祁连山青海云杉林冠层持水能力  

Water storage capacity of Qinghai spruce (Picea crassifolia) forest canopy in Qilian Mountains

作　　者：彭焕华[1] 赵传燕[2] 许仲林[1] 彭守璋[2] 王瑶[2] 

机构地区：[1]兰州大学西部环境教育部重点实验室,兰州730000 [2]兰州大学干旱与草地生态教育部重点实验室,兰州730000

出　　处：《应用生态学报》2011年第9期2233-2239,共7页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金重点项目(91025015);国家环境保护公益性基金项目(NEPCP200809098)资助

摘　　要：基于2008年祁连山大野口关滩流域青海云杉林冠截留观测数据和青海云杉林冠各组分持水能力实验室数据,采用直接测量和回归分析方法对青海云杉林冠层持水能力进行研究.结果表明:受不同因素影响,两种方法测得的青海云杉林冠层持水能力有一定差异.回归分析法主要受林内穿透雨观测方法的影响,所得林冠层最大持水能力为0.69mm;直接测量法主要受样地内树高、胸径、植株密度、叶面积指数等影响,所得林冠层最大持水量为0.77mm.直接测量法得到的青海云杉林冠各组分单位面积最大持水量依次为树皮(0.31mm)>枝(0.28mm)>叶(0.08mm).By the methods of direct measurement and regression analysis, this paper estimated the water storage capacity of Picea crassifolia forest canopy in Guantan in Qilianshan Mountains, based on the observed throughfall and the laboratory experimental data about the water storage capacity of various canopy components in 2008. Due to the impacts of various factors, differences existed in the canopy water storage capacity estimated by the two methods. The regression analysis was mainly impacted by the measurement approaches of the throughfall, the maximum water storage capacity estimated being 0.69 mm, whereas the direct measurement was mainly impacted by tree height, diameter at breast height, plant density, and leaf area index, with the estimated maximum water storage capacity being 0.77 mm. The direct measurement showed that the maximum water storage capacity per unit area of the canopy components of the forest was in the order of barks （0.31 mm） branches （0.28 mm） leaves （0.08 mm）.

关 键 词：关滩流域 青海云杉林 林冠持水能力 林冠截留 

分 类 号：S791.18[农业科学—林木遗传育种]