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Environmental Science and Pollution Research

, Volume 25, Issue 31, pp 31175–31182 | Cite as

Selenium application alters soil cadmium bioavailability and reduces its accumulation in rice grown in Cd-contaminated soil

  • Qingqing Huang
  • Yingming Xu
  • Yiyun Liu
  • Xu Qin
  • Rong Huang
  • Xuefeng Liang
Research Article

Abstract

Selenium (Se) alleviates cadmium (Cd) accumulation in several plants. Nevertheless, it is still unclear why it has such effect. Thus, this study aimed to investigate the effects of Se on soil Cd bioavailability, and Cd accumulation in flooded rice plants, and to determine the mechanisms underlying these effects. Concentration of Cd and Se in different rice tissues was determined along Cd and Se concentrations in the soil solution and soil Cd fractions. Results showed that exogenous selenite and selenate treatments significantly increased rice grain Se by 4.25- and 2.39-fold and decreased Cd by 36.5% and 25.3% relative to control treatment, respectively. The addition of Se to Cd-contaminated soil significantly decreased total Cd concentration in the soil solution by 11.2–13.0%, increased soil pH by 0.06–0.32 units, and enhanced soil Cd immobilization in relation to control. Exogenous Se also reduced diethylenetriaminepentaacetic acid-Cd, exchangeable, and residual Cd but increased the levels of Cd bound to carbonate and iron and manganese oxides. Thus, amending Cd-contaminated soil with Se may help decrease Cd content as well as increase Se levels in rice grain, as Se may mitigate Cd accumulation in rice plants by increasing soil pH, reducing Cd bioavailability, and inhibiting Cd translocation from roots to shoots.

Keywords

Cadmium Selenium Rice Soil Accumulation Bioavailability 

Notes

Funding

This work was financially supported by the National Natural Science Foundation of China (No. 41601343), Central Public Research Institute Basic Fund for Research and Development (No.2016-szjj-HQQ), and the Funds for Science and Technology Innovation Project from the Chinese Academy of Agricultural Sciences (No. CAAS-XTCX-2016018).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Qingqing Huang
    • 1
    • 2
  • Yingming Xu
    • 1
    • 2
  • Yiyun Liu
    • 1
    • 2
  • Xu Qin
    • 1
    • 2
  • Rong Huang
    • 1
    • 2
  • Xuefeng Liang
    • 1
    • 2
  1. 1.Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands, Agro-Environmental Protection InstituteMinistry of AgricultureTianjinPeople’s Republic of China
  2. 2.Key Laboratory of Original Environmental Quality of MOA, Agro-Environmental Protection InstituteMinistry of AgricultureTianjinPeople’s Republic of China

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