碳酸氢铵(以下简称碳铵)是我国的主要氮肥品种。由于它易于分解挥发,特别是遇水后分解挥发更快,损失很大。许多资料表明,碳铵在水田中撒施作面肥或追肥,利用率一般不超过30%。为了提高碳铵在水田里施用的肥效,各地曾做了大量的研究工作,提出了如“压粒深施”、“球肥深施”等经济有效的施肥方法。但就目前使用情况来说,绝大部分 Ammonium bicarbonate (hereinafter referred to as ammonium bicarbonate) is China’s main nitrogen fertilizer varieties. Because it is easy to decompose and volatilize, especially after the water breaks down and volatilizes faster, the loss is very big. Many sources indicate that ammonium bicarbonate is applied to paddy or topdressing paddy so as not to exceed 30%. In order to improve the efficiency of ammonium bicarbonate application in paddy fields, a great deal of research work has been done in various places. Some economical and effective fertilization methods such as “pressure granulation deep application” and “deep application of ball fertilizer” have been put forward. However, the current use of the situation, the vast majority