大兴安岭低质林不同林型主要树种冠层分析与比较  

Analysis and Comparison of the Canopy of Main Tree Species in Different Forest Types in Daxing'an Mountain Low-Quality Forest

作　　者：崔莉[1] 董希斌[1] 宋启亮[1] 曾翔亮[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2013年第9期1-5,共5页Journal of Northeast Forestry University

基　　金："十二五"农村领域国家科技计划课题(2012BAD22B02023);林业公益性行业科研专项(201004043)

摘　　要：冠层是林木光合作用和呼吸作用等一系列生理活动的主要场所,树冠的形状、大小、位置、角度及树冠的分布都可以用于评估植物的生长状况。对大兴安岭低质林中不同林型主要树种的冠层进行分析,得到不同林型低质林的叶面积指数、林隙分数、开度、总定点因子和冠下总光合辐射通量密度等冠层结构特征参数,并研究主要冠层参数之间的相关性,建立回归方程,比较不同林型主要树种之间相关性的差异和不同树种光能利用率的大小。结果表明:大兴安岭不同林型主要树种的各主要冠层指标之间都有显著相关性,不同树种低质林中光能利用率由大到小的排序为:蒙古栎低质林、白桦低质林、山杨低质林。Forest canopy is the main place for photosynthesis, respiration and a series of physiological activities. The crown shape, size, position, angle and its distribution can be used to evaluate the growth condition. We used the plant canopy analyzer Winscanopy 2010a to analyze the canopy of main tree species in different forest types in Daxing＇ an Mountain low- quality forest, and obtain the leaf area index, gap fraction, openness, total site factor and the PPFD under canopy. We studied the correlation between the main characteristic parameters and built the regression equation. We compared the dif- ferent correlation and solar energy use efficiency between three species. There is significant correlation between the main canopy characteristic parameters, and the order of solar energy use efficiency of Daxing＇ an Mountain low-quality forest is the Xylosma racemosum, Betula platyphylla Suk. and Populus davidiana Dode.

关 键 词：低质林 冠层分析 相关性分析 光能利用率比较 

分 类 号：S718.557[农业科学—林学] S756.5