Abstract: Soil water and salt is one of the most important factors in Salinization. There is a direct relationship between salt accumulation of saline soil and soil water content. An adequate knowledge of Soil water and salt spatio- temporal variability is critical for many scientific and practical applications. Taking Ebinur Lake area as the research unit,this paper analyzed the spatial variability of soil water salt in the three target areas of Ebinur Lake area, Oasis,Desert and Lake,by using statistics method. Results show that the salt gathered seriously on the surface soil of the oasis,desert and Lake region;from high to low,the contents of salt in the three target areas ranked as: Desert,Oasis and Lake area,while for water content,it is on the contrary. The coefficients of soil salinity variations ranged between 85%-150% in Oasis,Desert and Lake area,belonging to a high intensive variation;while the coefficients of water content variations were 55%-75%,belonging to a medium intensive variation. This indicates that the horizontal distribution of salinity in desert area is quite not uniform and the spatial heterogeneity was strong;while the soil water content is relatively uniform,and the spatial heterogeneity is weak. Soil salinity of 10-20 cm and 20-40 cm soil layers showed significant correlation(p<0.01)in Oasis,Desert and Lake area, with the correlation coefficients in oasis,desert and lake area of 0.913,0.966 and 0.941,respectively. The water contents of surface soil and sub layer had significant correlations in Lake and Oasis(p<0.01),with the correlation coefficients of 0.851 and 0.908,respectively. This indicates that there is water transfer between the soil layers of 0-10 cm and 10-20 cm in Oasis and Lake area,while this phenomenon is not obvious in the desert area. This may be related with the desert hot surface environment and soil properties. Ebinur Lake region is the center of the Eurasian continent and the core area of the Silk Road Economic Zone,soil salinization has seriously affected the development of the local economy. This study made a preliminary understanding of the autumn soil water salt distribution characteristics in Ebinur Lake region under different environment backgrounds,which can provide a scientific basis for the crop irrigation management and soil salinization control in this area.

Key words: environmental backgrounds, soil water and salt, variations, Ebinur Lake