花生农作物对污染土壤中重金属镉的富集研究

摘要

Flaming atomic absorption spectrometry are used to measure the content of cadmium in soil before and after planting peanuts we also measure the cadmium content of the roots, stems, leaves, shells, seeds of the peanuts in different cadmium content soil;at last we arrive at the result of cadmium metal enrichment in different peanut parts. The ability to absorb heavy metals in different parts of the peanut has the following grades:root>leaf>stem>seed>shell. And it was positively correlated with the content of cadmium in soil. Therefore, the peanut crops have good biological repairing effects on the soil polluted by heavy metal cadmium.%采用火焰原子吸收光谱法分别测定未种植花生前和种植花生后土壤中镉的含量，以及测定在不同镉含量土壤中花生的根、茎、叶、壳、籽实的镉含量，从而得出花生不同部位对镉金属的富集情况，结果显示：花生不同部位吸收重金属镉的能力具有以下规律：根>叶>茎>壳>籽实；并与土壤中镉含量呈现明显的正相关。因此花生农作物对受重金属镉污染土壤具有良好的生物修复作用。