is a raw material prepared from phosphate ore and magnesium silicate minerals. It is melted in an electric furnace, blast furnace or open hearth at 1350-1500 ℃, and the melt is quenched with water to form a glassy material with a particle size of less than 2 mm. After drying and grinding, it becomes a product. Calcium magnesium phosphate fertilizer, also known as molten magnesium containing phosphate fertilizer, is a silicate alumina glass containing phosphate ions (PO43-). The main components include Ca3 (PO4) 2, CaSiO3, and MgSiO3. It is a multi-element fertilizer with an alkaline aqueous solution that can improve acidic soil. It has a good effect as a base fertilizer when cultivating large seedlings, and plants can slowly absorb the required nutrients.

Calcium magnesium phosphate fertilizer is a gray green or gray brown powder with a phosphorus content of 12% to 18%. Its main component is α - Ca3 (PO4) 2, which is soluble in citric acid, and also contains magnesium and a small amount of silicon.