Abstract:

In order to screen optimum varieties of dry grain crops with low accumulation of heavy metals in polluted farmland, we planted 10 varieties each of drought-tolerant crops, such as sorghum, maize, and soybean on farmland contaminated with heavy metal compounds, and analyzed the contents of heavy metal elements such as Cd, Ni, Cu, and Zn in the grains of these crops by conducting field experiments. The results showed that the preferred sorghum variety with low Cd accumulation was Jinnuo 3, the preferred maize varieties with low Cd accumulation are Zhenuoyu 86 and Zhetian 19, and the preferred soybean variety with low Cd accumulation was Zhechun 8. Sorghum varieties with low accumulation of Cd, Ni, Cu, and Zn were Jinnuo 3 and Jinza 31, maize varieties with low accumulation of Cd, Ni, Cu, and Zn were Zhenuoyu 18, Zhenuoyu 86, and Yinnuo 1, and soybean varieties with low accumulation of Cd, Ni, Cu, and Zn were Zhechun 8 and Liaoxian. The results of this study can provide a scientific basis for selecting dry grain crop varieties with low accumulation of heavy metals in polluted farmland in the Zhejiang region.

Key words: safe utilization of polluted farmland, low accumulation of heavy metals, variety screening, dry grain