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对湖南、湖北、四川省部分植物性样品（共245个）中稀土元素含量研究表明:部分植物性样品中稀土元素含量顺序为：小麦＞大米＞柑桔＞韭菜＞菠菜；水稻、柑桔在连续6年使用稀土后，其增加的绝对量无明显变化，以煤灰为主要肥料的韭菜样品中稀土元素含量明显高于以农家肥为主要肥料的韭菜样品。
The results showed that the order of rare earth elements in some plant samples was wheat> rice> citrus> leek> spinach; rice and citrus in the order of After six years of continuous use of rare earth, the absolute amount did not change significantly. The content of rare earth elements in Chinese chive sample with coal ash as main fertilizer was obviously higher than that of leek sample with farmyard manure as main fertilizer.