Changes in Soil Salinity in the Ekhiin-Gol Oasis(Mongolia)According to Monitoring Data of 1977 and 2001

作     者：E.I.Pankova D.L.Golovanov 

作者机构：Dokuchaev Soil Science InstitutePyzhevskii per.7Moscow119017Russia Geographical FacultyMoscow Sate UniversityVorob'evy goryMoscow119899Russia 

出 版 物：《干旱区地理》 (Arid Land Geography)

年 卷 期：2005年第28卷第6期

页      面：713-722页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：俄罗斯基础研究基金会(RFBR)资助 EC Copernicus program 

主　　题：蒙古 监测数据 土壤 盐分 绿洲 

摘      要：Specific features of soil salinization in the Ekhiin-Gol oasis,one of the largest oasis in the Transaltai Gobi of Mongolia,were first studied in *** was shown that recent hydromorphic solonchaks forming as a result of modern salt accumulation predominate in the soil cover of the oasis.A detailed map of soil salinization was compiled,and specific features of salinization in different soils of oases in the Gobi Desert were *** 2001,the soil survey of the oasis was repeated,which made it possible to trace the dynamics of soil salinization within a 25-year-long *** comparison of the data on the soil salinization in the Ekhiin-Gol oasis obtained in 1977-1978 and 2001 has shown that the main part of the oasis area occupied by hydromorphic solonchaks has not undergone significant changes in the degree and character of soil *** rise in the salinity of the oasis soils is most pronounced in the area of the initially(1977) nonsaline or slightly saline meadow and meadow swamp hydromorphic soils and in the area of the formerly irrigated and then abandoned *** rise in the degree of the soil salinization may be caused by both natural factors(a drop in the general water supply of the oasis) and natural-anthropogenic factors(a decrease in the discharge of the springs and a lower amount of water accumulated on the soil surface in the form of icings in the winter seasons).The secondary salinization of the irrigated lands is locally *** is probably related to saline rocks underlying the loesslike *** rocks become the source of soil salts as a result of *** salinization is sometimes actively developed upon irrigation with saline water from deep wells within the irrigated *** tendency for an increase in the degree of soil salinization may also be related to the plant cover degradation as a result of *** leads to the formation of barrens,which enhances the physical evaporation from the soil surface and