镉、锌、铅复合污染对菠菜的影响

Effect of Compound Pollution of Cadmium,Zinc and Lead on Spinach in Brown Earth.

本文采用盆栽试验，研究了棕壤中镉、锌、铅复合污染对菠菜的影响．结果表明，共存元素协同使菠菜的产量降低，它们的影响顺序是锌＞镉＞铅。供试元素在菠菜可食部分的累积除了受到本身性质和添加量的影响外，还受到元素相互作用及土壤中重金属存在形态的影响，后者的影响较为复杂。菠菜可食部分对重金属的累积率顺序为镉＞锌＞铅，镉对人体的潜在威胁最大。

Abstract Pot experiment was conducted to study cadmium,zinc and lead compound effects on phytotoxicity,growth and accumulation of spinach grown in brown earth.The results showed that the coexisting elements had a synergism effect on spinach with a toxicity order:Zn>Cd>Pb.Tissue accumulation of heavy metals in the edible parts of spinach depended on the their doses,forms in soil and interaction with a accumulation rate order.Cd>Zn>Pb.Cd in brown earth had the highest potential toxicity to human.