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嫩江县地处大兴安岭向松嫩平原过渡带,地貌类型多属漫川漫岗,地形波状起伏,坡耕地多,又属大陆季风性气候,加之近年来毁林、毁草盲目开荒,造成自然植被破坏,土壤侵蚀(包括风蚀和水蚀)加重。受侵蚀最重的是暗棕壤和黑土两个土类。一、土壤侵蚀造成的危害(1)破坏农田,缩减耕地面积,影响机械田间作业。据2008年调查,全县有侵蚀沟1245条,平均每273公顷耕地就有一条,沟壑密度为185延长米/平方公里。沟壑增多,耕地总面积不断减少,每块耕地面积不断减小,因流水形成的侵蚀沟,不论是线状侵蚀还是片状侵蚀或沟头
Nenjiang County is located in Daxinganling Songnen Plain transitional zone, mostly Manchu Manchuang topography, wavy undulating terrain, sloping arable land, but also a continental monsoon climate, coupled with deforestation in recent years, blind grassland blindly wasteland, resulting in natural vegetation Damage, soil erosion (including wind erosion and water erosion) aggravate. The most eroded soil is dark brown soil and black soil. First, the harm caused by soil erosion (1) damage to farmland, reduce the area of arable land, affecting the mechanical field operations. According to the survey in 2008, there were 1245 erosion ditches in the county, with an average of every 273 hectares of cultivated land. The gully density was 185 m / km2. Gully increased, the total area of arable land continues to decline, each piece of arable land area continues to decrease, due to the formation of erosion ditch water, whether linear erosion or sheet erosion or ditch