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Low uptake affinity cultivars with biochar to tackle Cd-tainted rice--A field study over four rice seasons in Hunan, China.
Sci Total Environ. 2016 Jan 15; 541:1489-1498.ST

Abstract

Biochar is becoming an environmentally friendly material for remediation of heavy metal contaminated soils and improving food safety. A field trial over four rice seasons was conducted to investigate the use of biochar and low Cd accumulating cultivars on Cd uptake in a heavy metal contaminated soil. Wheat straw derived biochar was applied at 0, 20 and 40 t ha(-1). Two rice cultivars with differing Cd accumulation abilities were selected in each season. The results showed that both biochar and low Cd affinity cultivars significantly reduced rice grain Cd accumulation. Biochar had no significant effect the first season but thereafter consistently reduced rice grain Cd by a maximum of 61, 86 and 57% over the next three seasons. Zn accumulation in the rice grains was not decreased by biochar application, although available soil Zn was sharply reduced (35-91%). Indica conventional rice cultivars had much lower Cd, but higher Zn and lower Cd/Zn ratios in the grain than indica hybrid cultivars. Biochar was more effective for mitigating grain Cd accumulation in low Cd affinity cultivars than in high affinity cultivars. Soil pH was sustainably increased (up to nearly 1 unit) while available Cd significantly decreased by a maximum of 85% after biochar addition. The translocation of Cd from rice roots to shoots was reduced from 20 to 80% by biochar. Low uptake affinity cultivars combined with biochar reduced late rice grain Cd concentration and Cd/Zn ratios by 69-80% and 72-80%, respectively. It indicated that the management of combining biochar and low Cd affinity cultivars should be an efficient way to remediate Cd contaminated rice paddies and reduce health risk associated with consuming rice from these soils.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Chen
Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China.
Guo H
Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China.
Li R
Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China.
Li L
Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China. Electronic address: lqli@njau.edu.cn.
Pan G
Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China.
Chang A
Department of Environmental Sciences, University of California, Riverside, CA 92521, USA.
Joseph S
Institute of Resources, Ecosystem and Environment of Agriculture, and Center of Biochar and Green Agriculture, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, China; School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia.

MeSH

Biodegradation, EnvironmentalCadmiumCharcoalChinaFood ContaminationOryzaSeasonsSoilSoil Pollutants

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26490528

Citation

Chen, De, et al. "Low Uptake Affinity Cultivars With Biochar to Tackle Cd-tainted rice--A Field Study Over Four Rice Seasons in Hunan, China." The Science of the Total Environment, vol. 541, 2016, pp. 1489-1498.
Chen , Guo H, Li R, et al. Low uptake affinity cultivars with biochar to tackle Cd-tainted rice--A field study over four rice seasons in Hunan, China. Sci Total Environ. 2016;541:1489-1498.
Chen, ., Guo, H., Li, R., Li, L., Pan, G., Chang, A., & Joseph, S. (2016). Low uptake affinity cultivars with biochar to tackle Cd-tainted rice--A field study over four rice seasons in Hunan, China. The Science of the Total Environment, 541, 1489-1498. https://doi.org/10.1016/j.scitotenv.2015.10.052
Chen , et al. Low Uptake Affinity Cultivars With Biochar to Tackle Cd-tainted rice--A Field Study Over Four Rice Seasons in Hunan, China. Sci Total Environ. 2016 Jan 15;541:1489-1498. PubMed PMID: 26490528.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Low uptake affinity cultivars with biochar to tackle Cd-tainted rice--A field study over four rice seasons in Hunan, China. AU - Chen,De, AU - Guo,Hu, AU - Li,Ruiyue, AU - Li,Lianqing, AU - Pan,Genxing, AU - Chang,Andrew, AU - Joseph,Stephen, Y1 - 2015/11/11/ PY - 2015/07/12/received PY - 2015/10/08/revised PY - 2015/10/09/accepted PY - 2015/10/23/entrez PY - 2015/10/23/pubmed PY - 2016/8/16/medline KW - Biochar KW - Cultivar KW - Heavy metal KW - Human health KW - Remediation KW - Rice paddy SP - 1489 EP - 1498 JF - The Science of the total environment JO - Sci Total Environ VL - 541 N2 - Biochar is becoming an environmentally friendly material for remediation of heavy metal contaminated soils and improving food safety. A field trial over four rice seasons was conducted to investigate the use of biochar and low Cd accumulating cultivars on Cd uptake in a heavy metal contaminated soil. Wheat straw derived biochar was applied at 0, 20 and 40 t ha(-1). Two rice cultivars with differing Cd accumulation abilities were selected in each season. The results showed that both biochar and low Cd affinity cultivars significantly reduced rice grain Cd accumulation. Biochar had no significant effect the first season but thereafter consistently reduced rice grain Cd by a maximum of 61, 86 and 57% over the next three seasons. Zn accumulation in the rice grains was not decreased by biochar application, although available soil Zn was sharply reduced (35-91%). Indica conventional rice cultivars had much lower Cd, but higher Zn and lower Cd/Zn ratios in the grain than indica hybrid cultivars. Biochar was more effective for mitigating grain Cd accumulation in low Cd affinity cultivars than in high affinity cultivars. Soil pH was sustainably increased (up to nearly 1 unit) while available Cd significantly decreased by a maximum of 85% after biochar addition. The translocation of Cd from rice roots to shoots was reduced from 20 to 80% by biochar. Low uptake affinity cultivars combined with biochar reduced late rice grain Cd concentration and Cd/Zn ratios by 69-80% and 72-80%, respectively. It indicated that the management of combining biochar and low Cd affinity cultivars should be an efficient way to remediate Cd contaminated rice paddies and reduce health risk associated with consuming rice from these soils. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/26490528/Low_uptake_affinity_cultivars_with_biochar_to_tackle_Cd_tainted_rice__A_field_study_over_four_rice_seasons_in_Hunan_China_ DB - PRIME DP - Unbound Medicine ER -