1简介稀上复混肥是多元素高效养分农用肥料．该用料是以碳铵为主要氨素来源，添加磷按、钾肥、稀土添加剂、微量元素和调理剂混配而成．碳酸氢按作为我国氮肥的主要品种之一，存在着易分解、易结块的不稳定性，还给贮存及施肥带来诸多不便．稀土复混肥具有高效生物固氮，促进作 1 Introduction Lean compound fertilizer is a multi-element high-efficiency nutrient fertilizer. The material is based on ammonium bicarbonate as the main source of ammonia, phosphorus by adding, potassium, rare earth additives, trace elements and conditioning agents mixed together. As one of the main nitrogenous fertilizers in our country, bicarbonate has the instability which is easy to decompose and caking, and brings many inconveniences to the storage and fertilization. Rare earth compound fertilizer with efficient biological nitrogen fixation, and promote the work