摘要
通过大田环境-土壤-作物系统Cd行为的环境影响研究，初步发现，共存元素Cd、Cu、Ni、Pb、Zn对Cd元素在土壤-作物根系界面行为的影响表现为正效应，其影响顺序为：Cd>Pb>Cu>Zn>Ni；pH值、粘粒、粗粉粒含量与根系Cd含量呈负相关；磷和砂粒含量与根系Cd含量呈正相关；细粉粒、粗粘粒、有机质和CEC7含量与根系Cd累积量不相关；多元逐步回归分析表明：小麦根系元素Cd的吸收累积主要取决于Cd元素在土壤中的含量。
Through the investigation of the influence of soil properties on the behavior of cadmium (Cd) in soil-root system under the real field conditions, the results showed that, (1) Co-exist elements (Cd, Cu, Ni, Pb, Zn) acted the positive effects on the element Cd transportation in soil-root system, and the sequence for their influence was Cd>Pb>Cu>Zn>Ni. (2) The pH value and the contents of clay and silt had the negative effects, and the contents of P2O5 and sand had the positive effects on the Cd movement in soil-root system. (3) The transfer levels of unessential element Cd from soil to crop-root mainly depended on its amount in soil.
出处
《土壤与环境》
CSCD
2001年第1期14-16,共3页
Soil and Environmental Sciences
基金
国家自然科学基金重点项目!(49731010)
关键词
干旱区
土壤根系界面
土壤环境影响
镉行为
arid zone
interface between soil and root
Cd behavior influence of soil properties
