[ Objective ] The aim was to study the process of absorption and accumulation characteristics of heavy metal Cd2+ in soil and banana system. [ Method] Taking sandy latosol as test soil, banana as test plant, potted cultivation was used to study the characteristics of the concentration and accumulation index of Cd2+ in the soil, root, stem and leaf of banana. [ Result ] The results showed that concentration of Cd2+ had great effects on the enrichment effect in banana seedling, the concentration of Cd2+ was higher, and the enrichment coefficient of banana seedling was smaller. The accumulation of Cd2+ in different parts of banana seedling was very different. Cd2+ were absorbed and attributed in root largely, and few were transported to the above ground part. [ Conclusion] This study can provide theoretical basis for recognizing heavy metals residue in banana seedling, health risk and pollution control.%[目的]研究重金属Cd在土壤-香蕉幼苗体系中的迁移分配规律.[方法]以沙质砖红壤为供试土壤,以香蕉为试验植物,采用盆栽模拟试验方法研究了Cd在土壤、香蕉根系、茎、叶中的浓度和富集系数的变化规律.[结果]不同Cd处理浓度对香蕉苗体内Cd富集效果有很大的影响.当低浓度Cd处理土壤时,富集系数最大,高浓度时富集系数最小.香蕉苗不同部位吸收累积重金属Cd有明显差异,大部分累积在根部,向茎和叶迁移的量较小.[结论]该研究可为科学认识香蕉中重金属的残留问题、健康风险及其污染控制提供理论依据.
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