金沙江干热河谷植被恢复研究

Studies on revegetation in the dry-hot valley of Jinsha river

金沙江干热河谷是我国典型的生态脆弱区,该区气候炎热干旱,植被退化严重,水土流失强烈,一直是长江上游植被恢复的重点和难点。通过十余年来在金沙江干热河谷典型区———元谋干热河谷的研究,发现岩土性质是决定干热河谷坡地水分条件与植被类型的重要因子,降水入渗能力低加剧了干热河谷的土壤干旱,据此提出不同岩土类型区的植被恢复模式和微水造林技术,并在实践中获得了成功,为干热河谷的植被恢复研究作出了有益探索。

The dry-hot valley of Jinsha River is one of the typical eco-fragile areas in Southwest China, as well as a focus of revegetation study in the upper and middle reaches of the Yangtze River, with its extremely dry and hot climate, severely degraded vegetations and the intensive water and soil losses. By over ten years' research conducted in the typical area, the Yuanmou dry-hot valley, the researchers from Institute of Mountain Hazards and Environment, Chinese Academy of Sciences(IMDE), found that the lithologic property was one of the crucial factors determining soil moisture conditions and vegetation types in the dry-hot valley, and the low rainfall infiltration capability was one of the major reasons leading to soil drought. Then the revegetation patterns for different slopes under various lithology, as well as an forestation technique termed as Micro-water Harvesting Technique was put forward, and proved to be successful in practice.