敖汉旗水土流失面积6415km2,年均土壤侵蚀模数5000~8000t/km2,个别地方高达1.50万t/km2。至2004年底,全旗水土保持综合治理措施保存面积达3300km2,治理程度达51.4%,林草保存面积4249.5km2,森林覆盖率由治理前的10.5%提高到44%,生态环境和农牧业生产条件得到了极大改善;年粮食总产量稳定在5亿kg左右,比20世纪70年代年均总产量翻了两番,90%的农牧民实现了稳定脱贫;重点治理小流域年土壤侵蚀量减少80%,蓄水量提高85%,保水率提高到85.4%。介绍了水土保持生态环境建设的发展历程、取得的成效和具体的做法与经验。 Aohan Banner soil erosion area of ​​6415km2, average annual soil erosion modulus of 5000 ~ 8000t / km2, in some places as high as 15000 t / km2. By the end of 2004, the comprehensive conservation measures for water and soil conservation in the whole province reached 3300km2, with a degree of governance of 51.4% and preserved forest and grass area of ​​4249.5km2. The forest coverage rate increased from 10.5% before treatment to 44%. The ecological environment and agriculture and animal husbandry production The conditions have been greatly improved; the annual grain output has stabilized at about 500 million kg, more than quadrupled the annual average output in the 1970s, and 90% of farmers and herdsmen have achieved stable poverty alleviation; and the annual control of soil erosion 80% reduction in volume, water storage capacity increased by 85%, water retention increased to 85.4%. The course of development of soil and water conservation and ecological environment construction, the achievements made and the specific practices and experiences are introduced.