Prediction of Cd Accumulation in Wheat (Triticum aestivum L.) and Simulation Calculation of Lime or Zn Fertilizer Remediated Soil

Soil Cd contamination to wheat raise wide concerns over food safety. It is essential to find the key factors affecting Cd accumulation in wheat and to establish a predictive model. The effects of pH, Zn, Ca, and DOM on the accumulation of Cd in wheat were investigated using hydroponic experiments. The results showed that Zn was the most important factor inhibiting Cd uptake in wheat. Models were developed to predict the Cd contents in wheat tissues based on the ion concentration. Meanwhile, the available Cd contents in soil were predicted using a geochemical multi-surface model (MSM) which is suitable for various soils and conditions. The combination of the hydroponic accumulation model and MSM exhibits good predictions of wheat-Cd (R-2 = 0.822-0.862, RMSE = 0.317-0.533). The results of this study can quantitatively predict the accumulation of Cd in wheat and provide a reference for soil remediation and safe wheat production.

Automated summary

Soil Cd contamination is a major concern for wheat and food safety. This study investigated the key factors affecting Cd accumulation in wheat and developed predictive models. The results showed that Zn was the primary factor inhibiting Cd uptake in wheat. Models were developed to predict Cd contents in wheat tissues based on ion concentration, and a geochemical multi-surface model (MSM) was used to predict available Cd contents in soil. The combination of the hydroponic accumulation model and MSM provided good predictions of wheat-Cd. The findings of this study have implications for soil remediation and safe wheat production.