用硫酸分解磷灰石制得的称为普通过磷酸钙，简称普钙，主要成分为一水磷酸二氢、无水硫酸钙和少量磷酸，含有效 磷14% ～ 20% ，其中80%～95%溶于水，属水溶性速效磷肥，可直接作磷肥，也可用于制复合肥料。 普钙是全元素绿色肥料，是世界上最早生产的一种磷肥，也是我国应用比较普遍的一种磷肥，为植物提供磷、硫、钙、镁等多种元素，具有改良碱性土壤的作用，能促进植物的发芽、长根、分枝、结实及成熟，可用作生产复混肥的原料
Ordinary superphosphate is made by decomposing apatite with sulfuric acid, which is called common superphosphate. Its main components are dihydrogen phosphate monohydrate, anhydrous calcium sulfate and a small amount of phosphoric acid. It contains 14%~20% available phosphorus. Among them, 80%~95% are soluble in water. It is a water-soluble and quick-acting phosphate fertilizer. It can be directly used as phosphorus fertilizer and can also be used to make compound fertilizer. Pure calcium is a kind of green fertilizer with all elements. It is the earliest phosphorus fertilizer produced in the world. It is also a kind of phosphorus fertilizer widely used in China. It provides plants with phosphorus, sulfur, calcium, magnesium and other elements. It can improve alkaline soil, promote plant germination, long roots, branching, fruiting and maturity, and can be used as a production compound. Fertilizer raw materials.