松嫩平原土壤水盐动态规律研究

对设于松嫩平原嫩江右岸引嫩江水工程区域内的土壤水盐动态观测点多年研究结果表明，基　　　　本无盐渍化的总干段土壤较通水前土壤盐分与ｐＨ值以及地下水ｐＨ值和盐分有减有增，但减多增少，说　　　　明优质、低盐分嫩江水引入后土壤向改善方向发展，而土壤盐渍化重又无排水工程的莎分干段则相反，盐　　　　渍加重重．北部引嫩江水工程是成功的，关键是必需有排水系统和排水出路．

Dynamics of Salt and Water in the Songnen Plain

Dynamics of the soil salt and water in the irrigation of right bank of Nen River in Songnen Plain had been studied for several years. The results showed that non - salinized soil made the contents of salt and pH value of soil and groundwater vary widely, however, the decrease was the preponderant trends. It indicated that the irrigation with low salt content water from Nen River make improvement of those soils. In contrast, in the Shafen Section, the salinization was heavily, and the drainage was poor. The irrigation made the salinization more serious. In general, the northern irrigation region with the water from Nen River was successful. The key influent factor was whether there were drainage system and outlet or not.