蔬菜对土壤镉铜锌富集能力的研究

调查了福建部分污染严重地区不同蔬菜对镉、锌、铜的富集能力。结果表明蔬菜对镉的平均富集系数为0.017,锌的平均富集系数为0.116.铜的平均富集系数为0.014。蔬菜对镉的富集系数的品种间差异最大,达315倍,远高于锌和铜的富集系数的品种间差异。茭白、豇豆和莲藕对镉的富集能力较低,可作为镉污染土壤优先选种的蔬菜品种,而青包菜、白包菜、芥菜、空心菜、芋头等对镉的富集系数较高,不宜在镉污染土壤上栽培。

Study on the concentrating characteristics of vegetables for Cd, Cu and Zn

The concentrating characteristics for Cd, Cu and Zn of the edible parts of 12 vegetables grown on heavily metal-polluted soils in Fujian province was investigated. The average concentrating coefficients of the vegetables for Cd, Cu and Zn were 0.017, 0.116 and 0.014, respectively. The difference between the highest and the lowest Cd concentrating coefficients was 315 times, much higher than those for Cu and Zn. Wild rice stem, cowpea and lotus had the lowest concentrating coefficients for Cd, which can be chosen for planting on Cd-polluted soil. Leaf mustard, taro, water spinach should not be grown on Cd-polluted soil because they showed a strong ability to uptake Cd from soil.