磷酸二铵与等养分重过磷酸钙加尿素的技术经济比较戴元法（上海化工研究院）世界磷肥工业自本世纪６０年代以来，主要是发展高浓度品种，并逐步取代低浓度品秤，典型品种是磷酸二铵（ＤＡＰ）和重过磷酸钙（ＴＳＰ），磷酸铵类肥料的发展速度大于重过磷酸钙。近年，磷酸二... Technical and economical comparison of diammonium phosphate and other nutrient-rich superphosphate and urea Dai Yuanfa (Shanghai Research Institute of Chemical Industry) The world’s phosphate fertilizer industry has been developing high-concentration varieties and gradually replacing low-consistency scales since the 1960s. The typical species are DAP and TSP, and ammonium phosphate fertilizers are developing faster than heavy calcium phosphate. In recent years, phosphoric acid ...