Abstract:

In order to make rational and effective use of water resources, the rapid improvement of coastal saline soil, an indoor soil column experiment was carried out to investigate the water and salt transporting characteristics of coastal saline soil, which was leached with different irrigation methods. The results indicated that the soil infiltration rate of saline water was obviously higher than that of saline-fresh water alternate and fresh water. The soil salinity descended significantly after irrigation. The soil desalinization effect was the best and the soil desalinization rate was the fastest which with the method of leaching first by saline water then by fresh water. The soil desalinization rate by leaching with fresh water was the slowest. After irrigation, soil pH increased in the three treatments soil, leaching by fresh water increased greatly and increase of minimum was leaching first by saline water then by fresh water. Among the three irrigation methods, the method of leaching first by saline water then by fresh water had the best comprehensive effect of leaching coastal saline soil. The research could provide the scientific method to leach salt and improve the saline soil in the saline-alkali areas which had shortage of fresh water resources and abundance of the saline water resources.