Selenium translocation in the soil-rice system in the Enshi seleniferous area, Central China | |
Chuanyu Chang; Runsheng Yin; Xun Wang; Shuxun Shao; Chongying Chen; Hua Zhang | |
2019 | |
Source Publication | Science of The Total Environment
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Volume | 669Pages:83-90 |
Abstract | Rice is an important source of selenium (Se) exposure; however, the transformation and translocation of Se in the soil-rice system remain poorly understood. Here, we investigated the speciation of Se in Se-rich soils from Enshi, Central China and assessed which Se species is bioavailable for rice grown in Enshi. Extremely high Se concentrations (0.85 to 11.46 mg/kg) were observed in the soils. The soil Se fractions, which include water-soluble Se (0.2 to 3.4%), ligand-exchangeable Se (4.5 to 15.0%), organically bound Se (57.8 to 80.0%) and residual Se (6.1 to 32.9%), are largely controlled by soil organic matter (SOM) levels. Decomposition of SOM promotes the transformation of organically bound Se to water-soluble Se and ligand-exchangeable Se, thereby increasing the bioavailability of Se. The bioaccumulation factors (BAFs) of Se decrease in the following order: roots (0.84 ± 0.30) > bran (0.33 ± 0.17) > leaves (0.18 ± 0.09) > polished rice (0.14 ± 0.07) > stems (0.12 ± 0.07) > husks (0.11 ± 0.07). Selenium levels in rice plants are affected by multiple soil Se fractions in the soil. Water-soluble, ligand-exchangeable and organically bound Se fractions are the major sources of Se in rice tissues. |
Keyword | Selenium soil rice transformation translocation enshi, China |
Indexed By | SCI |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/10197 |
Collection | 环境地球化学国家重点实验室 |
Affiliation | 1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China |
Recommended Citation GB/T 7714 | Chuanyu Chang;Runsheng Yin;Xun Wang;Shuxun Shao;Chongying Chen;Hua Zhang. Selenium translocation in the soil-rice system in the Enshi seleniferous area, Central China[J]. Science of The Total Environment,2019,669:83-90. |
APA | Chuanyu Chang;Runsheng Yin;Xun Wang;Shuxun Shao;Chongying Chen;Hua Zhang.(2019).Selenium translocation in the soil-rice system in the Enshi seleniferous area, Central China.Science of The Total Environment,669,83-90. |
MLA | Chuanyu Chang;Runsheng Yin;Xun Wang;Shuxun Shao;Chongying Chen;Hua Zhang."Selenium translocation in the soil-rice system in the Enshi seleniferous area, Central China".Science of The Total Environment 669(2019):83-90. |
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Selenium translocati(1691KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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