摘要
为了探究初始含水量对盐碱土饱和导水能力和盐分淋洗的影响,采用室内模拟试验,进行了6个不同初始含水量的定水头饱和导水能力试验。结果表明,盐碱土饱和导水率随初始含水量的增加而减小,二者呈显著的线性负相关;随初始含水量的增加,淋洗液pH值降低,电导率升高;随盐碱土饱和导水率的增大,淋洗液pH值升高,电导率降低,二者均与饱和导水率间呈对数关系。长期淹水状态下,盐碱土饱和导水能力平稳降低,盐分淋洗效果也变差。
The effect of initial water content on saturated hydraulic conductivity（KS10） and salt leaching of alkaline soil was researched using column leaching experiments in laboratory.Saturated hydraulic conductivity was measured at six different initial water contents.The results indicated that saturated hydraulic conductivity decreased with an increase in initial water content,showing a significant negative linear correlation.With an increase in initial water contents,the pH value decreased while electrical conductivity（EC） increased.The pH value in leachate increased but the EC decreased as the KS10 increased,both following logarithmic functions.In addition,the saturated hydraulic conductivity of alkaline soil and salt leaching efficiency decreased slowly in the condition of prolonged immersion.
出处
《水土保持通报》
CSCD
北大核心
2011年第3期71-74,共4页
Bulletin of Soil and Water Conservation
基金
"973"国家重点基础研究发展规划项目"生源要素的生物地球化学过程及其区域响应"(2007CB106803)
西北农林科技大学科研创新团队支持计划项目
"十一五"科技支撑计划"黄土高原水土流失综合治理工程关键支撑技术研究"(2006BAD09B06)
关键词
初始含水量
饱和导水率
淋洗液
pH值
电导率
initial water content
saturated conductivity
salt leachate
pH value
electrical conductivity
