Abstract
Selenium constitutes an essential trace element for the human body. Moderate Se intake plays a pivotal role in preserving overall health. The absorption of Se by plants is primarily influenced by the available Se levels in soils, rather than by the soil total Se content, offering potential for exploring Se-rich crops in Se-deficient regions. In this study, we explore the factors influencing the Se bioaccumulation coefficient in corn based on a land quality geochemical survey at a 1:50,000 scale and establish predictive models for corn seed Se content using random forest and multiple linear regression approaches. The results indicate that the surface soil in the study area is deficient in Se (0.18–1.21 mg/kg), but 54% of the corn grain samples met the standards for Se-rich products (0.02–0.30 mg/kg). The factors influencing the Se biological enrichment coefficient in corn seeds are soil pH and CaO and MgO content, with impact levels of 0.54, 0.42, and 0.35, respectively. Compared to multiple linear regression models, the RF model provides more accurate and reliable predictions of corn Se content. The random forest model indicates that approximately 41% of the farmland within the study area is conducive to the cultivation of naturally Se-rich corn, which is a 26% increase in the planting area compared to recommendations based solely on soil Se content. In this research, we introduce an innovative methodological framework for organically cultivating naturally Se-rich corn within regions affected by Se deficiency.
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This work was supported by the Ministry of Natural Resources of China Geological Survey [Project Nos. DD20211576、DD20230480].
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JZ involved in formal analysis, writing—original draft, and funding acquisition; ZH involved in writing—original draft and formal analysis; CM involved in investigation and formal analysis; HG involved in formal analysis and investigation; LD involved in writing—original draft, formal analysis, and methodology; HZ involved in investigation and methodology; WW involved in formal analysis and investigation; WC involved in investigation and methodology; JL involved in conceptualization and supervision; SF involved in methodology and writing—review and editing.
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Zhang, J., Huo, Z., Mao, C. et al. Modeling the feasibility of Se-rich corn cultivation in Se-deficient agricultural fields using random forest algorithm. Environ Geochem Health 46, 46 (2024). https://doi.org/10.1007/s10653-023-01831-1
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DOI: https://doi.org/10.1007/s10653-023-01831-1