把磷矿石磨成一定细度的粉体作为磷肥直接施用,一般叫做磷矿粉肥。磷矿粉肥是一种迟效性磷肥,其大部分磷素是很难溶解和直接被作物吸收利用的。 The phosphate rock ground into a certain degree of fineness of the powder as a direct application of phosphate fertilizer, commonly known as phosphate fertilizer. Phosphate fertilizer is a late-type phosphate fertilizer, most of which is insoluble in phosphorus and directly absorbed by crops.