论文部分内容阅读
黑龙江省丘陵山区面积多达3.5亿亩,占土地总面积的50％。在农耕地中,坡耕地面积达4900万亩,这些坡耕地水土流失严重,分布范围广,对农业生产影响很大。据统计,全省坡耕地水土流失面积超过10万亩的有58个市县,其中坡耕地面积100万亩以上的有克山、拜泉、海伦、望奎、巴彦、龙江、讷河、宾县、五常九县。全省多年调查分析,平均每年每亩坡耕地因水土流失危害,少收粮食50—80斤。如果按3000万亩流失严重坡耕地每亩少收80斤、1900万亩一般流失坡耕地每亩少收50斤算,每年
Heilongjiang Province hilly mountain area up to 350 million mu, accounting for 50% of the total land area. In the arable land, the sloping arable land covers an area of 49 million mu. These slopes have serious soil erosion and a wide range of distribution and have a great impact on agricultural production. According to statistics, there are 58 cities and counties with more than 100000 mu of soil and water loss in sloping fields in the province, among which, there are 58 counties with sloping farmland of more than 1 million mu, including Kick Hill, Baiquan, Helen, Wangkui, Bayan, Longjiang, Bin County, Wuchang nine counties. Years of investigation and analysis of the province, the average annual per acre sloping arable land due to soil erosion, less food 50-80 pounds. If 3000 acres of serious loss of slope farmland per acre received less than 80 pounds, 19 million mu of slope loss of arable land per acre less than 50 kg, count each year