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以鲁棉６号及棕壤、褐土、潮土和砂姜黑土为试验材料，进行棉花自然吸收稀土的动态研究。结果表明，在棉花生长发育的早中期，叶中的稀土含量和吸收量均高于茎和根。在成熟期根中的稀土含量和吸收量均达最高值。叶和茎的稀土含量在不同的生育期中变化较平缓，而根的稀上含量变幅较大，呈前高中低后又高的变化趋势。稀土在棉花发育的花龄期有较强的活力，提示我们施用稀土应在生长的早期。土壤的稀土含量状况和其他农化性状也影响着棉花对稀土的吸收。与棉花叶片稀土含量的临界值相比较，４种土壤均需要施用稀土元素肥料。
Lulian 6 and brown soil, cinnamon soil, fluvo-aquic soil and saprolium black soil were used as experimental materials to study the dynamic changes of rare earths absorbed by cotton. The results showed that in the early and middle stages of cotton growth and development, the content and absorption of REEs in leaves were higher than those of stems and roots. Rare earth content and uptake reached the maximum in mature roots. The content of rare earth in leaves and stems changed more slowly in different growth stages, while the content of rare earth in roots varied greatly, showing the trend of high and low before and after high. Rare flowers in the cotton growing age have strong vitality, suggesting that we should be in the early growth of rare earth. Rare earth content of soil and other agronomic traits also affect cotton’s absorption of rare earths. Compared with the critical value of the rare earth content of cotton leaves, all four kinds of soils need to use rare earth element fertilizers.