Summary
This field-based study investigates the within-field heterogeneity of cadmium accumulation in rice grain, identifying soil redox status and pH during the grain-filling period as critical controlling factors. The research suggests that management of soil conditions during critical growth phases may influence cadmium uptake variability across a cultivated field, with implications for contamination risk assessment and mitigation in rice production systems.
UK applicability
Rice is not a major UK cereal crop; however, the mechanistic findings regarding soil redox and pH control of heavy metal bioavailability and uptake may inform understanding of cadmium and other trace metal mobility in UK arable soils, particularly in poorly drained or organic soils where redox fluctuations occur.
Key measures
Rice grain cadmium concentration; soil redox potential; soil pH; spatial variation mapping within a field
Outcomes reported
The study examined spatial variation in cadmium concentration in rice grain across a field and identified soil redox status and pH during grain filling as key determinants of this variation.
Topic tags
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