松嫩平原低平易涝区为黑龙江省重要粮豆产区,耕地面积121万hm~2,占松嫩平原耕地面积的29.5％。该区属于季节性冻土区,由于海拔低(110～130m)、地下水位埋深浅等特殊地理条件,土壤水分和盐分形成了独特的动态变化,春季土壤返盐现象严重、有效养分释放缓慢,严重阻碍了作物的生长,限制了农业生产水平的提高。摸清该地区耕地土壤盐分成因,采用科学措施予以 The lowland and easy flood area in the Songnen Plain is an important grain bean producing area in Heilongjiang Province. The cultivated area is 1,200,000 hm 2, accounting for 29.5% of the cultivated land in the Songnen Plain. Due to the special geographical conditions of low elevation (110-130m) and shallow groundwater table, the soil moisture and salinity form a unique dynamic change. The return of salt in spring is serious, and the release of effective nutrients is slow. Seriously hindered the growth of crops and restricted the improvement of agricultural production. To find out the causes of soil salt in cultivated land in the area and to adopt scientific measures