应用生态学报2017，Vol.28Issue(8)：2423-2430,8.DOI:10.13287/j.1001-9332.201708.014
人工覆盖地表对北京典型绿化树光合特性的影响
Impact of land pavement on photosynthetic characteristics of common greening trees in Beijing, China
摘要
Abstract
Land pavement has impacted urban tree growth and its ecosystem service,and it is necessary to investigate the key physiological processes of urban trees grown under land pavement.To study the impact of land pavement on photosynthetic characteristics of common greening trees in Beijing,a field experiment was designed with three treatments:the control (the non-paved),pervious pavement and impervious pavement,and the leaf net photosynthetic rates and related physiological-ecological parameters of two common greening trees (Fraxinus chinensis and Acer truncatum) in Beijing were measured in the 4th year after planting.Results showed that the photosynthesis of F.chinensis and A.truncatum showed different responses to different types of pavement,the net photosynthetic rate was significantly decreased for F.chinensis under both pervious and impervious pavements and for A.truncatum only under impervious pavement.The air relative humidity and soil volumetric water content under pervious and impervious pavements were lower than that under the control,which reduced water amount available for trees.The lower net photosynthetic rates of F.chinensis and A.trancatum under impervious pavement were mainly attributed to the decrease in leaf stomatal conductance.The PS Ⅱ effective photochemical quantum yield (Fv'/Fm') of F.chinensis was significantly lower under pervious and impervious pavements,while the PS Ⅱ actual photochemical quantum efficiency (ΦPSⅡ) and apparent electron transport rate (ETR) of A.truncatum were significantly higher under impervious pavement.关键词
透水硬化地表/不透水硬化地表/净光合速率/叶绿素荧光/城市绿化树Key words
pervious pavement/impervious pavement/net photosynthetic rate/chlorophyll fluorescence/urban tree引用本文复制引用
汪旭明,陈媛媛,王效科..人工覆盖地表对北京典型绿化树光合特性的影响[J].应用生态学报,2017,28(8):2423-2430,8.基金项目
本文由国家自然科学基金项目(41571035)资助 This work was supported by the National Natural Science Foundation of China (41571035). （41571035）
