近几年来,国家每年都要调拨我省一些进口化肥,其营养成分和外形,都与我们常见的化肥有所区别,施用时应特别注意。 1.三料磷肥:又叫重过磷酸钙。主要肥分是可溶解于水的磷酸一钙,含五氧化二磷42～52％,为过磷酸钙含磷量的2～3倍,所以也称三料磷肥。三料磷肥中含有4～8％的游离酸,吸湿性和腐蚀性也较过磷酸钙为强。 In recent years, the state every year to transfer some imported fertilizer in our province, its nutritional content and appearance, are different from our common fertilizer, the application should pay special attention. 1. Three fertilizer: also known as superphosphate. The main fertilizer is soluble in water, calcium phosphate, containing phosphorus pentoxide 42 ~ 52%, 2 to 3 times as much as phosphorus content of superphosphate, so it is also called the triple fertilizer. Sanfen phosphate contains 4 to 8% of the free acid, hygroscopicity and corrosivity is also stronger than the superphosphate.