从稀土矿区和非矿区采集的稀土超量积累植物铁芒萁的叶片分离成醚溶物、水溶物、碱溶物和残余物四个组分。用中子活化分析测定了其中稀土元素的含量 ,发现稀土元素主要存在于残余物 (果胶、半纤维素、纤维素 )中 ,而主要成份为蛋白的碱溶物中稀土含量维持较低水平 ,从而避免了大量稀土对植物正常生理功能造成影响。矿区幼叶醚溶物 (脂肪、色素、蜡等 )和碱溶物中稀土含量明显高于矿区和非矿区的成熟叶片 ,表明稀土元素很可能参与了植物的生理活动。 From the rare earth mining areas and non-mining area of ​​rare earth excess accumulation of plant iron mulberry leaves were separated into ether-soluble, water-soluble, alkali-soluble substances and residues of four components. The contents of rare earth elements were determined by neutron activation analysis. It was found that the rare earth elements were mainly present in the residues (pectin, hemicellulose, cellulose) and the content of rare earth in the alkali solubles whose main component was protein was kept at a low level , Thus avoiding a large number of rare earth plant physiological function of the normal impact. The contents of rare earth ether (Fats, pigments, waxes, etc.) and alkaline earth soluble substances in the mining area were significantly higher than those in the mining areas and non-mining areas, indicating that rare earth elements are likely involved in the physiological activities of plants.