土对外源铜缓冲动力学模型研究  

Buffering Dynamic Model of Lou Soil under the Effect of External Copper Source

作　　者：陈会明[1,2] 马耀华[1,2] 和文祥 冯耀祖[1,2] 周芳庆 

机构地区：[1]西北农业大学基础科学系 [2]西北农业大学资源与环境科学系

出　　处：《西北农业大学学报》1999年第2期28-32,共5页Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：为了研究污灌土壤对外源铜的缓冲动力学规律，连续添加外源铜于土娄土中，在不同时间测定并求得缓冲量与缓冲速率，运用ＳＹＳＴＡＴ分析统计处理，结果显示：在低剂量外源铜作用下，随时间变化，缓冲速率基本上保持恒定；而在较高剂量外源铜作用下，缓冲速率随时间延长而减小。一元线性方程、抛物线方程及非线性阻尼振动方程对描述土壤缓冲速率及缓冲量动力学具有适应性；非线性阻尼振动方程适于表征高剂量外源铜作用下土壤缓冲速率动态及波动变化规律；土壤缓冲动力学方程与铜源强度。Copper solution was added into Lou soil successively in this paper in order to find the buffering dynamic law of soil polluted by heavy metal. Buffering rates and values were determined and calculated at different time.They were treated by using SYSTAT statistic software.The results were as folllows:Buffering rate remains a constant value with time lasting on the whole under the effect of lower external copper source,but decreases with time under that of higher external copper source.Linear equation with one unknown,parabolic equation and nonlinear damped vibration equation well fit to describe the dynamics of Lou soil buffering rate or value.The study testified that nonlinear damped vibration equation well fits to reveal the laws of dynamic and vibration state of Lou soil buffering rate.The paper showed that Lou soil buffering dynamic equations have relationships with the copper source,soil type and time.

关 键 词：LOU土 外源铜 缓冲动力学 

分 类 号：S153.4[农业科学—土壤学]