Abstract:

In order to save fresh water resource, it is necessary to explore and utilize reasonably brackish water replacing fresh water to improve saline soils, the author investigated the desalination effect of heavily-textured coastal saline soils leached by brackish water in field plot experiment. The results showed that, in the well drained soils, using the brackish water with salinity of 3.5 g/L could lead to a fast and mark desalination effect. Taking saving water and desalination effect into account, the author suggested that an optimal leaching method was to sequentially leaching soil for three times with 1200 m3/hm2 brackish water. This method could decrease total salt content of soil (0-60 cm) to 3 g/kg and even below, make the desalination ratio to 60%, so that soil salt content met the requirement of common landscape plants.