Spatial Variability Of Soil Salinity And Its Effecting Factors In Boertala River Basin

As a typical inland arid area closed salt lake, environmental degradation Ebinurbecome this year ’s research focus. Bortala River is one of the major rivers supply, thechanges directly affect even the entire northern region Ebinur living environment. Inthis paper, Bortala River Basin as the research object, the field investigation andsampling, based on a descriptive statistical analysis, correlation analysis, principalcomponent analysis and geostatistical analysis, the depth of0²0cm spatial variabilityof soil salinity were studied and explores the spatial variability of soil salinity ledwatershed ’s natural and human factors research for soil salinization in arid areas toprovide improved prevention and treatment of some scientific basis. Through researchwas supported by the following main conclusions:（1） Test of normal distribution and statistical analysis showed that: the elements ofthe elements of soil salinity, apart from PH and HCO₃^-subject to the normaldistribution, a total salt content of soil salinity, conductivity and other ions are notnormally distributed. Region-wide total salt content between0.27¹25.81g/Kg, meanof6.506g/Kg, is a moderately saline soil. PH values between6.502⁸.588and itsmean7.066, indicating that for neutral soils saline soils in the study area. In the studyarea（2） Salt variable correlation analysis and principal component analysis showedthat total salt and Cl^-,SO₄^2-, Na⁺, K⁺, Ca²⁺, Mg²⁺were achieved very significantpositive correlation, and higher correlation coefficients, and HCO₃^-of highlysignificant negative correlation. Strongly surface accumulation of sulfates, chloridesand sulfate dominated. First principal component, the second principal component, thethird cumulative contribution of the main city of85%or more. First principalcomponent represents the comprehensive status of soil salinization and alkalization ofsoil characteristics are representative of the second principal component, the thirdprincipal component represents an indicator of soil structure. （3） Semi-variogram analysis showed that: the elements of soil salinityautocorrelation distance between the11.6²52.53m, quite different. Total salt,conductivity, PH, Na⁺, K⁺, Mg²⁺, Cl^-Gaussian model with better meet the distribution,SO₄^2- line with the spherical model nugget to sill ratio of0.032²4.39%, with astrong spatial relevance, a large degree of structural factors, HCO₃^-fitted exponentialdistribution model, Ca²⁺Gaussian model nugget and sill ratios were48.94%,29.71%with moderate intensity spatial correlation, and its distribution by structural factorsand random factors together.（4） From spatial distribution pattern of the elements of surface soil salinity andsoil salination type, generally speaking, the spatial variability of soil salinity areshown from southwest to east law of incremental, non-saline soil, it covers a total areaof54.75%, mainly in the West and southwest of the basin. Followed by mild salinesoils, its area total area of22.99%, total area of salinized soil in area of13.08%,lightly salinized soils and moderately saline soils occur in the study area in Central;severe salinized soil covers a total area of8.74%, saline soil area of only1.44%percent of total area. Severe salinization soil and salt in a wide area in the eastern part ofthe study area.（5） Bortala River Basin spatial distribution of soil salinity differences aredifferences in spatial distribution of climatic conditions, different slope, aspect, soiltype and texture differences, salt accumulation in plants and other natural processesand land use types and the different crop types, irrational irrigation, increased use offertilizers and other common human activities have an impact on the soil water andsalt movement results.