水土流失是全球性的公害问题。林业措施是防治水土流失的根本措施，它具有保持水土、涵养水源、防风固沙、改善农业生产条件、改善人类生存环境，生态、经济和社会效益大而且久远。黑龙江省是国家重要的商品粮基地，省委七届四次会议提出，力争用15年时间把黑龙江省由农业大省 Soil and water loss is a global issue of pollution. Forestry measures are the fundamental measures to prevent and control soil and water loss. It has the advantages of maintaining water and soil, conserving water sources, fixing wind and sand, improving agricultural production conditions and improving the living environment for human beings. Its ecological, economic and social benefits are great and long-lasting. Heilongjiang Province is the country’s important commodity grain base, proposed by the Fourth Session of the Seventh Provincial Committee, and strive to use 15 years to Heilongjiang Province by a large agricultural province