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一、前言复合肥料是肥料的发展方向,国内外已生产了多种复合肥料。因为这种肥料能发挥多营养元素的“联应效应”,提高氮磷钾的利用率,增加土壤肥力,促进植物生长和增强作物的抗逆能力,从而使作物增产。近年来,从我国大面积土壤普查情况分析,氮磷钾比例严重失调。随着农田复种指数不断提高,单位面积粮食产量增加很快,因而从土壤中带走的氮磷钾也日趋增加。农作物缺某一种元素的现象更会突出地表现出来,应该
First, the foreword Compound fertilizer is the development direction of fertilizer, at home and abroad have produced a variety of compound fertilizers. Because this fertilizer can play a “co-effect” of multiple nutrients to increase the yield of nitrogen, phosphorus and potassium, increase soil fertility, promote plant growth and enhance the resilience of crops. In recent years, from the analysis of the situation of large-scale soil survey in China, the proportion of N, P and K is seriously imbalanced. With the continuous improvement of farmland multiple cropping index, grain yield per unit area increased rapidly, so the nitrogen, phosphorus and potassium taken away from the soil also increased. Crops lacking an element of the phenomenon more prominently demonstrated, it should be