【摘要】 祁连山水源涵养林生态系统定位研究开始于１９７３年，经过２３年的努力，已建成了我国西北干旱区温带高山寒温性针叶林生态定位研究站，并与全国联网。“八·五”期间主要开展了植物区系划分、森林植物群落结构、功能与动态、生物生产量、能量平衡、养分循环、水分循环等项目的研究，结果表明：祁连山植物区系分为东段小区和西段小区；水源林总生物量为４１８７７万ｔ；乔木层年净生产量为３６７ｔ．ｈｍ－２．ａ－１，地被物层为０１５ｔ．ｈｍ－２．ａ－１；青海云杉林冠层辐射平衡日总量为１１０２８ｋｗ．ｍ－２ｄ－１；高寒山区多年冻土与季节冻土的存在是影响冻土水文过程的重要因素，致使寺大隆河流域径流系数为０７３；森林土壤持水量灌木林最高为３９１９３ｍｍ，青海云杉林和祁连圆柏林分别为３２３７１ｍｍ和２９８３２ｍｍ，牧坡草地最少为１８００９ｍｍ；森林土壤碳（０～１００ｃｍ）总贮量为１０４４５３１万ｔ；祁连山林区年降水量４３３６ｍｍ，雨季（５～９月）占８９２％，相对湿度为６０％，属半干旱森林草原气候。更多还原

【Abstract】 Positioned research on ecosystern of water conservation forest in Qilian Mountains has initiated in 1973. Through 23 years study works, the first station focusing on the ecosystem of cold temperate coniferous forest has estabilished in mountains of the Northwestern China,and liaised with the National Ecosystem Positioned Net. The study results show that,at Present, the eco-environment in Qilian Mountains is being worsened,the quality of standing forest is being come down,the glalier is being shrunk back and the runoff is being reduced .we hope that relevant departments of government should attach great importance to the water conservation forest in Qilian mountains .更多还原