Effect of irrigation and genotypes towards reduction in arsenic load in rice

•The concentrations of arsenic (As) in rice grains are cultivar dependent.•High grain As bioaccumulation was detected in plants in areas of high soil As.•AWD irrigation practice reduced 17% to 35% of grain As concentration.•7% to 38% increase in rice grain yield under AWD irrigation practice.•Modera...

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Veröffentlicht in:The Science of the total environment 2017-12, Vol.609, p.311-318
Hauptverfasser: Islam, Shofiqul, Rahman, Mohammad Mahmudur, Islam, M.R., Naidu, Ravi
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creator Islam, Shofiqul
Rahman, Mohammad Mahmudur
Islam, M.R.
Naidu, Ravi
description •The concentrations of arsenic (As) in rice grains are cultivar dependent.•High grain As bioaccumulation was detected in plants in areas of high soil As.•AWD irrigation practice reduced 17% to 35% of grain As concentration.•7% to 38% increase in rice grain yield under AWD irrigation practice.•Moderate to high level of As contaminated soils some varieties are quite promising. [Display omitted] Arsenic (As) bioaccumulation in rice grains has been identified as a major problem in Bangladesh and many other parts of the world. Suitable rice genotypes along with proper water management practice regulating As levels in rice plants must be chosen and implemented. A field study was conducted to investigate the effect of continuous flooding (CF) and alternate wetting and drying (AWD) irrigation on the bioaccumulation of As in ten rice cultivars at three locations having different levels of soil As and irrigation water As. Results showed that As concentration in different parts of rice plants varied significantly (P
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[Display omitted] Arsenic (As) bioaccumulation in rice grains has been identified as a major problem in Bangladesh and many other parts of the world. Suitable rice genotypes along with proper water management practice regulating As levels in rice plants must be chosen and implemented. A field study was conducted to investigate the effect of continuous flooding (CF) and alternate wetting and drying (AWD) irrigation on the bioaccumulation of As in ten rice cultivars at three locations having different levels of soil As and irrigation water As. Results showed that As concentration in different parts of rice plants varied significantly (P&lt;0.0001) with rice genotypes and irrigation practices in the three study locations. Lower levels of As in rice were found in AWD irrigation practice compared to CF irrigation practice. Higher grain As bioaccumulation was detected in plants in areas of high soil As in combination with CF irrigation practice. Our data show that use of AWD irrigation practice with suitable genotypes led to 17 to 35% reduction in grain As level, as well as 7 to 38% increase in grain yield. Overall, this study advances our understanding that, for moderate to high levels of As contamination, the Binadhan-5, Binadhan-6, Binadhan-8, Binadhan-10 and BRRI dhan47 varieties were quite promising to mitigate As induced human health risk.</description><identifier>ISSN: 0048-9697</identifier><identifier>EISSN: 1879-1026</identifier><identifier>DOI: 10.1016/j.scitotenv.2017.07.111</identifier><identifier>PMID: 28753506</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Arsenic ; Bioaccumulation ; Mitigation strategies ; Rice genotypes ; Water management</subject><ispartof>The Science of the total environment, 2017-12, Vol.609, p.311-318</ispartof><rights>2017 Elsevier B.V.</rights><rights>Copyright © 2017 Elsevier B.V. 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[Display omitted] Arsenic (As) bioaccumulation in rice grains has been identified as a major problem in Bangladesh and many other parts of the world. Suitable rice genotypes along with proper water management practice regulating As levels in rice plants must be chosen and implemented. A field study was conducted to investigate the effect of continuous flooding (CF) and alternate wetting and drying (AWD) irrigation on the bioaccumulation of As in ten rice cultivars at three locations having different levels of soil As and irrigation water As. Results showed that As concentration in different parts of rice plants varied significantly (P&lt;0.0001) with rice genotypes and irrigation practices in the three study locations. Lower levels of As in rice were found in AWD irrigation practice compared to CF irrigation practice. Higher grain As bioaccumulation was detected in plants in areas of high soil As in combination with CF irrigation practice. Our data show that use of AWD irrigation practice with suitable genotypes led to 17 to 35% reduction in grain As level, as well as 7 to 38% increase in grain yield. 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[Display omitted] Arsenic (As) bioaccumulation in rice grains has been identified as a major problem in Bangladesh and many other parts of the world. Suitable rice genotypes along with proper water management practice regulating As levels in rice plants must be chosen and implemented. A field study was conducted to investigate the effect of continuous flooding (CF) and alternate wetting and drying (AWD) irrigation on the bioaccumulation of As in ten rice cultivars at three locations having different levels of soil As and irrigation water As. Results showed that As concentration in different parts of rice plants varied significantly (P&lt;0.0001) with rice genotypes and irrigation practices in the three study locations. Lower levels of As in rice were found in AWD irrigation practice compared to CF irrigation practice. Higher grain As bioaccumulation was detected in plants in areas of high soil As in combination with CF irrigation practice. 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subjects Arsenic
Bioaccumulation
Mitigation strategies
Rice genotypes
Water management
title Effect of irrigation and genotypes towards reduction in arsenic load in rice
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