Effects of seasonal freeze thawing on water and salt movement in saline lands
Soil salinization is a major obstacle restricting the agricultural development of arid areas, it is also an important factor affecting the stability of the oasis ecological environment(Tian,C.Y.et al.2000).The formation of saline soil is closely related with water and salt movement.In-depth studies on soil water and salt movement mechanism is the theoretical basis for prevention of soil salinizaton and improvement of saline soil (Wang, Z.Q.et al.1993).Seasonal freeze thawing processes are the main driving force for the formation of soil salinization in arid areas(Zhang, D.F.et al.2001).Under the control of temperature, water and salt movement showed a special pattern.Many studies have been done in this field (Thunholm, B.et al.1989;Marion, G.M.1995;Zhang, D.F.et al.2005;Li, R.P.et al.2012;Wang, Y.J.et al.2012), however,the effect of the freezethawing processes on the coupling of soil water and salt and heat regulation mechanism is still unclear.In this study, we chose typical salt barelands in the Manas River basin and measured soil moisture, salinity and temperature dynamic in 160cm soil profile from January to May, 2010.Then we analyzed the regulation effect of the heat transfer on water and salt movement during freezing, thawing, and evaporation period.
Guangqiang Fu Jianyong Wang Shaoming Wang Gengrui Wang Youcai Xiong
School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu, China School of Life Sciences, Shihezi University, Shihezi 832000, Xinjiang, China Department of Natural Resource Sciences, McGill University, H9X 3V9, Quebec, Canada
国际会议
兰州
英文
168-173
2013-10-14（万方平台首次上网日期，不代表论文的发表时间）