Saline-alkali Soil Storing Salt Condition In Songnen-Plain And The Space Distribution Research Of Salt Supplying Type

Saline-alkali soil is the floorbord of solonization course and salinization course soil.Soilsalinization and secondary salinization have been important entironment problem,whicheffected industry and agriculture badly and more and more been thought much of.But people have much error advice about saline-alkali soil storeing up salt.In the face of thetradition view ,that Saline-alkali soil salt's storeing was controled by the burried depth ofgroundwater and salt mostly rooted in groundwater or the hangover of parent rock, the paperchoiced the saline-alkali soil in Songnen plain as study object,with GIS & Excel etctechnology 's sustain,it analysed and studied five storeing salt condition and the relationbetween them and saline-alkali soil storing salt.The article discussed the supply style ofSongnen plain saline-alkali soil salt & the distribution rule of these styles.The study willsurport thesory gist for saline-alkali soil subarea father.Research result indicated:Firstly,the form of Songnen plain saline-alkali soil had much connection withclimate,terrain,geology,water character and vegetation.Secondly,the salt supply type of Songnen plain saline-alkali soil have three :Surfacewater salt supply type,Groundwater salt supply type, Surface water-ground water saltcomplex supply type.Thirdly,the salt supply styles have spatial distribution rule:Surface water salt supply type, mainly distributed at in alluvial fan tableland close flowdepression , lower groundwater table wind erosion depression under mound at the terraceplain and have huge thick lake deposit old lake basin depression,And floodplain salinized soildevelopment intact, salinized soil itself has taken shape in the area of the impermeablestratum . Surfacewater -ground water salt complex supply type , mainly distributed in theflood plain , and the vast salinized soil area of the terrace plain.Groundwater salt supply type, mainly distributed in the terrace plain where groundwateris verry abundant and burying shallowly, but the surfacewater is very short .Fourthly,according to the distribution in the relief unit of every salt supply types , dividefor the corresponding sub-type again. The surfacewater salt supply type includes the sub-typeof surface water salt supply of alluvial fan, the sub-type of the terrace plain surface water saltsupply, the sub-type of the surface water salt supply in the floodplain;The groundwater saltsupply type has sub-type of terraces plain groundwater salt supply;Surfacewater -groundwater salt complex supply type includes the terrace plain surfacewater -ground water saltcomplex supply sub-type, the flood plain surfacewater -ground water salt complex supplysub-type.