Abstract:Field experiments were conducted to explore the characteristics of cadmium uptake in various organs(roots, stems, leaves and grains) of eight maize varieties exposed to varying cadmium concentrations across different regions. The study involved comparing cadmium(Cd) content across organs at maturity, and performing correlation analysis on Cd content in each organ. Results showed that in Liuyang, the enrichment coefficients of Cd in roots, stems, leaves and grains of different varieties ranged from 0.85 to 1.09, 0.44 to 0.86, 0.64 to 1.36 and 0.04 to 0.25, respectively. The transport coefficients of Cd in stems, leaves and grains ranged from 0.42 to 0.91, 0.59 to 1.44 and 0.05 to 0.27, respectively. Correlation analysis indicated a positive relationship between stems and leaves. In Yunyuan, the enrichment coefficients of Cd in roots, stems, leaves and grains of different varieties ranged from 3.00 to 4.12, 1.93 to 3.20, 2.18 to 3.96 and 0.16 to 0.94, respectively. The Cd transport coefficients of stems, leaves and grains varied from 0.63 to 0.86, 0.61 to 1.30 and 0.04 to 0.24, respectively. Correlation analysis showed an extremely significant positive correlation between Cd contents in stems and leaves, as well as stems and grains. Statistical analysis revealed two types of Cd accumulation distribution in organs: (1) Cd contents of leaf, root, stem and grain decreased successively; (2) Cd contents of root, leaf, stem and grain decreased successively. Notably, Cd content of Xiangnongyu22 grains grown in Liuyang at this Cd concentration exceeded the “National Food Safety Standard Limits of Contaminants in Foods”. However, Xiangnongyu22 planted in Yunyuan met the standard, and the remaining seven varieties grown in both regions complied with the “National Food Safety Standard Limits of Contaminants in Foods”.