旱改水种稻治涝防止土壤次生盐渍化的措施

针对松嫩平原低平易涝地区有潜在盐渍化威胁，1996—2000年通过定点、定位观测，查明不同灌溉技术等条件下的土壤盐分含量及运动规律，其中只灌不排水的土壤盐分高于单灌单排水的含盐量。只灌不排水的土壤平均含盐量为0.1086%、单灌单排水的土壤平均含盐量为0.1004%。提出土壤次生盐渍化程度和土壤盐渍化发展趋势测报，为防止土壤次生盐渍化提供依据，同时提出相应的防治措施。

The Prevention Measure of Soil Secondary Salinization for Paddy Rice Replacing Dry Rice

The study is about the threaten of soil salt in Song Nen plain. We prognosticate through fixed-point and fixed-position from 1996 to 2000. And the soil salt of only irrigation and not drainage is above irrigation and drainage. The average soil salt of only irrigation and not drainage is 0.1086%, the average soil salt of irrigation and drainage is 0.1004%. In the finally we find out soil -salt contain and exercise regulation, the report is brought up about the degree of soil salt and its developing trend, at the same time the way of preventing soil secondary salinization is brought up.