中文摘要：

＂改排为蓄＂是盐碱地治理方法的重大创新,为揭示蓄水条件下蓄水沟水体与相邻土壤之间的动态循环压盐机理,进行水体与土壤之间盐分运移试验。通过对蓄水水位70cm→40cm→20cm的循环变化,研究水体和不同土层盐分运移规律。试验结果表明：蓄水水位由高到低循环变化对水体与土壤之间盐分运移有着至关重要的作用,当蓄水位以70cm→40cm→20cm的循环变化时,0-65cm土层含盐量逐渐减少,65-100cm土层含盐量逐渐增加。通过蓄水水位升降的循环变化,可以使表层土壤的盐分逐渐减少,底层土壤的盐分逐渐增大,改变土壤盐分在垂直方向的空间分布,逐步向下循环加速压盐。因此,循环压盐机理是成立的,＂改排为蓄＂治理模式是可行的,可以达到盐碱地改良的效果。

英文摘要：

The ＂change drainage to impoundment＂ is a significant innovation in saline land treatment method,to reveal mechanism of cyclic pressure salt,salt movement experiments were carried out in the storage condition.Through the cycle changes of water level 70 cm→40 cm→20 cm,water salt and soil salt movement law were studied.The results showed： the cycle changes of water level is an important role to water and soil salt movement in the storage condition,through cycle changes of water level 70 cm→40 cm→20 cm,0-65 cm soil layer salt content is decreased gradually,65-100 cm soil layer salt content is increased gradually.Through the water level is being changed,salt content of surface soil is reduced gradually,salt content of bottom soil is increased gradually,spatial distribution of soil salt is changed in the vertical direction,soil salt is pressured gradually from up to down.Therefore,the mechanism is establishment,governance model is feasible,the effect of saline land improvement can be achieved.