目前常用的稀土微肥主要是硝酸稀土、氯化稀土和硫酸稀土。为了探索稀土微肥在农作物上的施用效果，1996年我们在中国科技大学赵贵文教授指导下，引进了河南省商丘稀土微肥示范厂生产的稀土微肥—“常乐”益植素并在水稻上进行了试验和示范，取得了良好的经济效果，平均增产19 At present, rare earth micronutrients are mainly rare earth nitrate, rare earth chloride and rare earth sulfate. In order to explore the effect of rare earth fertilizer on crops, in 1996, under the guidance of Professor Zhao Guiwen of China University of Science and Technology, we introduced rare earth fertilizer - “Changle” beneficial plant produced by Shangqiu rare earth fertilizer demonstration plant in Henan Province, Conducted tests and demonstrations and achieved good economic results with an average increase of 19%