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４１８７７万ｔ；乔木层年净生产量为３６７ｔ．ｈｍ－２．ａ－１，地被物层为０１５ｔ．ｈｍ－２．ａ－１；青海云杉林冠层辐射平衡日总量为１１０２８ｋｗ．ｍ－２ｄ－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０７３；森林土壤持水量灌木林最高为３９１９３ｍｍ，青海云杉林和祁连圆柏林分别为３２３７１ｍｍ和２９８３２ｍｍ，牧坡草地最少为１８００９ｍｍ；森林土壤碳（０～１００ｃｍ）总贮量为１０４４５３１万ｔ；祁连山林区年降水量４３３６ｍｍ，雨季（５～９月）占８９２％，相对湿度为６０％，属半干旱森林草原气候。
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 .
出处
《甘肃林业科技》
1996年第4期1-12,共12页
Journal of Gansu Forestry Science and Technology
关键词
祁连山
水源林
生态系统
定位研究
Qilian mountains Water conservation forest Ecosystem positioned research.
