9种园林树木固碳释氧生态功能评价  

Ecological Function Evaluation on Nine Kinds of Landscape Trees on Carbon Sequestration and Oxygen Release

作　　者：林萌[1] 郭太君[1] 代新竹 

机构地区：[1]吉林农业大学,长春130118 [2]长春市动植物公园

出　　处：《东北林业大学学报》2013年第6期29-32,共4页Journal of Northeast Forestry University

基　　金：吉林省科技发展计划项目(20095038)

摘　　要：通过对9种园林树木树冠表层,以及外1/3层(距树冠外表层)、中1/3层和内1/3层中间部位的光照强度、叶片光合速率和叶面积变化规律的研究,分析不同树种及其树冠不同部位光照强度、单位叶面积固碳释氧量和叶面积的变化,以期探讨园林树木固碳释氧生态功能的评价方法。结果表明:光照强度、单位叶面积固碳释氧量均由树冠表层向树冠中心顺次降低,其平均值接近外1/3层或外1/3层和中1/3层之间;叶面积以外1/3层最大,占51.47%,其次是中1/3层占29.88%;用树冠表层、外1/3层、中1/3层和内1/3层单位叶面积固碳释氧量计算全株的固碳释氧量,分别是全株的1.53～2.37、1.04～1.32、0.6～0.96和0.25～0.53倍。因此,在评价园林树木固碳释氧生态功能时,用外1/3层中点与中1/3层中点之间偏于外1/3层中点处的叶片更为合理和方便。An investigation was conducted to study the light intensity, leaf photosynthetic rate and leaf area variation of garden trees canopy surface （A）, the outer layer of 1/3 （B）, middle layer of 1/3 （C） and inner layer of 1/3 （D）. We analyzed the variation of the light intensity in different parts, the unit area of leaf carbon fixation, oxygen release and leaf area in different kinds of trees to explore the evaluation method for the landscape trees ecological function of carbon fixation and oxygen release. The results show that the light intensity, the carbon fixation and oxygen release of the unit leaf area decrease from layer A to the center of tree top. The average is close to the value in the layer B or between the layer B and layer C. Leaf area of layer B is the biggest accounting for 51.47%, followed by layer C accounting for 29.88%. We calculated the amount of whole plant carbon fixation and oxygen release with unit leaf area of carbon fixation and oxygen release of layers A, B, C and D, accounting for 1.53-2.37, 1.04-1.32, 0.6-0.96 and 0.25-0.53 times of the whole plant. Therefore, it is more reasonable and convenient that the midpoint between the layers B and C, but close to the layer B, is used to evaluate the landscape tree ecological function of carbon fixation and oxygen release.

关 键 词：园林树木 固碳释氧 生态功能 

分 类 号：S718.4[农业科学—林学]