Summary
This pot-based field trial conducted at Bangladesh Agricultural University evaluated the efficacy of lime and organic soil amendments in mitigating cadmium uptake by maize grown in industrially contaminated soils. The findings demonstrate that both lime (10 g pot⁻¹) and organic manures—cow dung and poultry manure (80 g pot⁻¹)—significantly increased maize yields whilst reducing cadmium concentration in plant tissue and soil phytoavailability compared to unamended control plots. The work contributes evidence for non-chemical soil remediation strategies applicable to cadmium-contaminated agricultural systems.
Regional applicability
The findings are of limited direct applicability to UK cereal production, as cadmium contamination from industrial waste discharge is not a primary agronomic concern in the UK. However, the mechanistic insights regarding soil amendment-mediated reduction of heavy metal bioavailability may inform best-practice guidance for managing historically contaminated brownfield agricultural sites or areas receiving phosphate fertiliser with elevated cadmium content.
Key measures
Maize grain yield, stover yield, cadmium concentration in plant tissue, cadmium concentration in soil, cadmium phytoavailability
Outcomes reported
The study measured grain and stover yields of maize, and cadmium concentrations in maize plants and soil following amendment treatments. It assessed the effectiveness of lime and organic manures (cow dung and poultry manure) in reducing cadmium phytoavailability in contaminated soils.
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