Abstract
Selenium (Se) is essential to human health, anti-cancer, possessing antioxidant, and antiviral properties. In this study, the spatial patterns of rice Se and their varying relationship with soil Se on a regional scale were studied using hot spot analysis for the agricultural soils in Guangxi. According to the hot and cold spot maps, rice Se correlates positively with soil Se in Guangxi agricultural soils. High rice Se accompanies high soil Se in the central part of Guangxi (e.g., Liuzhou, Laibin), and low rice Se is in line with low soil Se in the western part (e.g., Baise). However, the hot spot analysis maps indicate that southwestern Guangxi exhibits a special characteristic of low rice Se with high soil Se (e.g., Chongzuo). This special pattern is strongly associated with the high concentrations of Fe2O3 (ferromanganese nodules) in the carbonate rock area. The hot spot analysis proves useful in revealing the spatial patterns of rice Se in Guangxi and identifying the hidden patterns.
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The authors are grateful to all the anonymous reviewers for help in improving this paper.
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This work was supported by Public Welfare Geological Survey Project of Shaanxi Province, China (Health Geological Survey and Evaluation of Qinba Mountain Area, Granted No. 202201), the Geological Survey Project of China Geological Survey (DD20211414), the China Scholarship Council, the Project of Geochemical Study on Selenium and Heavy Metal Elements in Central − Eastern Area of Guangxi, China (2015 − 2016), Study on the Genesis and Ecological Effect of Se, Ge, and Cd in Soil of Guangxi, China (2017 − 2019), Ecological and Geochemical Survey and Study on the Heavy Metals in Typical Soil of Guangxi, China (2018 − 2019), Pollution Identification and Ecological Risk Assessment on Heavy Metals of Soil in the Area with High Geochemical Background in Guangxi, China (2017 − 2018), Guangxi Key Research and Development Plan (GUIKEAB18050024). Projects of Land Quality Geochemical Assessment of Guangxi.
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XL: Conceptualization, Methodology, Formal analysis, Investigation, Writing—Original Draft, Writing—Review & Editing, Visualization. CZ and TY: Writing—Review & Editing. WJ: Investigation, Resources. TW and XZ: Supervision, Project administration, Funding acquisition. CL and BL: Investigation, Resources. LW: Investigation, Resources. YS: Investigation, Resources. KL: Data Curation. XM: Investigation, Resources. ZY: Conceptualization, Writing—Review & Editing, Supervision, Project administration.
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Liu, X., Zhang, C., Yu, T. et al. Identification of the spatial patterns and controlling factors of Se in soil and rice in Guangxi through hot spot analysis. Environ Geochem Health 45, 4477–4492 (2023). https://doi.org/10.1007/s10653-023-01508-9
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DOI: https://doi.org/10.1007/s10653-023-01508-9