目前,市场上销售的复合(混)肥、专用肥大多数含有氯。同时,农作物所需钾素的化肥来源主要是氯化钾(KCl)、硫酸钾(K_2SO_4),其中氯化钾占绝大多数。由于氯是一种微量元素,过多施用,会使作物发生氯中毒。因此在使用各种含氯化肥时,应特别注意随着肥料施用而带入土壤的氯离子(Cl~-)数量,是否对作物构成毒害。为防止农作 At present, the composite (mixed) fertilizer and specialty fertilizer sold on the market mostly contain chlorine. At the same time, the main sources of chemical fertilizers for crop potassium are potassium chloride (KCl) and potassium sulfate (K 2 SO 4), of which potassium chloride accounts for the vast majority. Since chlorine is a trace element, excessive application can cause chlorosis in the crop. Therefore, when using various kinds of chlor-containing fertilizers, special attention should be paid to the amount of chloride ions (Cl ~ -) brought into the soil with the application of fertilizers, so as to make it toxic to the crop. To prevent farming