1980年,我国化肥总产量已达1232万吨(以纯养分N+P_2O_5+K_2O计,下同),仅次于美国和苏联,名列世界第三。解放前夕,全国化肥产量总共不到六千吨,而且只有氮肥,磷钾肥工业完全处于空白。1955年,开始建立了我国自己的磷肥工厂,生产了少量过磷酸钙,此后磷肥产 In 1980, China’s total output of chemical fertilizers reached 12.32 million tons (based on pure nutrients N + P_2O_5 + K_2O, the same below), second only to the United States and the Soviet Union, ranking third in the world. On the eve of the liberation, a total of less than 6,000 tons of chemical fertilizers were produced in the country, and only the nitrogenous fertilizer, phosphorus and potassium fertilizer industries were completely in vain. In 1955, China started its own phosphate fertilizer plant, producing a small amount of superphosphate, since then phosphate fertilizer production