Predicting cadmium concentrations in wheat and barley grain using soil properties.

Area of Science:

• Agricultural Science
• Environmental Chemistry
• Food Safety

Background:

• Cadmium (Cd) accumulation in the food chain poses chronic health risks.
• Understanding soil-crop relationships is crucial for managing cadmium contamination in food.

Purpose of the Study:

• To investigate the link between soil properties and cadmium concentration in wheat and barley grain.
• To develop predictive models for grain cadmium levels.

Main Methods:

• Analysis of 162 wheat and 215 barley grain samples from soil-crop surveys and sewage sludge experiments.
• Multiple regression analysis to identify significant soil factors influencing grain cadmium.
• Development and validation of predictive models for wheat and barley grain cadmium.

Main Results:

• Cadmium concentrations were significantly lower in barley than wheat grain.
• Soil total cadmium and pH were key factors affecting grain cadmium concentrations.
• A predictive model for wheat grain cadmium (R²=0.53) was developed, while the model for barley was less effective (R²=0.22).
• Cultivar differences in cadmium uptake were significant for both crops.

Conclusions:

• Soil properties, particularly total cadmium and pH, are critical determinants of cadmium bioavailability in crops.
• The developed model can help predict wheat cadmium levels against EU regulations.
• Findings are relevant for managing cadmium in agricultural soils, including those amended with sewage sludge.