Effects of Adjustment Measure of Water-salinity on Soil Salinization in the Coastal Area of North Jiangsu Province

Available cultivated land which existing soil salinization risk is largely distributed in the coastal area of north Jiangsu Province,field plot experiments were conducted there for purpose of studying the effect of adjustment measure of water-salinity on improving soil salinization.The results showed that both gypsuming and straw mulching treatments could decrease SAR in each soil layer thus could lower the trend of the soil alkalinization and reduce the soil salt content when irrigated with brackish water of 3 g/L.Gypsuming treatment could to some extent improve soil salinization condition while straw mulching treatment could not control the increase of soil content under the condition of brackish water of 6 g/L irrigation.When irrigated with 10 g/L brackish water,neither could control the exacerbation of soil salinization condition.Low concentration brackish water could be used for irrigation cooperated by agronomic practices.When the concentration of brackish water ≥6 g/L,it could not be utilized for the field.The research results can instruct the field irrigation in the coastal region of north Jiangsu Province.