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Increasing soil moisture faciliates the outcomes of exogenous sulfate rather than element sulfur in reducing cadmium accumulation in rice (Oryza sativa L.).
Ecotoxicol Environ Saf. 2020 Mar 15; 191:110200.EE

Abstract

Cadmium (Cd) contamination in paddy soils and the related pollution risk of rice grain have received increasing attention. Agronomic measures, such as the application of sulfur and changes in water regimes, were reported to mitigate the accumulation of Cd in rice. However, there is limited information on the combined effects of sulfur application and water regimes. Therefore, a pot experiment was conducted to investigate the effects of two sulfur forms, three water regimes and multiple sulfur application rates on Cd accumulation in rice. The sulfur was applied as SO42- (SVI, replacing the traditional fertilizers by SO42--containing fertilizers), and element S (S0) was applied at 0, 10, 20, 30 and 40 mg S kg-1 soil. The water regimes were continuous flooding (F), flooding-moist alternation (FM), and moist irrigation (M), for a total of 30 treatments. The results indicated that application of SVI exceeding 30 mg S kg-1 significantly reduced the Cd concentrations in brown rice by 31.1-56.3%, and the Cd concentrations decreased with increasing amount of irrigation water. Similar reductions in Cd concentrations in rice shoots and rice straw collected at tillering and maturity stages were observed after application of SVI. However, the effect of S0 application on Cd accumulation in grain was not significant under different water regimes. Furthermore, this study found that application of both SVI and S0 inhibited the transfer of Cd from rice roots to shoots in most cases. These findings indicate that replacing traditional fertilizers with SO42--containing fertilizers, especially combined with increased irrigation, could be a potential approach to mitigate Cd accumulation in rice growing in Cd-contaminated acidic paddy soils.

Authors+Show Affiliations

College of Agriculture, Yangtze University, Jingzhou, 434025, China; Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China. Electronic address: qhzhu@isa.ac.cn.College of Agriculture, Yangtze University, Jingzhou, 434025, China.Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31958629

Citation

Liu, Tong-Tong, et al. "Increasing Soil Moisture Faciliates the Outcomes of Exogenous Sulfate Rather Than Element Sulfur in Reducing Cadmium Accumulation in Rice (Oryza Sativa L.)." Ecotoxicology and Environmental Safety, vol. 191, 2020, p. 110200.
Liu TT, Huang DY, Zhu QH, et al. Increasing soil moisture faciliates the outcomes of exogenous sulfate rather than element sulfur in reducing cadmium accumulation in rice (Oryza sativa L.). Ecotoxicol Environ Saf. 2020;191:110200.
Liu, T. T., Huang, D. Y., Zhu, Q. H., Zhou, J. L., Zhang, Q., Zhu, H. H., & Xu, C. (2020). Increasing soil moisture faciliates the outcomes of exogenous sulfate rather than element sulfur in reducing cadmium accumulation in rice (Oryza sativa L.). Ecotoxicology and Environmental Safety, 191, 110200. https://doi.org/10.1016/j.ecoenv.2020.110200
Liu TT, et al. Increasing Soil Moisture Faciliates the Outcomes of Exogenous Sulfate Rather Than Element Sulfur in Reducing Cadmium Accumulation in Rice (Oryza Sativa L.). Ecotoxicol Environ Saf. 2020 Mar 15;191:110200. PubMed PMID: 31958629.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Increasing soil moisture faciliates the outcomes of exogenous sulfate rather than element sulfur in reducing cadmium accumulation in rice (Oryza sativa L.). AU - Liu,Tong-Tong, AU - Huang,Dao-You, AU - Zhu,Qi-Hong, AU - Zhou,Jian-Li, AU - Zhang,Quan, AU - Zhu,Han-Hua, AU - Xu,Chao, Y1 - 2020/01/17/ PY - 2019/10/12/received PY - 2020/01/09/revised PY - 2020/01/10/accepted PY - 2020/1/21/pubmed PY - 2020/4/10/medline PY - 2020/1/21/entrez KW - Cd accumulation KW - Elemental sulfur KW - Rice KW - Sulfate KW - Water management SP - 110200 EP - 110200 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 191 N2 - Cadmium (Cd) contamination in paddy soils and the related pollution risk of rice grain have received increasing attention. Agronomic measures, such as the application of sulfur and changes in water regimes, were reported to mitigate the accumulation of Cd in rice. However, there is limited information on the combined effects of sulfur application and water regimes. Therefore, a pot experiment was conducted to investigate the effects of two sulfur forms, three water regimes and multiple sulfur application rates on Cd accumulation in rice. The sulfur was applied as SO42- (SVI, replacing the traditional fertilizers by SO42--containing fertilizers), and element S (S0) was applied at 0, 10, 20, 30 and 40 mg S kg-1 soil. The water regimes were continuous flooding (F), flooding-moist alternation (FM), and moist irrigation (M), for a total of 30 treatments. The results indicated that application of SVI exceeding 30 mg S kg-1 significantly reduced the Cd concentrations in brown rice by 31.1-56.3%, and the Cd concentrations decreased with increasing amount of irrigation water. Similar reductions in Cd concentrations in rice shoots and rice straw collected at tillering and maturity stages were observed after application of SVI. However, the effect of S0 application on Cd accumulation in grain was not significant under different water regimes. Furthermore, this study found that application of both SVI and S0 inhibited the transfer of Cd from rice roots to shoots in most cases. These findings indicate that replacing traditional fertilizers with SO42--containing fertilizers, especially combined with increased irrigation, could be a potential approach to mitigate Cd accumulation in rice growing in Cd-contaminated acidic paddy soils. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/31958629/Increasing_soil_moisture_faciliates_the_outcomes_of_exogenous_sulfate_rather_than_element_sulfur_in_reducing_cadmium_accumulation_in_rice__Oryza_sativa_L___ DB - PRIME DP - Unbound Medicine ER -