Effect of Different Land Use Patterns on Physical Characteristics of Soil Water in Yellow River Wetland in Shanxi

[Objective] The aim was to study the effect of different land use patterns on physical characteristics of soil water in yellow river wetland in Shanxi Province.[Method] Yellow River wetland in Shanxi was selected as the research area,through comparison on the physical properties of the soil water under different land use patterns,the soil water physical properties and variation rules in the process of the wetland degradation was studied.[Result] From the wetlands,cultivated land to the abandoned salina land,soil bulk density of three different land use patterns increased with the increasing of soil depth.Soil bulk densities were ranked in the order of wetland(1.474 g/cm3),cultivated land(1.522 g/cm3) and the abandoned salina land(1.593 g/cm3).Soil became compacted increasingly;the indicators of soil porosity(total porosity,capillary porosity,non-capillary porosity) were also reduced with the change of land use patterns,in which,capillary porosity and total porosity reached the extreme significance level with the change of land use patterns,and non-capillary porosity reached significant level.The wetland degradation was exacerbated by changes in soil porosity conditions;the changes in max soil moisture capacity,capillary moisture capacity and min moisture capacity change under the three different land use types showed the same variation rules respectively.Compared with wetland,max soil moisture capacity of cultivated land and salina land was decreased by 5.7% and 22.3%,respectively;capillary moisture capacity decreased by 0.2% and 19.4%,min moisture capacity decreased by 2.7% and 15.9%.Among three land use patterns,both water storage capacity and water draught capacity of wetlands were better than that of cultivated land and salina land.Compared with that of wetland,the water storage capacity of cultivated land and salina land was decreased by 12.4% and 15.2%,and water draught capacity of wetland was decreased by 2.7% and 15.9%.[Conclusion] Taking reasonable steps to arrange the relationship between the forest land,farmland around the wetland,and the development of wetland areas is significant to the water conservation of Yellow River wetland conservation area,regulation of the hydrological cycle and the capacity of withstanding droughts and floods.