Zn-Cu Interaction Affecting Zn Adsorption and Plant Availability in a Metal-Contaminated SoilA

作     者：D. L. Rimmer and Luo Yongming(Department of Agricultural and Environmental Science, Universitg of Newcastle open Tyne, Newcastle apon Tyne NE1 7RU UK) 

作者机构：Department of Agricultural and Environmental Science University of Newcastle upon Tyne Newcastle upon Tyne NE1 7RU United Kingdom 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：1996年第6卷第4期

页      面：335-339页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 09[农学] 0903[农学-农业资源与环境] 120405[管理学-土地资源管理] 090301[农学-土壤学] 

主　　题：metal phytotoxicityl metal-contaminated soil plant-available Zn Zn adsorption Zn-Cu Interaction 

摘      要：In a previous greenhouse experiment, we showed that there was an interaction between Cu and Zn, which affected growth and metal uptake by young barley plants grown on soil to which Cd, Cu, Pb, and Zn had been added. We suggested that the underlying mechanism was the control of the amount of plant-available Zn by competitive adsorption between Cu and Zn. In order to test this hypothesis, the adsorption of Zn alone, and in the presence of added Cd, Cu and Pb, has been measured using the same soil. Following adsorption, the extractability of the Zn in CaCl2 solution was measured. The adsorption isotherms showed that of the added metals only Cu had a large effect on Zn adsorption. The effect of Cu was to reduce Zn adsorption and to increase the amount of CaCl2-extractable (i.e. plant-available) Zn, in agreement with the conclusions from the greenhouse experiment. The magnitude of the effect of Cu on plant-available Zn was similar in both experiments.