二元复合肥—硝磷铵也称硝酸磷肥,它是由硝酸分解磷矿粉,采用冷冻法冷冻酸分解液,使硝酸钙结晶析出,过滤后的冷冻液用氨中和,再经浓缩、造粒、干燥而成。除冷冻法以外,还有混酸法和碳化法。其氮—磷(N—P_2O_5)的含量规格依次为:20—20、18—20、12—12。从国外进口的有26—14、26—13等多种规格。硝磷钹呈灰白色颗粒状,吸湿性强,易结块,所含氮其中硝态氮、铵态氮各占50％。硝态氮能被作物迅速吸收利用;铵态氮则被土壤胶 Binary fertilizer - ammonium nitrate, also known as nitrophosphate, which is decomposed by nitric acid phosphate rock, the use of frozen frozen acid decomposition liquid, the crystallization of calcium nitrate, filtered frozen liquid with ammonia and then concentrated, Granulation, made from dry. In addition to the freezing method, there are mixed acid and carbonation method. The nitrogen-phosphorus (N-P_2O_5) content specifications are: 20-20,18-20,12-12. Imports from abroad are 26-14,26-13 and other specifications. Cyanuron cytoplasm is a gray-white granular, hygroscopic, easy to agglomeration, which contains nitrogen nitrate, ammonium nitrogen each account for 50%. Nitrate can be rapidly absorbed by crops; ammonium nitrogen is soil glue