榆林沙区无排灌条件盐碱地水盐运动规律研究

Water-Salt Movement Rule of Saline-Alkali Soil Without Irrigation and Drainage in Yulin Desert Region

研究分析了榆林沙区无排灌条件盐碱地水盐运动的时空变化,其水盐运行主要是随着季节、地形等因素的变化而变化。干旱季节,由于蒸发强烈,盐分随着水分的蒸发,处于上行状态,为积盐期;到了雨季,盐分又随着水分的下渗,处于下行状态,为淋溶期;由于地形的起伏变化,水盐运动也随着变化,随着地势的降低,地下水位升高,盐分含量增加。通过对榆林沙区无排灌条件盐碱地水盐运动的研究,为改良利用榆林沙区无排灌条件盐碱地提供了理论依据,奠定了一定的基础。

Space and time change on water-salt movement in saline-alkali soil without irrigation and drainage was studied and analyzed. Its water-salt movement mainly changed with the variety of factors, such as season and terrain ... etc.. In arid season, because evaporates intensely, salinity along with moisture content to upward movement, the saline-alkali soil is in accumulates the salty time; Under to the rainy season, salinity along with moisture content to under movement, the saline-alkali soil is in the eluviation time ; As a result of terrain change, the water-salt movement also along with the change, topography reducing, water table elevates, salinity content increase. Through the research on water-salt law of motion in does not have the irrigation and drainage condition saline-alkali soil of Yulin desert region, we have provided the theory, basis and laid the certain foundation for the improvement of saline-alkali without irrigation and drainagesoil in Yulin desert.