摘要
本文报导了镉在不同类型土壤和蔬菜中残留累积规律。研究结果表明,土壤镉残留量随着污水中镉浓度增加而增高,而蔬菜可通过根部吸收土壤中的镉,转移至叶和茎部。土壤中镉残留量与蔬菜中的镉具明显的正相关,与时间呈显著的负相关;蔬菜中镉的累积量依次为小白菜(叶)>萝卜(根)>莴苣(茎)>辣椒(果)>豇豆(豆)。
The residual laws of Cd in loam and vegetables have been studied. The results showed that Cd content in the soil increased as the concentration of Cd in irrigated sewage water increased. Vegetable roots can absorb Cd from soil and transfer Cd to stems and leaves. There was a significant positive correation between Cd contents in soils and vegetables, and a significant negative correlation between residual Cd contents in soils and time. The absolute amounts of Cd accumulated in the vegetables were in the following order of decrease.common cabbage (leave) >radish ( root ) > lettuce ( stem ) >hot pepper ( fruit ) >cowpea ( seed ) .
出处
《农村生态环境》
CSCD
1990年第2期40-44,共5页
Rural Eco-Environment
基金
四川省科学技术委员会应用基础研究基金
