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Growth and Cd uptake by rice (Oryza sativa) in acidic and Cd-contaminated paddy soils amended with steel slag.
Chemosphere. 2017 Dec; 189:247-254.C

Abstract

Contamination of rice (Oryza sativa) by Cd is of great concern. Steel slag could be used to amend Cd-contaminated soils and make them safe for cereal production. This work was conducted to study the effects of steel slag on Cd uptake and growth of rice plants in acidic and Cd-contaminated paddy soils and to determine the possible mechanisms behind these effects. Pot (rhizobag) experiments were conducted using rice plants grown on two acidic and Cd-contaminated paddy soils with or without steel slag amendment. Steel slag amendment significantly increased grain yield by 36-45% and root catalase activity, and decreased Cd concentrations in brown rice by 66-77% compared with the control, in both soils. Steel slag amendment also markedly decreased extractable soil Cd, Cd concentrations in pore-water and Cd translocation from roots to above-ground parts. It also significantly increased soil pH, extractable Si and Ca in soils and Ca concentrations in roots. Significant positive correlations were found between extractable soil Cd and Cd concentrations in rice tissues, but it was negatively correlated with soil pH and extractable Si. Calcium in root tissues significantly and negatively correlated with Cd translocation factors from roots to straw. Overall, steel slag amendment not only significantly promoted rice growth but decreased Cd accumulation in brown rice. These benefits appear to be related to improvements in soil conditions (e.g. increasing pH, extractable Si and Ca), a reduction in extractable soil Cd, and suppression of Cd translocation from roots to above-ground parts.

Authors+Show Affiliations

School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, PR China; School of Environment and Tourism, West Anhui University, Lu'an, 237012, PR China.Department of Biology and Chemistry and State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region.School of Geography and Planning, Sun Yat-sen University, Guangzhou, 510275, PR China.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China. Electronic address: eesqrl@mail.sysu.edu.cn.Centre for Education in Environmental Sustainability and Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong Special Administrative Region.School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, PR China. Electronic address: lssyzhh@mail.sysu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28942250

Citation

He, Huaidong, et al. "Growth and Cd Uptake By Rice (Oryza Sativa) in Acidic and Cd-contaminated Paddy Soils Amended With Steel Slag." Chemosphere, vol. 189, 2017, pp. 247-254.
He H, Tam NFY, Yao A, et al. Growth and Cd uptake by rice (Oryza sativa) in acidic and Cd-contaminated paddy soils amended with steel slag. Chemosphere. 2017;189:247-254.
He, H., Tam, N. F. Y., Yao, A., Qiu, R., Li, W. C., & Ye, Z. (2017). Growth and Cd uptake by rice (Oryza sativa) in acidic and Cd-contaminated paddy soils amended with steel slag. Chemosphere, 189, 247-254. https://doi.org/10.1016/j.chemosphere.2017.09.069
He H, et al. Growth and Cd Uptake By Rice (Oryza Sativa) in Acidic and Cd-contaminated Paddy Soils Amended With Steel Slag. Chemosphere. 2017;189:247-254. PubMed PMID: 28942250.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Growth and Cd uptake by rice (Oryza sativa) in acidic and Cd-contaminated paddy soils amended with steel slag. AU - He,Huaidong, AU - Tam,Nora F Y, AU - Yao,Aijun, AU - Qiu,Rongliang, AU - Li,Wai Chin, AU - Ye,Zhihong, Y1 - 2017/09/17/ PY - 2017/07/07/received PY - 2017/09/14/revised PY - 2017/09/15/accepted PY - 2017/9/25/pubmed PY - 2018/1/13/medline PY - 2017/9/25/entrez KW - Biomass KW - Cadmium KW - Paddy rice KW - Plant uptake KW - Soil remediation KW - Steel slag SP - 247 EP - 254 JF - Chemosphere JO - Chemosphere VL - 189 N2 - Contamination of rice (Oryza sativa) by Cd is of great concern. Steel slag could be used to amend Cd-contaminated soils and make them safe for cereal production. This work was conducted to study the effects of steel slag on Cd uptake and growth of rice plants in acidic and Cd-contaminated paddy soils and to determine the possible mechanisms behind these effects. Pot (rhizobag) experiments were conducted using rice plants grown on two acidic and Cd-contaminated paddy soils with or without steel slag amendment. Steel slag amendment significantly increased grain yield by 36-45% and root catalase activity, and decreased Cd concentrations in brown rice by 66-77% compared with the control, in both soils. Steel slag amendment also markedly decreased extractable soil Cd, Cd concentrations in pore-water and Cd translocation from roots to above-ground parts. It also significantly increased soil pH, extractable Si and Ca in soils and Ca concentrations in roots. Significant positive correlations were found between extractable soil Cd and Cd concentrations in rice tissues, but it was negatively correlated with soil pH and extractable Si. Calcium in root tissues significantly and negatively correlated with Cd translocation factors from roots to straw. Overall, steel slag amendment not only significantly promoted rice growth but decreased Cd accumulation in brown rice. These benefits appear to be related to improvements in soil conditions (e.g. increasing pH, extractable Si and Ca), a reduction in extractable soil Cd, and suppression of Cd translocation from roots to above-ground parts. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/28942250/Growth_and_Cd_uptake_by_rice__Oryza_sativa__in_acidic_and_Cd_contaminated_paddy_soils_amended_with_steel_slag_ DB - PRIME DP - Unbound Medicine ER -