土壤容重对红壤水分溶质运移特征影响的试验研究  

Influence of Bulk Density on the characteristic of Water Solute Transport in Red Soil

作　　者：李志明[1] 周清[1] 王辉[2,3] 卢霞[2] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128 [2]湖南农业大学工学院,湖南长沙410128 [3]中国科学院水利部水土保持研究所/黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100

出　　处：《水土保持学报》2009年第5期101-103,共3页Journal of Soil and Water Conservation

基　　金：国家自然科学基金(40801107);湖南省教育厅科学基金(07B033);湖南农业大学人才基金(06YJ28)

摘　　要：通过测定南方第四纪红壤不同土壤容重条件下,土壤水分水平入渗过程和溴化钾溶液穿透曲线,分析了土壤容重对入渗速率、土壤饱和导水率的影响;根据CDE模型、运用CXTFIT软件对溴离子的穿透曲线(BTC)进行拟合,并求其运移参数。结果表明:土壤水分运移速率和土壤饱和导水率随着红壤容重增大而减少;随着容重增大,Br-的水动力弥散系数D增大,阻力因子R也增大。By measuring the horizontal infiltration and breakthrough curve of KBr solute in the Quaternary Red Soil,this paper analyzed bulk density＇s effects on infiltration velocity and soil saturated hydraulic conductivity;Besides,CDE model and CXTFIT program were used to simulate the breakthrough curves（BTC） and determine transport parameters.The results shows that water transport velocity and soil saturated hydraulic conductivity decreased with the increase of soil bulk density;But the dispersion coefficient and retardation factor increased with the increase of soil bulk density.

关 键 词：红壤 土壤容重 水分入渗 穿透曲线 

分 类 号：S157.1[农业科学—土壤学]