{"title":"Effects of fertilizers on arsenic accumulation in ratoon rice: implications for human health risks.","authors":"Kai-Wei Juang, Han-Ting Hsu, Wan-Ting Chiao, Chien-Hui Syu, Bo-Ching Chen","doi":"10.1007/s10653-025-02690-8","DOIUrl":null,"url":null,"abstract":"<p><p>Rice ratooning has received increased attention in recent years since it can reduce labor, seed, and energy inputs. However, rice ratooning may result in yield loss and thus requires the addition of fertilizers. In addition, some recent research has indicated that rice ratooning can significantly reduce the concentration of grain arsenic (As). Therefore, pot experiments were conducted in the present study to delineate the effects of different fertilizers on grain As accumulation in ratoon rice from three rice genotypes commonly cultivated in Taiwan. The interaction between iron (Fe) and As in rhizosphere soil and the root surface was also determined. The results showed that fertilizer treatment had profound effects on As accumulation in Fe plaque. In addition, there was a remarkable difference in the indexes of As sequestration by Fe oxides in root plaque (IAS) among the three cultivars. Significant correlations were found between As in brown rice and IAS across three genotypes and five fertilizers treatments, with the r<sup>2</sup> value ranging from 0.3933 to 0.8708. This result implies the feasibility of reducing As concentrations in grains by managing IAS in an Fe plaque environment in the rice ratooning system. Moreover, rice husk treatment showed different effects on As accumulation in the different rice genotypes, indicating that different fertilizer application strategies should be adopted for different genotypes to reduce As accumulation in ratoon rice. Lastly, according to the assessment results, the selection of TCS17 along with the application of 0.5-1% rice husk could effectively reduce the health risks associated with consuming ratoon rice. This study clarified the effects of fertilizers on As accumulation in ratoon rice, and future research is encouraged to characterize the effects of various factors on the accumulation and translocation of As in a rice ratoon system.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 9","pages":"377"},"PeriodicalIF":3.8000,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Geochemistry and Health","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s10653-025-02690-8","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
Rice ratooning has received increased attention in recent years since it can reduce labor, seed, and energy inputs. However, rice ratooning may result in yield loss and thus requires the addition of fertilizers. In addition, some recent research has indicated that rice ratooning can significantly reduce the concentration of grain arsenic (As). Therefore, pot experiments were conducted in the present study to delineate the effects of different fertilizers on grain As accumulation in ratoon rice from three rice genotypes commonly cultivated in Taiwan. The interaction between iron (Fe) and As in rhizosphere soil and the root surface was also determined. The results showed that fertilizer treatment had profound effects on As accumulation in Fe plaque. In addition, there was a remarkable difference in the indexes of As sequestration by Fe oxides in root plaque (IAS) among the three cultivars. Significant correlations were found between As in brown rice and IAS across three genotypes and five fertilizers treatments, with the r2 value ranging from 0.3933 to 0.8708. This result implies the feasibility of reducing As concentrations in grains by managing IAS in an Fe plaque environment in the rice ratooning system. Moreover, rice husk treatment showed different effects on As accumulation in the different rice genotypes, indicating that different fertilizer application strategies should be adopted for different genotypes to reduce As accumulation in ratoon rice. Lastly, according to the assessment results, the selection of TCS17 along with the application of 0.5-1% rice husk could effectively reduce the health risks associated with consuming ratoon rice. This study clarified the effects of fertilizers on As accumulation in ratoon rice, and future research is encouraged to characterize the effects of various factors on the accumulation and translocation of As in a rice ratoon system.
期刊介绍：
Environmental Geochemistry and Health publishes original research papers and review papers across the broad field of environmental geochemistry. Environmental geochemistry and health establishes and explains links between the natural or disturbed chemical composition of the earth’s surface and the health of plants, animals and people.
Beneficial elements regulate or promote enzymatic and hormonal activity whereas other elements may be toxic. Bedrock geochemistry controls the composition of soil and hence that of water and vegetation. Environmental issues, such as pollution, arising from the extraction and use of mineral resources, are discussed. The effects of contaminants introduced into the earth’s geochemical systems are examined. Geochemical surveys of soil, water and plants show how major and trace elements are distributed geographically. Associated epidemiological studies reveal the possibility of causal links between the natural or disturbed geochemical environment and disease. Experimental research illuminates the nature or consequences of natural or disturbed geochemical processes.
The journal particularly welcomes novel research linking environmental geochemistry and health issues on such topics as: heavy metals (including mercury), persistent organic pollutants (POPs), and mixed chemicals emitted through human activities, such as uncontrolled recycling of electronic-waste; waste recycling; surface-atmospheric interaction processes (natural and anthropogenic emissions, vertical transport, deposition, and physical-chemical interaction) of gases and aerosols; phytoremediation/restoration of contaminated sites; food contamination and safety; environmental effects of medicines; effects and toxicity of mixed pollutants; speciation of heavy metals/metalloids; effects of mining; disturbed geochemistry from human behavior, natural or man-made hazards; particle and nanoparticle toxicology; risk and the vulnerability of populations, etc.
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