大连市6种园林树种的光合固碳释氧特性  

Carbon sequestration and oxygen release capabilities of six garden tree species in Dalian

作　　者：张娜[1,2] 张巍 陈玮[1] 何兴元[1] 王雪岩[1,2] 

机构地区：[1]森林与土壤生态国家重点实验室中国科学院沈阳应用生态研究所,沈阳110016 [2]中国科学院大学,北京100049 [3]抚顺市林业局,辽宁抚顺113000

出　　处：《生态学杂志》2015年第10期2742-2748,共7页Chinese Journal of Ecology

基　　金：国家科技支撑计划项目(2012BAC05B05)资助

摘　　要：以大连市园林6种常用园林树种为研究材料,利用LI-6400便携式光合测定仪测定树木的光合生理生态指标,对6种树种的光合固碳释氧能力、光响应参数以及光合速率影响因子进行分析。结果表明:在不同季节同种植物的单位叶面积固碳释氧能力表现为夏季最强。日均单位叶面积固碳释氧能力由强到弱为龙爪槐(Sophora japonica var.pendula)>合欢(Albizia julibrissin)>光叶榉(Zelkova serrata)>槲树(Quercus dentata)>悬铃木(Platanus acerifolia)>枫杨(Pterocarya stenoptera);日均单株固碳释氧能力由强到弱为悬铃木>槲树>合欢>光叶榉>枫杨>龙爪槐。气孔导度、蒸腾速率、光合有效辐射和大气CO2浓度是影响光合速率的主要因子。悬铃木、合欢对环境的适应能力较强。根据树种的固碳释氧能力及生理特性,建议在大连地区进行绿化时优选悬铃木、合欢,槲树、龙爪槐也可作为高固碳树种推广。In this study, photosynthetic physiological indices of six garden tree species in Dalian were measured with LI-6400 photosynthesis system in different seasons. The responses of photo- synthesis to different light intensities were also calculated. The results showed that the capacity of carbon sequestration and oxygen release per unit of leaf area was the strongest in summer for all the six species. The capabilities of daily carbon sequestration and oxygen release per unit of leaf area were in order of Sophora japonica var. pendula 〉 Albizia julibrissin 〉 Zelkova serrata 〉 Quer- cus dentata 〉 Platanus acerifolia 〉 Pterocarya stenoptera; in terms of per individual plant, such capabilities were in order of P. acerifolia 〉 Q. dentate 〉 A. julibrissin 〉 Z. serrata 〉 P. stenoptera 〉 S. japonica var. pendula. Stomatal conductance, intercellular CO2 concentration, transpiration rate and light irradiance were key factors affecting the net photosynthetic rate. According to the photosynthetic light-response curve data, 19. acerifolia and A. julibrissin had better environmental adaptability. Therefore, we recommend that P. acerifolia and A. julibrissin should be as the priori- ty tree species and Q. dentate and S. japonica be used as tree species for high carbon sequestra- tion and oxygen release in Dalian.

关 键 词：园林树种 光合作用 光合生理参数 

分 类 号：S688[农业科学—观赏园艺]