Spatial Variability Analysis of Soil Salt and Its Component Ions in Qinghai Lake Region

this paper studies spatial variability of soil salt and its content ions around Qinghai Lake region. Research results show that, test on normal distribution of soil salt and its ion content using frequency distribution histogram and Kolmogorov-Smirnov, soil salt and other ions comply with normal distribution except for Cl- with normal distribution after transformation and CO32- with lognormal distribution. Analysis using Geostatistics shows that total soil salt, HCO3- and Cl- comply with exponential model and other ions with spherical model. Content of soil salt and its other component ions around Qinghai Lake region ranges from 6.00 -30.10 km, K+ varies greatly among the ions, Na+, Ca2+,CO32− and SO42− changes less. The ranging scope of total soil salt is 12.00 km, which implies a suitable soil salt sampling space of about 12 km around Qinghai Lake region.