东莞市人居生态林透光率及遮荫效应  

Light Transmittance and Shading Effect of the Urban Amenity Forest in Dongguan,China

作　　者：叶永昌 敬小丽[2] 刘颂颂 莫罗坚 张璐[2] 苏志尧[2] 

机构地区：[1]东莞市林业科学研究所,广东东莞523106 [2]华南农业大学林学院,广东广州510642

出　　处：《北方园艺》2015年第5期89-92,共4页Northern Horticulture

基　　金：东莞市科技计划资助项目(2007108101029);广东省林业科技创新专项资助项目(2011KJCX031-02)

摘　　要：城市绿地尤其是其中的木本植物群落在调节气温、优化居民的生活环境方面发挥着关键作用。以东莞城市绿地4种人居生态林为研究对象,采用半球面影像技术获取数据,分析和评价林木的透光率及遮荫效应。结果表明:在调查的4种人居生态林中,共有乔木19科33属37种,以人民公园的物种最丰富,遮荫效果最好;除林下直射光外,林冠开度、林下散射光和总辐射透光率在4种人居生态林间存在显著差异(P<0.01),且林下直射光和散射光透光率与林冠开度均呈显著线性相关关系(P<0.01),说明良好的冠层结构能减少透光率,增强辐射消减效应。4个地点的人居生态林冠层均有较良好遮荫效果。Urban green land especially woody plants within it played an important role in regulating air temperature and improving living conditions. Taking four kinds of amenity forest in Dongguan as research object,the light transmittance and shading effect using hemispherical photography were analyzed and estimated. The results showed that there were 19 families, 33 genera and 37 species of trees Jn total in the four study sites,Renmin park had the most abundance species and its shading effect was the best ;canopy openness （CO）,the transmittance of transmitted diffused light and total light had a significance difference in the four urban green lands （P〈0. 01） except transmitted direct light, besides, the transmittance of transmitted light had a significance linear correlation with CO （P〈0. 01） which indicated that good canopy structure could reduce transmittance and enhance radiation attenuation effect. The four amenity forests had a good shading effect.

关 键 词：生态林 半球面影像 林冠开度 遮荫效应 

分 类 号：S718.5[农业科学—林学]