黑河上游青海云杉林冠层空隙度的时间变异特征  

Temporal variation of canopy openness of Qinghai spruce forest at upstream of Heihe river

作　　者：解欢欢[1] 彭守璋[1] 赵传燕[1] 乔雨[1] 葛红元 王红义 杨晓凯 

机构地区：[1]兰州大学生命科学学院,草地农业生态系统国家重点实验室,兰州730000 [2]甘肃省张掖市林业局寺大隆林场,甘肃张掖734000

出　　处：《兰州大学学报（自然科学版）》2016年第5期628-633,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(91425301)

摘　　要：以祁连山区天涝池流域的青海云杉为研究对象,使用数码相机对林冠进行拍照,获取林分结构在不同太阳位置下的数码照片,利用图像处理方法估算不同图像的空隙度.研究结果表明林下某一固定位置的空隙度随着太阳位置的变化有较大的时间变异.提供了一种将太阳位置因素考虑到空隙度测定中的方法,为生态水文模型的研究提供高精度参数.Qinghai spruce （Picea crassifolia） in the Qilian Mountains was selected as a research object. Digital photo of stand structure under the different solar position was acquired by taking photos of crown canopy using digital camera, the canopy openness under the different solar position was figured out by editing photos. The re- sult showed that the canopy openness has quite large variation with variations of sun＇s positions, in turn there has different light distribution in forest floor. We provided a new method to determinate the canopy openness, in hope to provide accurate estimation method of the parameter for ecohvdroloQical models.

关 键 词：数码照片 太阳位置 林分空隙度 青海云杉 祁连山 

分 类 号：Q142[生物学—生态学]