城市夜间灯光对香樟生长的影响  

Effects of urban nighttime light on the growth of Cinnamomum camphora

作　　者：李小婷 陈斌 王海军[3] 郑光[4] 杨丹 苗馨予 徐驰[1] LI Xiao-ting;CHEN Bin;WANG Hai-jun;ZHENG Guang;YANG Dan;MIAO Xin-yu;XU Chi(School of Life Sciences,Nanjing University,Nanjing 210023,China;College of Biology and Environment,Nanjing Forestry University,Nanjing 210037,China;Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China;School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China)

机构地区：[1]南京大学生命科学学院,南京210023 [2]南京林业大学生物与环境学院,南京210037 [3]中国科学院水生生物研究所,武汉430072 [4]南京大学地理与海洋学院,南京210023

出　　处：《应用生态学报》2019年第7期2284-2290,共7页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(31770512,31600328);江苏省自然科学基金项目(BK20160924)资助~~

摘　　要：为了解常绿乔木对城市夜间灯光的生长响应,以华东地区典型常绿行道树种香樟为对象,研究南京市一条典型道路上近灯处(路灯正下方)和远灯处(两相邻路灯中间位置)生长区位的夜间光照强度差异性对香樟生长性状的影响.结果表明:近灯处香樟的平均胸径为16.8 cm,当年生小枝总生产力为309.4 g·m^-2,当年生叶片生产力为241.5 g·m^-2,叶片相对叶绿素含量为34.6 SPAD.远灯处香樟的平均胸径为15.5 cm,当年生小枝总生产力为273.4 g·m^-2,当年生叶片生产力为212.8 g·m^-2,叶片相对叶绿素含量为33.1 SPAD.近灯处香樟的平均胸径、当年生小枝总生产力、当年生叶片生产力及叶片相对叶绿素含量均显著高于远灯处.两处树木间比叶面积没有显著差异.夜间灯光的补充照明促进了近灯处香樟的生长,并改变了树冠生长对阳光的响应特征.To understand the effects of urban artificial nighttime light on the growth of evergreen trees, we conducted a field investigation in a typical urban street planted with Cinnamomum camphora(a common evergreen street tree species in eastern China) in the Nanjing City, China. Along the street, trees from two types of growing locations with contrasting distances from the street lamp(just under the lamp vs. between two adjacent lamps) were selected. The growth-related plant functional traits were measured and compared. The results showed that trees grown under the lamp had a mean diameter at beast height(DBH) of 16.8 cm, current-year branch productivity(CBP) of 309.4 g·m^-2, current-year leaf productivity(CLP) of 241.5 g·m^-2, and leaf relative chlorophyll content(LCC) of 34.6 SPAD. Trees grown between lamps had a mean DBH of 15.5 cm, CBP of 273.4 g·m^-2, CLP of 212.8 g·m^-2, and LCC of 33.1 SPAD. DBH, CBP, CLP and LCC of the trees under the lamp were significantly higher than those between lamps. There was no significant difference in specific leaf area between trees from the two locations. Our results suggested that urban artificial nighttime light could promote the growth of C. camphora, and alter sunlight-determined characteristics of canopy growth vigor.

关 键 词：城市生态系统 人工夜间灯光 香樟 功能性状 生长率 

分 类 号：S792.23[农业科学—林木遗传育种]