Effect of nutrient uptake by plant roots on the fate of REEs in soil
Effect of nutrient uptake by plant roots on the fate of REEs in soil
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DOI：
10.1016/j.jallcom.2004.12.102
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发表时间：
2006-02-09
影响因子：
6.2
通讯作者：
Uchida, S
中科院分区：
文献类型：
--
作者：
Nakamaru, Y;Tagami, K;Uchida, S
观察大豆不同生长阶段土壤溶液中稀土元素（REE）和主要离子的浓度，以评估植物根系养分吸收对土壤-植物系统中稀土元素迁移的影响。大豆植株在盆中种植，并在温室中保存了 84 天。土壤溶液中主要营养阳离子（K和Ca）的浓度随着大豆的生长而降低。另一方面，Al、Y、La、Ce、Nd、Gd、Dy、Er 和 Yb 的浓度增加。虽然没有观察到 pH 值下降，但推测由于植物根部释放 H+ 以吸收 K+ 和 Ca2+，稀土元素和铝从土壤固相中溶解。随后，在大豆成熟阶段观察到稀土元素在大豆根部的生物富集。这些结果表明，大豆根部可以增强土壤固相中稀土元素的溶解，并且还可以通过植物生长积累稀土元素。 (c) 2005 Elsevier B.V. 保留所有权利。
Concentrations of rare earth elements (REEs) and major ions in soil solutions were observed under different growth stages of soybean in order to evaluate the effect of nutrient uptake by plant roots on the mobility of REEs in soil-plant systems. Soybean plants were grown in pots, which were kept in a greenhouse for 84 days. The concentrations of major nutrient cations (K and Ca) in the soil solution decreased with the soybean growth. On the other hand, the concentrations of Al, Y, La, Ce, Nd, Gd, Dy, Er and Yb increased. Although no decrease of pH was observed, it was assumed that the REEs and Al were dissolved from the soil solid phase due to H+ release from the plant roots for K+ and Ca2+ uptake. Subsequently, the bioaccumulation of REEs in the soybean roots was observed in the maturing stage of the soybean. These results showed that the soybean roots could enhance the dissolution of REEs from the soil solid phase and they could also accumulate REEs through plant growth. (c) 2005 Elsevier B.V. All rights reserved.