土壤水分的运行不仅影响土壤墒情的好坏以及作物的水分和养分的供应状况,还决定土壤中盐分的移动和积累。虽然,土壤中盐分的移动与水分的运行不完全一致,如由于土壤的吸附以及离子交换等性质,盐分的移动速度较水分运行的速度慢,以及在土层中有盐分浓度梯度存在时,会发生盐分的分子扩散等现 The operation of soil moisture affects not only the quality of soil moisture and the supply of water and nutrients to the crop, but also the movement and accumulation of salt in the soil. Although the movement of salt in the soil is not exactly the same as the operation of the water, the movement speed of the salt is slower than that of the water due to adsorption and ion exchange of the soil, and there is a gradient of the salt concentration in the soil Molecular diffusion of salt occurs now