Summary
This 2020 field study examined the driving factors underlying selenium enrichment in soils across the naturally low-selenium Red Beds geological formation of Sichuan Basin, China. By identifying which soil properties and parent material characteristics enable selenium accumulation in an otherwise deficient region, the work contributes to understanding of spatially variable micronutrient availability in soils. The findings may inform targeted soil management or crop biofortification strategies in selenium-deficient agricultural areas.
UK applicability
The UK is generally not selenium-deficient at the soil level, though regional and individual crop variations exist. This study's mechanistic findings on selenium soil chemistry and geological controls may have limited direct applicability to UK farming practice, though the methodological approach to mapping micronutrient-enriched soil patches could inform soil survey work in nutrient-deficient regions globally.
Key measures
Soil selenium concentration, soil parent material composition, soil pH, organic matter content, soil texture, and associated geochemical variables
Outcomes reported
The study identified key geological, pedological and geochemical driving factors that determine selenium accumulation and availability in soils within a naturally low-selenium region. As suggested by the title, the research characterised selenium-enriched soil patches within the Red Beds formation of Sichuan Basin to understand why some areas develop adequate selenium content despite regional deficiency.
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