随着农业科技的发展，复混肥的施用也日益普遍，在高额利润的趋使下，一些不法生产企业用低价的氯化钾代替高价的硫酸钾，或以氯化铵代替尿素及磷酸二铵、硝酸铵等生产复混肥料。在产品的外包装上又未标注含氯，致使广大农民给果树追肥时误用。果树氯中毒事件屡有发生。此类投 With the development of agricultural science and technology, the application of compound fertilizer is also increasingly common. Under the circumstance of high profits, some unscrupulous manufacturers use low-price potassium chloride instead of high-price potassium sulfate or replace ammonium chloride with ammonium chloride and Diammonium phosphate, ammonium nitrate and other compound fertilizer production. In the product packaging has not marked chlorine, resulting in the majority of farmers to misuse when the tree topdressing. Chlorosis in fruit trees have occurred frequently. Such investment