贵州普定陈旗堡地区土体主要理化性质与持水量相关性研究  

A Study on Water Holding-Capacity of the Soils in Chenqibao Area,Puding County,Guizhou Province

作　　者：王玉英[1] 阎长虹[1] 陈明珠[1] 郭军辉[1] 詹启伟[1] 郑军[1] 陈喜[2] 

机构地区：[1]南京大学地球科学系,南京210093 [2]河海大学水文水资源及水利工程科学国家重点实验室,南京210098

出　　处：《地质论评》2008年第4期550-556,共7页Geological Review

基　　金：国家973项目(2006CB403204);教育部博士点基金资助项目(编号20070284006)的成果

摘　　要：根据贵州普定陈旗堡典型喀斯特地区的生态特性,从水文地质与工程地质角度,借助土壤学对土壤水分特性的研究理论,对表层土壤20cm以下土层的土体物理化学性质与土体水分含量,即土体的持水量(water-holding capacity),进行了相关性研究。分析结果表明:土体颗粒成分、孔隙比、矿物成分含量等对土体水分含量均有影响。土体中粉粒含量较高而粘粒含量较少,且粒度分配不均匀时,土体水分含量相对较高;孔隙率高的土体水分含量较高;伊蒙混层矿物、伊利石和绿泥石等粘土矿物含量较高时,土体水分含量相对较高,而长石、碳酸盐等原生矿物含量较高时,土体水分含量相对较小。石英对于土体持水量影响不明显。Based on the Ecological Features of typical karst area in Chenqibao area, Puding County, Guizhou Province, according to basal knowledge of hydrogeology and engineering geology and agrological theories on soil moisture content, the correlation between physical--chemical characters and water content of the soils 20cm beneath surface layer is studied. The test results show that the soil water-holding capacity depends on grain size composition, void ratio and mineral composition of the soils. When the powder grain content of soil is higher, clay grain of content is less, and the size distribution of the soil grain is asymmetry, the water-holding capacity of soil is higher. And the water-holding capacity of soil is positive correlated to the void ratio and clay mineral content value, such as illite--montmorillonite interbeded mineral, illite and chlorite, while negative correlated to primary mineral content, such as feldspar and carbonate minerals. And quartz has no obvious effect on the water-holding capacity of soil.

关 键 词：土体水分含量 土体持水量 土体物理性质 土体化学性质 贵州 

分 类 号：P642.1[天文地球—工程地质学]