Research on the differences in cadmium and arsenic accumulation among different wheat cultivars under cadmium and arsenic co-contamination
Co-contamination of cadmium(Cd)and arsenic(As)in soil often results in elevated levels of Cd and As in wheat grains.This study examined 55 wheat cultivars(varieties)from the Huang-huai-hai Winter Wheat Region.Field experiments were conducted in typical Cd and As co-contaminated areas in the North China Plain(Plot S1:moderate contamination;Plot S2:severe contamination)to explore the varietal differences in Cd and As content in wheat grains.Additionally,this study conducted a comprehensive analysis of Cd and As content in wheat grains as well as thousand kernel weight,aiming to identify wheat varieties with low accumulation of Cd and As.Results showed that Cd content in wheat grains from plots S1 and S2 ranged from 0.15 to 0.76 mg/kg and 0.24 to 0.87 mg/kg,respectively,while the As content in wheat grains ranged from 0.052 to 0.14 mg/kg and 0.18 to 0.45 mg/kg,respectively.Significant differences were observed in Cd and As accumulation among different cultivars.The Cd contents in wheat grain exceeded the national food safety standard(0.1 mg/kg,GB2762-2022),while As contents in wheat grain remained below the standard value(0.5 mg/kg).Therefore,in fields contaminated with both Cd and As,controlling Cd contamination is of primary concern.in fields contaminated with both Cd an As Ultimately,the wheat variety'Yingbo 700'(YB700)was identified as low accumulation of both Cd and As and relatively high yield,Suggesting it as a cultivation in fields with moderate to heavy co-contamination of Cd and As in the Huang-huai-hai region.Also,it is recommended to apply foliar inhibitors and soil passivators to ensure the safe production of wheat.
万方数据
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