Abstract
The present paper describes the heat, moisture and salt transfer in a soil column with a salt affected layer due to watering-evaporatiocny cles, e specially the leaching and the re-accumulation of soil salinity at the soil surface under different watering conditions.
The experiment was carried out by changing the watering frequency and the amount of each watering under the same total amount of watering. A fter watering on the soil surfacec overed by a salt affectedl ayer, the time rate of the re-accumulationo f soil salinityi n the surfacel ayer is large but the durationo f the re-accumulationis short, when the amount of watering is small. On the other hand, after watering on the salt-free soil layer, on which lies an intermediate salt affected layer, the re-accumulation of soil salinity in the surface layer becomes more distinct as the amount of watering and the watering times increase.
The present experimental resultsimply the importance of the water management to prevent the second salinization.
