目前,碳酸氢铵(简称碳铵)的用量在我省氮素化肥的总用量中占有较大的比重(57%)。但是,碳铵的化学性质不稳定,容易分解,挥发,含氮量又低,给贮运和使用带来许多不便。如果施用不当,不仅会降低肥料的效果,而且还会污染环境。因此,深入研究碳铵在稻田土壤中的去向,改进施用方法以提 At present, the amount of ammonium bicarbonate (referred to as ammonium bicarbonate) occupies a large proportion (57%) of the total amount of nitrogenous fertilizer in our province. However, the chemical nature of ammonium bicarbonate is unstable, easily decomposed and volatilized, and nitrogen content is low, which brings many inconveniences to storage and use. Improper application can not only reduce the effectiveness of fertilizer but also pollute the environment. Therefore, in-depth study of ammonium carbon in the paddy soil to improve the application method to mention