咸水灌溉对土壤物理性质的影响

Studying on the effects of saline water irrigation on soil physical properties has important theoretical significance and practical value to formulate the reasonable irrigation model, to achieve efficient utilization of water resources and to the sustainable development of agriculture. By saline water irrigation field experiment, this paper studies the basic physical properties changes such as soil bulk density, porosity, and soil texture and influences on soil saturated hydraulic conductivity which are caused by soil salinity.Research shows that: (1) Saline water irrigation can cause the changes of soil bulk density and porosity, which changes the soil saturated hydraulic conductivity. With the increase of irrigation water salinity, soil bulk density is increasing, the porosity is decreasing, so as to make the saturated hydraulic conductivity decrease.(2)The saline water irrigation can lead to the change of the soil texture, especially the increase of clay content, so as to reduce the soil saturated hydraulic conductivity.