期刊论文

中文

中南林业科技大学学报

1673-923X

2000

20

2

1-6

10.3969/j.issn.1673-923X.2000.02.013

国家教委留学基金资助课题!“土壤微量元素有效性研究”的部分内容；

本校为第一机构

通过对中国南方具有代表性的山地黄壤、山地黄棕壤、红壤和赤红壤进行不同酸碱条件下镉平衡吸附 -解吸测定分析 ,确定了这 4类土壤镉元素吸附 -解吸的特征曲线 ,验证了个体土壤中镉元素容量、强度与土壤酸碱度的基本关系 ;应用阳离子交换原理 ,综合土壤镉吸附、土壤 p H值和沉淀作用对土壤镉活度的效应 ,提出了土壤镉元素吸附控制相理论 ,并建立了土壤镉元素容量 -强度相关性复合模型 ,在模型中将土壤镉的活度区域分为容量控制相、吸附控制相和沉淀控制相 3相 ;界定了 4类土壤 3相 p H的临界值 .土壤镉有效性模型的建立为防治土壤镉污染和控制土壤镉的有效性提供了理论依据和可靠便利的分析方法...

The present study was conducted to determine the Cd adsorption-desorption characteristic curves of four typical soil types in South China: hill yellow soil, hill yellow brown soil, red soil and crimison soil and to verify the correlations among soil Cd quantity, intensity, soil pH and related factors. And a multi mathematical model for predicting soil Cd availability was developed based on the soil cation exchange theory and soil Cd activity controlling phase concept. This multiple model consists of three phases: A. quantity controlling phase, B. adsorption controlling phase and C. precipitati...