松嫩平原是我国土地次生盐碱化最严重的地区之一.由于盲目开垦、过度放牧及一些水利工程带来的负效应,土地次生盐碱化迅速发展,每年增长速度达1%～1.4%.到下世纪初将有45%左右盐碱化土地退化为基本无利用价值的重盐碱地.主要防治措施有水田、芦苇开发和以灌代排的水利措施,改革草原经营机制、封原育草、秸杆利用等草场改良和畜牧业发展措施,改土培肥、种植耐盐经济作物等农业技术措施. Songnen Plain is one of the areas with the most serious secondary salinization in our country.Because of the blind reclamation, overgrazing and negative effects brought by some water conservancy projects, the secondary salinization of land is developing rapidly with an annual growth rate of 1% 1.4%. By the beginning of next century, about 45% of salinized land will be degenerated into heavy saline-alkali land with basically no utilization value. The main prevention and control measures include paddy field and reed development, irrigation measures with irrigation and drainage, reform of grassland management mechanism, Grass planting, straw utilization and other pasture improvement and livestock husbandry development measures, soil improvement and fertilization, planting salt-tolerant cash crops and other agricultural technical measures.