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磷肥的品种很多,可概括为三类: 第一类,为水溶性磷肥。主要有普通过磷酸钙、重过磷酸钙,肥料中的磷能溶于水。 第二类,为弱酸溶性磷肥。主要有钙镁磷肥、钢渣磷肥、偏磷酸钙、沉淀磷肥等,肥料中的磷不溶于水,但能溶于2％的柠檬酸或柠檬酸铵溶液。 第三类,为难溶性磷肥。主要有磷矿粉、骨粉,该类肥料中的磷既不溶于水也很难溶于弱酸。 一、磷肥利用率 据资料看,磷肥利用率很低,磷肥中有
Many varieties of phosphate fertilizer can be summarized into three categories: The first category is water-soluble phosphate fertilizer. Mainly ordinary superphosphate, superphosphate, phosphorus in fertilizer soluble in water. The second category is weak acid soluble phosphate fertilizer. Mainly calcium and magnesium phosphate fertilizer, steel slag phosphate fertilizer, calcium phosphate, precipitated phosphate fertilizer, fertilizer phosphorus insoluble in water, but can be dissolved in 2% citric acid or ammonium citrate solution. The third category, as insoluble phosphate. Mainly phosphate rock, bone meal, phosphorus in such fertilizers are neither soluble in water nor soluble in weak acids. First, the utilization rate of phosphate fertilizer According to the information, phosphorus utilization rate is very low, there is phosphate fertilizer