关键词: 盐碱地, 水盐运动, 河套平原

Abstract:

Permanent sample plots were located in solonchak area in Hetao Plain, Inner Mongolia. The water-salt movement was observed in unfreeze periods during 3 years, and over 400 soil and ground water samples were measured. It is found that the dynamics of salt in soil can be divided into following stages: evaporation-salinization stages in spring and autumn, leaching-desalinization stages in summer(because of rainfall and irrigaiton), and relative stable stages in winter. The fluctuation of ground-water table was closely related to the water amount of irrigation. Mineralization of ground-water and pH value was rather stable. Salt accumulation in the top soil layer of solonchak was existed in experiment area over the years.

Key words: Solonchak, Water-salt movement, Hetao Plain