本文以我国北方平原的土壤次生盐化为背景，对土壤中饱和—非饱和水的水—热—盐一维运动模型进行了数值模拟。
With the background of soil salinity in the plain of North China, a water-heat-salt movement of soil water in unsaturated-saturated region is studied by numerical simulation.
持续放牧已经成为一种稳定影响盐化草场水盐空间分布的结构性因素，使盐化草场的水盐空间异质性减弱。
Continuous grazing is a factor that impacts on the spatial distribution and weakens the spatial heterogeneity of soil moisture and salt content in saline grassland.
冻融期间盐沼湿地水盐迁移的热力学机制是松嫩平原土壤盐化发生机制的重要组成部分。
The thermo dynamics mechanism of water and salt transportation in the salined wetland during the freezing and thawing period is substantial to the geographical occurrence mechanism of salinized soil.
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