稀土复合肥是以碳铵为氮素原料,添加磷铵(普钙)、氯化钾(或硫酸钾)、稀土添加剂、微量元素和调理剂配制而成的多元素复混肥。是国家“八五”重点攻关项目,已在全国许多省的多种作物上试验示范推广。取得了较好的社会、经济效益。本肥料有几大特点:①有效地解决施用碳铵中氮易挥发、肥料利用 Rare earth compound fertilizer is a multi-element compound fertilizer made of ammonium bicarbonate as raw material of nitrogen and adding ammonium phosphate (general calcium), potassium chloride (or potassium sulfate), rare earth additives, trace elements and conditioners. It is a national key project of the Eighth Five-Year Plan that has been piloted and demonstrated on various crops in many provinces across the country. Has achieved good social and economic benefits. The fertilizer has several major features: ① effective solution to the use of ammonium bicarbonate volatile, fertilizer use