摘要
土壤水分入渗是自然界水循环中的重要部分,土壤水分入渗与土壤状况有很大的关系,应用Guelph渗透仪测定了黑河下游额济纳绿洲的土壤饱和导水率,并分析比较不同植被覆盖类型下测得的试验结果.结果表明:额济纳绿洲的几种典型土地利用方式下的土壤饱和导水率,其大小关系为:西戈壁>七道桥保护区沙枣林>二道桥胡杨林>林工站棉花地>二道桥柽柳林>梭梭苗圃地;通过因子的KMO(Kaiser-Meyer-Olkin)检验,影响土壤入渗的因子被归类为三个主成分,分别为土壤疏松程度因子、土壤水分因子、容重和阴阳离子总量因子,它们的主成分的累计贡献率为80.427%,其中粘粒质量分数因子对于土壤入渗的影响最大,土壤中阴阳离子总量因子和容重因子影响最小.
Permeation in soil is an important process in natural water cycle. It has quite relations with the soil conditions. The saturated hydraulic conductivity was measured by using Guelph Permeameter in Ejina Oasis in the lower reaches of Heihe River. The data measured under different conditions were compared. Using the principal component analysis function of statistics software SPSS, the effects of all factors, including soil moisture content, soil texture, soil salinity, soil organic and so on, on soil permeability were analyzed. The soil saturated hydraulic conductivities under different land use way were calculated out and compared. The order of the conductivities are in West Gobi 〉 in the narrow-leaved oleaster forest in Qidaoqiao〉 in the diversiform-leaved poplar forest in Erdaoqiao〉 in the cotton land of Forestry Work Station〉 in the Chinese tamarisk forest in Erdaoqiao 〉in the sacsaoul plant nursery. Firstly, the factor＇s KMO （Kaiser-Meyer-Olkin） examination was carried out and found that there were 6 factors with KMO of 0. 549, which were fitted basically the principal components analysis. Then three principal components, the soil loose degree factor, the soil moisture factor, the bulk specific gravity and the positive and negative ion total quantity factor, were extracted from these influence factors. The cumulative contribution rate of the three principal components was 80. 427G. It is found that the soil texture has the maximum influence, and the positive and negative ion total quantity factor, as well as the bulk specific gravity factor, has the minimum influence to the soil infiltration.
出处
《冰川冻土》
CSCD
北大核心
2008年第6期976-982,共7页
Journal of Glaciology and Geocryology
基金
国家杰出青年科学基金项目(40725001)
国家自然科学基金项目(40671010)
干旱地区内陆河流域水问题基础研究项目(CXTD-Z2005-2)资助
