| In order to know the impact of salinization on soil resistivity, have put up the soil samples with different salt type and concentration and measured the electrical resistivity of eah treatment using the four-electrode method in laboratory, also analyzed the impacts of soil water content, salt concentration and single, double salt composition on the soil electrical resistivity. The research results showed that: The soil electrical resistivity was decreased from 16.08 Ω·m to 4.25 Ω·m with increase of the soil moisture content assumed a logarithmic function; and it was decreased with increase of the salt concentration assumed an exponential function. The soil electrical resistivity was decreased from 2.04 Ω·m to 0.20 Ω·m with NaCl, it was decreased from 2.89 Ω·m to 0.39 Ω·m with Na2SO4. The composition of different salt type still present notable difference on the soil electrical resistivity. When the salt content was 0.1%, under the action of carbonates, sulfates, chlorides and chloride-sulfate, the soil resistivity was 4.40, 3.64, 2.05 Ω·m and 2.25 Ω·m, respectively. The carbonate had obvious effect on soil resistivity. When the salt content was 0.5%, 1.0%, 1.5% and 2.0%, the sulfate had obvious effect on soil resistivity, the relative soil resistivity was 1.72, 1.03, 0.74 Ω·m and 0.58 Ω·m, respectively, and for the chlorides salt, the soil resistivity was 0.59, 0.36, 0.27 Ω·m and 0.21 Ω·m, respectively. The soil moisture content and the total amount of salt were the important factors affecting soil resistivity. The soil resistivity was assumed a power function decrease with the increase of the NaCl and Na2SO4 content; The different salt types of single and double, existed different impact on soil resistivity. |