The Salinity Measurement Applied Research On The Wasteland Of Qitai By EM38

This paper studies the EM38Earth conductivity which is used to forecast the salinity ofsoil in qitai County, explored the salinity forecast modeling methods by EM38, analysis ofthe spatial variation trend and the zonality of soil salt content in the study area. For furtheranalysis of EM38measurement about the relation between accuracy and soil salinity.Through a large number of field test survey data acquisition and indoor soil sampleanalysis, established the related model between EM38ground conductivity (EM) and soilwater (1:5) extract electrical conductivity (EC), determine the best prediction model of EC;Along with the relationship between the local soil salt content and EC, with the EC forecastmodel and the relationship between EC and soil salt content type to calculate the salt contentof the soil.Results show that the EC’s best forecasting model is the comprehensive utilization ofvertical and horizontal prediction equation of two modes of measurement data, the spatialvariability of soil salinity is table of poly and zonality; Because the relation between theforecast errors by EM38and the salt content of the soil is logarithmic equations, so EM38prediction accuracy increasing with the soil salinity increases.