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OALib Journal期刊
ISSN: 2333-9721
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太岳山油松人工林冠下光环境特征与冠层结构
DOI: 10.3969/j.issn.1000-2006.2014.02.033, PP. 169-174
Keywords: 油松人工林,光环境,冠层结构,叶面积指数,太岳山
Abstract:
为了揭示林分冠层结构和林内光环境特征的关系,利用冠层分析仪(winscanopy)对比分析了山西省太岳山马泉林场油松人工林(幼龄林和中龄林)冠层结构及林分光环境特征。结果表明:在林分密度逐步增大情况下,林分开度呈现下降趋势,总体分布范围为9.68%～16.20%;叶面积指数随林分密度的增大相应增加,总体分布范围为2.000～3.784。林分冠上总辐射分布范围为25.37～29.10mj/(m2？d),林下总辐射为4.22～11.07mj/(m2？d)。林下总辐射随林分密度的增大而降低,表明林分对光辐射的截获能力随之增强。幼龄林消光系数为0.27,中龄林消光系数为0.59,中龄林林分消光能力大于幼龄林林分。林下直射是林下总辐射的主要组成部分。
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