磷肥施入土壤中,易和土壤中的活性铁、铝、钙离子发生反应,形成非水溶性或难溶性磷,而被土壤固定,降低磷肥利用率。下面介绍磷肥如何施用效益好几项科学方法: 一.合理分配和选择磷肥①要把磷肥重点分配在缺磷土壤上。②应根据土壤的酸碱性选择不同种类的磷肥。如对酸性土壤,宜分配钙镁磷肥、钢渣磷肥和磷矿粉等弱酸溶性磷肥和难溶性磷肥;对中性、石灰性 Phosphate fertilizer applied to the soil, easy and active iron, aluminum, calcium ions react to form a water-insoluble or insoluble phosphorus, and was fixed by the soil, reducing the utilization of phosphate fertilizer. The following describes how to use the benefits of phosphate fertilizer several scientific methods: I. Rational allocation and selection of phosphate fertilizer ① We should focus on the allocation of phosphate fertilizer in phosphorus-deficient soil. ② should be based on soil acid-base selection of different types of phosphate fertilizer. Such as acid soil, should be allocated calcium magnesium phosphate fertilizer, slag phosphate fertilizer and phosphate rock weak acid soluble phosphate fertilizer and insoluble phosphate; the neutral, calcareous