Abstract

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Title:: Effect of Different Buried Depth on Soil Water and Salt Movement During Moistube-irrigation

Author(s):: LI Zhaoyang1; 2; ZHANG Qiangwei1; WANG Xingpeng1; 2; (1.College of Water Resource and Architectural Engineering,Tarim University,Alar,Xinjiang 843300；2.Key Laboratory of Modern Agricultural Engineering,Tarim University,Alar,Xinjiang 843300)

Keywords:: saline-alkali soil; buried depth; moistube-irrigation; soil water and salt

Abstract:: Taking the salinized soil in south of Xinjiang as an example,a laboratory simulation test was carried out to investigate the effects of different buried depths (5,10,15,20 cm) on the soil water and salt distribution characteristics.The results showed that,in the early stage of irrigation，the cumulative infiltration reduced gradually with the buried depths．In the later stage of irrigation，the flow of miostube-belt which relatively shallow buried depths was reduced;the average infiltration rate in the early stage of irrigation was higher than the later.In the horizontal direction,each horizontal distribution of moisture area under different buried depths was symmetric about the center of buried moistube.Symmetric about the center of buried moistube.Each vertical distribution of moisture area under different buried depths was under the buried depths.The maximum soil moisture content was reduced gradually with the increasing of buried depths.the moisture area of shallow soil and soil moisture content assumed inverse ratio connection with the increasing of buried depths.The influence of buried depths on the soil salt in horizontal distribution were small,the location of soil desalination area and salt accumulation area decreased with the increased of buried depth.The average of soil salt content was increased gradually and the desalting rate decreased gradually with the increased of buried depth.