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一、坡耕地水土流失 情况与危害 黑龙江省中部漫川漫岗区,为松嫩高平原,是大小兴安岭延伸的山前冲积洪积台地。总面积7万多平方公里,约占全省面积的17％。气候属于半干旱半湿润地区,年平均气温2～3℃,年降水500毫米左右,无霜期115～130天;土壤以黑土为主,是我省主要的产粮基地。
I. Soil and Water Loss and Damage on Sloping Cultivated Land Manchu Manchu District, central Heilongjiang Province, is the Songnen Plains. It is a piedmont alluvial platform that stretches across the Great Xinguang Mountains. The total area of more than 70,000 square kilometers, accounting for 17% of the province’s area. The climate belongs to the semi-arid and semi-humid area, the annual average temperature is 2-3 ℃, the annual precipitation is about 500 mm and the frost-free period is 115-130 days. The soil is dominated by black soil, which is the main grain-producing base in our province.