目前我国生产的氮肥,主要是碳酸氢铵,约占氮肥总量的55％。上海郊区近五年来,每年施用量在45万吨左右,占固体氮肥施用量的90％以上。由于碳铵的含氮量较低,易分解挥发,且难以粒状化和二次加工,给贮运和施用带来若干问题,因而不少人期待技术改造和改产高浓复合化肥。国外早在二十年代,就研究过碳铵的稳定性及其机理,开展了田间肥效试验,证明碳铵与其他氮肥品种等效,但均未作系统研究。近二十年来,国内对碳铵研究,大都集中在挥发特性、改变粒形、改进施用方法和提高肥效等方面,对其农化性质很少研究,因而评价往往强调缺点多, At present, China’s production of nitrogen, mainly ammonium bicarbonate, accounting for about 55% of total nitrogen fertilizer. In the recent five years in Shanghai suburbs, the annual application rate is about 450,000 tons, accounting for more than 90% of the solid nitrogen fertilizer. Due to the low nitrogen content of ammonium bicarbonate, volatile decomposition, and difficult to granular and secondary processing, storage and transportation to bring a number of problems, so many people look forward to technological transformation and conversion of high concentration of compound fertilizers. Abroad as early as the 1920s, to study the stability of ammonium bicarbonate and its mechanism, conducted a field fertilizer test to prove that the ammonium bicarbonate and other nitrogen species equivalent, but no systematic study. In the recent two decades, domestic research on ammonium bicarbonate mostly focused on volatilization characteristics, changing granularity, improving application methods and improving fertilizer efficiency. However, few studies on its agrochemical properties were conducted. Therefore, evaluation often emphasizes many shortcomings,