Light Characteristics of Populus tomentosa Communities for Road Greening

SONG Zi-wei; GUO Xiao-ping; DAI Wei

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Light Characteristics of Populus tomentosa Communities for Road Greening

- Light Characteristics of Populus tomentosa Communities for Road Greening
- Bulletin of Soiland Water Conservation Vol. 27, Issue 4, Pages: 38-42(2008)
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 水土保持与荒漠化防治教育部重点实验室,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2008
- 稿件说明：
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SONG Zi-wei, GUO Xiao-ping, DAI Wei. Light Characteristics of Populus tomentosa Communities for Road Greening[J]. Bulletin of Soiland Water Conservation, 2008, 27(4): 38-42.
DOI：

SONG Zi-wei, GUO Xiao-ping, DAI Wei. Light Characteristics of Populus tomentosa Communities for Road Greening[J]. Bulletin of Soiland Water Conservation, 2008, 27(4): 38-42. DOI：

摘要

生态绿化是重要的公路绿化方式

群落稳定性、生物多样性是生态绿化的基本特征和目标。以北京市顺平路顺义段两侧毛白杨(Populus tomentosa)群落为研究对象

应用加拿大Regent Instrument公司生产的WinSCANOPY For Canopy Analysis冠层分析仪及软件采集照片。通过资料分析和实地踏查

分析了不同径阶毛白杨群落冠上、林下的光环境特征和冠层结构特征指标如光合光量子通量密度(PPFD)、林隙分数(Gap fraction)、叶面积指数(LAI)、平均叶倾角(MLA)等

得出林隙分数随着胸径的增加下降

平均叶倾角随胸径增加下降

叶面积指数随胸径的变化虽然有些波动

但是总体上呈现增加趋势。

Abstract

Ecological greening is an important way of highway greening.Community stability and species diversity are the two essential characteristics of highway ecological greening.By taking Populus tomentosa communities in the Shunyi section of Shunping Road (S305)

Beijing

as a research object and applying WinSCANOPY produced by Regent Instrument of Canada in taking photos

light environment over and under the canopy and community structure characteristic indexes

such as photosynthetic photon quanta flux density (PPFD)

gap fraction

leaf area index(LAI)

and mean leaf angle(MLA)

are analyzed by data analysis and field investigation.Results show that the gap fraction of Populus tomentosa communities decreases with the diameter at breast hight(DBH)increasing and MLA decreases with the DBH increasing.Although LAI fluctuates in some degree

it also presents an ascending tendency.The study provides a basic analysis and a reference for highway ecological greening to establish a stable plant species diversity and a multi-layer structure.

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