目前,碳酸氢铵仍为我国的主要氮肥品种,约占全国氮肥总量的50%以上。由于它具有易吸湿和易挥发损失的缺点,因而其氮素利用率不到30%。早在70年代,一些研究者为了提高碳铵氮素利用率而将碳铵压粒深施,其利用率可提高到50%以上。若以碳铵为基质生产复混粒肥,既可提高碳铵的氮素利用率,达到推广配方施肥、增产节肥的目的,又可提高碳铵的商 At present, ammonium bicarbonate is still the main nitrogenous fertilizer species in China, accounting for more than 50% of the total nitrogenous fertilizer in the country. Its nitrogen utilization is less than 30% because of its disadvantages of being hygroscopic and volatile. As early as the 1970s, some researchers increased the utilization rate of ammonium bicarbonate to infiltrate ammonium bicarbonate, and its utilization rate can be increased to over 50%. If ammonium bicarbonate is used as a matrix to produce compound granulated fertilizer, the nitrogen utilization rate of ammonium bicarbonate can be increased, and the purpose of promoting formula fertilization, increasing yield and saving fertilizer, and improving the quotient of ammonium bicarbonate