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Mitigation of rice cadmium (Cd) accumulation by joint application of organic amendments and selenium (Se) in high-Cd-contaminated soils.
Chemosphere. 2020 Feb; 241:125106.C

Abstract

A pot experiment was conducted to investigate the possible mediatory effect of organic amendments (vermicompost and biochar) and selenium (Se) on Cd bioaccumulation in both rice cultivars (high-Cd accumulation rice: Yuzhenxiang (YZX) and low-Cd accumulation rice: Changliangyou772 (CLY)) in high-Cd-contaminated soils. The results showed that Cd sensitivity and tolerance were cultivar-dependent, and grain Cd contents for CLY accorded with the Chinese national food safety standards (0.2 mg kg-1), whereas grain Cd levels for YZX were 1.4-5.8 times higher than those for CLY. Soil applications of amendments decreased grain Cd levels by 3.5%-36.9% for YZX and 36.1%-74.4% for CLY. Moreover, vermicompost (VC) was more effective in reducing Cd bioaccumulation than biochar (BC). A combination of Se and organic amendments could significantly increase grain Se contents and help further reduce grain Cd levels by 5.8%-20.8%, compared to the single organic amendments. This mitigation progress could be attributed to the changes of Cd translocation and distribution among rice tissues and the inhibition of Cd bioavailability in soil through the alteration in soil properties. Organic amendments, especially high dose (5%), increased soil pH and organic matter contents, and correspondingly decreased soil Cd bioavailability. A sequential extraction analysis suggested that organic amendments and Se facilitated the transformation of soil Cd from the bioavailable form to the immobilized Cd form, and thus decreased grain Cd levels. Hence, co-applications of organic amendments and Se in combination with low-Cd accumulation cultivar could be an effective strategy for both Se needs of humans and safe utilization of Cd polluted soil.

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Authors+Show Affiliations

Liu N
College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing, 400715, China; Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, China; State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, Southwest University, Chongqing, 400715, China.
Jiang Z
College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing, 400715, China; Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, China; State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, Southwest University, Chongqing, 400715, China.
Li X
College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, Shaanxi, China.
Liu H
College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing, 400715, China; Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, China; State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, Southwest University, Chongqing, 400715, China.
Li N
College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing, 400715, China; Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, China; State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, Southwest University, Chongqing, 400715, China.
Wei S
College of Resources and Environment, Department of Environment Science and Engineering, Southwest University, Chongqing, 400715, China; Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, China; State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, Southwest University, Chongqing, 400715, China. Electronic address: sqwei@swu.edu.cn.

MeSH

Biological AvailabilityCadmiumCharcoalCompostingEdible GrainEnvironmental ExposureHumansOryzaSeleniumSoilSoil PollutantsSpecies Specificity

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31683428

Citation

Liu, Na, et al. "Mitigation of Rice Cadmium (Cd) Accumulation By Joint Application of Organic Amendments and Selenium (Se) in high-Cd-contaminated Soils." Chemosphere, vol. 241, 2020, p. 125106.
Liu N, Jiang Z, Li X, et al. Mitigation of rice cadmium (Cd) accumulation by joint application of organic amendments and selenium (Se) in high-Cd-contaminated soils. Chemosphere. 2020;241:125106.
Liu, N., Jiang, Z., Li, X., Liu, H., Li, N., & Wei, S. (2020). Mitigation of rice cadmium (Cd) accumulation by joint application of organic amendments and selenium (Se) in high-Cd-contaminated soils. Chemosphere, 241, 125106. https://doi.org/10.1016/j.chemosphere.2019.125106
Liu N, et al. Mitigation of Rice Cadmium (Cd) Accumulation By Joint Application of Organic Amendments and Selenium (Se) in high-Cd-contaminated Soils. Chemosphere. 2020;241:125106. PubMed PMID: 31683428.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mitigation of rice cadmium (Cd) accumulation by joint application of organic amendments and selenium (Se) in high-Cd-contaminated soils. AU - Liu,Na, AU - Jiang,Zhenmao, AU - Li,Xiong, AU - Liu,Hanyi, AU - Li,Na, AU - Wei,Shiqiang, Y1 - 2019/10/13/ PY - 2019/07/21/received PY - 2019/10/05/revised PY - 2019/10/11/accepted PY - 2019/11/7/pubmed PY - 2020/2/23/medline PY - 2019/11/6/entrez KW - Bioavailability and bioaccumulation KW - Cadmium KW - Organic amendment KW - Rice KW - Selenium SP - 125106 EP - 125106 JF - Chemosphere JO - Chemosphere VL - 241 N2 - A pot experiment was conducted to investigate the possible mediatory effect of organic amendments (vermicompost and biochar) and selenium (Se) on Cd bioaccumulation in both rice cultivars (high-Cd accumulation rice: Yuzhenxiang (YZX) and low-Cd accumulation rice: Changliangyou772 (CLY)) in high-Cd-contaminated soils. The results showed that Cd sensitivity and tolerance were cultivar-dependent, and grain Cd contents for CLY accorded with the Chinese national food safety standards (0.2 mg kg-1), whereas grain Cd levels for YZX were 1.4-5.8 times higher than those for CLY. Soil applications of amendments decreased grain Cd levels by 3.5%-36.9% for YZX and 36.1%-74.4% for CLY. Moreover, vermicompost (VC) was more effective in reducing Cd bioaccumulation than biochar (BC). A combination of Se and organic amendments could significantly increase grain Se contents and help further reduce grain Cd levels by 5.8%-20.8%, compared to the single organic amendments. This mitigation progress could be attributed to the changes of Cd translocation and distribution among rice tissues and the inhibition of Cd bioavailability in soil through the alteration in soil properties. Organic amendments, especially high dose (5%), increased soil pH and organic matter contents, and correspondingly decreased soil Cd bioavailability. A sequential extraction analysis suggested that organic amendments and Se facilitated the transformation of soil Cd from the bioavailable form to the immobilized Cd form, and thus decreased grain Cd levels. Hence, co-applications of organic amendments and Se in combination with low-Cd accumulation cultivar could be an effective strategy for both Se needs of humans and safe utilization of Cd polluted soil. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31683428/Mitigation_of_rice_cadmium__Cd__accumulation_by_joint_application_of_organic_amendments_and_selenium__Se__in_high_Cd_contaminated_soils_ DB - PRIME DP - Unbound Medicine ER -