蓄水条件下土壤-水体水盐运移的室内试验

Salt and Water Movement of Soil-Water Body under Storage Condition

土壤水盐运移规律的研究是目前土壤物理学、农田灌溉学研究的一个重要方面,也是防治盐碱化、改良盐渍土的核心问题。蓄水条件下水体与土壤界面之间必然存在着盐分的迁移。通过实验室模拟田间实际情况,观测水体—土壤界面之间的水盐运移动态,得出水体—土壤界面盐分迁移的基本规律。采用"不排而蓄"的方法,监测不同时段土壤含盐量和土壤不同层段的含盐量。分析结果表明:蓄水条件下土壤表层盐分降低,底层盐分增多,从而充分说明在蓄水条件下,水体—土壤界面间的循环压盐原理能够降低土壤表层的盐分,加速土壤耕作层脱盐,降低含盐量,保证作物的正常生长。

Transport of soil water and salt is an important factor of soil physics, with relation to irrigation and soil reclamation. On the interface of water body and soil, there is a salt movement under storage condition. The basic law of water body-soil movement was studied with the mothed of ＂non-exclusive and storage＂ and monitoring soil salt in different time and layers. The result showed that the salt moved to the bottom of soil. The circulation pressure of water body and soil bowndary zone can decrease top soil salt. Through the simulation experiment useful data could be obtained, for the and harmonious ecological management of the Lubotan.