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首页> 外文会议>International Conference on Environmental Concerns and Emerging Abatement Technologies >DISTRIBUTION AND BIOACCUMULATION OF RARE EARTH ELEMENTS IN PLANTS UNDER FIELD CASE STUDY CONDITIONS WITH AND WITHOUT RARE EARTH ELEMENT FERTILIZER APPLICATION
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DISTRIBUTION AND BIOACCUMULATION OF RARE EARTH ELEMENTS IN PLANTS UNDER FIELD CASE STUDY CONDITIONS WITH AND WITHOUT RARE EARTH ELEMENT FERTILIZER APPLICATION

机译：施用和不施用稀土元素肥料的田间案例研究条件下植物中稀土元素的分布和生物累积

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This field case study described the distribution and bioaccumulation of rare earth elements (REEs) in wheat, rice and vegetables grown in Jiangxi, Anhui, Beijing and Heilongjiang provinces, located in southern and northern China with various REE fertilizer application at different levels. The results indicated that REE accumulation trends in different parts of plants followed the order: root>leaf>stem>grain. The concentrations of REEs in roots, leaves and stems were increased remarkably when the REE fertilizers were applied. However, no significant accumulation was found in cereal grains except for that grown in Jiangxi site. A significant accumulation of REEs in the edible parts of vegetables is observed, therefore, no REE fertilizer should be recommended. In the meantime, the exogenous REEs in the fertilized soil were extracted by a three-stage sequential extraction procedure into three fractions: water soluble, exchangeable and carbonate bound (B1), Fe-Mn oxide bound (B2) and organic matter and sulfide bound (B3). Chemical fractions showed that all exogenous REEs were in the fractions B1, B2 and B3, ranging 1.49-13.91, 35.23-70.34 and 19.14-60.78%, respectively, and no exogenous REEs entered the residual form within the field study period. However, the chemical forms of exogenous REEs in the fertilized soil and their bioavailability were dependent on the physico-chemical properties of soil. It seems that REEs in fraction B1 is more easily available by plants.
机译：该田间案例研究描述了位于中国南部和北部的江西，安徽，北京和黑龙江省种植的小麦，大米和蔬菜中的稀土元素（REE）的分布和生物富集，以及不同水平的REE肥料的施用。结果表明，植物不同部位的稀土元素积累趋势依次为：根>叶>茎>粒。施REE肥料后，根，叶和茎中REE的浓度显着增加。但是，除了江西产区的谷物，没有发现明显的积累。观察到蔬菜可食部分中大量稀土元素的积累，因此，不建议使用稀土元素肥料。同时，通过三阶段连续萃取程序将施肥土壤中的外源稀土元素提取为三个部分：水溶性，可交换和碳酸盐结合（B1），铁锰氧化物结合（B2）以及有机物和硫化物结合（B3）。化学馏分表明，所有外源稀土元素均在馏分B1，B2和B3中，范围分别为1.49-13.91、35.23-70.34和19.14-60.78％，在田间研究期内，没有外源稀土元素进入残留形式。然而，施肥土壤中外源稀土元素的化学形式及其生物利用度取决于土壤的理化性质。似乎植物更容易获得馏分B1中的REE。

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