ZHAO Yunge,LU Xiaoying,LIU Bin,et al.Study on Four Kinds of Greening Tree Retention PM2.5 and Leaf Surface Morphology During Summer in Beijing, China[J].Research of Soil and Water Conservation,2016,23(06):52-58.
夏季绿化树种滞留PM2.5与叶片微形态特征研究
- Title:
- Study on Four Kinds of Greening Tree Retention PM2.5 and Leaf Surface Morphology During Summer in Beijing, China
- 关键词:
- PM2.5; 叶表面微形态; 原子力显微镜(AFM); 气溶胶再发生器; 绿化树种
- 分类号:
- X173
- 摘要:
- 研究于夏季在北京大兴选取6个绿化树种（油松、白皮松、柳树、五角枫、银杏、杨树）为对象，应用气溶胶再发生器对林木叶片PM2.5吸附量进行定量分析，并应用原子力显微镜（AFM）观察叶表面微形态特征，测定叶表面粗糙度等参数，阐释植物叶片吸附PM2.5机制。结果表明：单位叶面积PM2.5吸附量排序为：油松[（0.057±0.004）μg/cm2]>白皮松[（0.052±0.001）μg/cm2]>柳树[（0.041±0.003）μg/cm2]>五角枫[（0.036±0.007）μg/cm2]>杨树[（0.021±0.002）μg/cm2]>银杏[（0.018±0.003）μg/cm2]；从月份变化来看，单位叶面积PM2.5吸附量表现为9月[（0.040±0.017）μg/cm2]> 7月[（0.039±0.015）μg/cm2]> 8月[（0.034±0.016）μg/cm2]；针叶树种单位叶面积PM2.5吸附量高于阔叶树种。植物叶表面存在褶皱、沟槽，粗糙度相对较高的树种，吸附PM2.5能力较强；叶表面相对光滑，突起部位轮廓较平缓，粗糙度小的树种，其吸附PM2.5能力也相对较弱；6个树种粗糙度大小与其吸附PM2.5能力大小顺序完全一致，呈显著正相关（R2=0.957）。因此，为提高城市植被的环境效应，可选择叶表面形态有利于吸滞PM2.5等颗粒物的油松、白皮松等针叶树种。
- Abstract:
- Six kinds of greening tree species (Pinus tabulaeformis, Pinus bungeana, Salix babylonica, Acer mono Maxim, Ginkgo biloba, Populus L.) in Daxing District of Beijing were studied, aerosol generator was applied to quantitatively study leaves PM2.5 adsorption, and atomic force microscopy (AFM) was used to observe leaf surface morphology, and analyze the leaf surface roughness parameters, interpret the PM2.5 adsorbing mechanism of green plant. The results showed that the sequence of PM2.5 adsorption capacity per unit leaf area was Pinus tabulaeformis[(0.057±0.004)μg/cm2] > Pinus bungeana[(0.052±0.001)μg/cm2] > Salix babylonica[(0.041±0.003)μg/cm2] > Acer mono Maxim[(0.036±0.007)μg/cm2] > Populus L.[(0.021±0.002)μg/cm2] > Ginkgo biloba[(0.018±0.003)μg/cm2], and the sequence of PM2.5 adsorption capacity per unit leaf area in different months was September[(0.040±0.017)μg/cm2] > July[(0.039±0.015)μg/cm2] > August[(0.034±0.016)μg/cm2]; PM2.5 adsorption of coniferous species was higher than that of broad-leaf species. Fluted or grooved leaves had greater roughness than those with smooth leaf surface, and PM2.5 adsorption capacity enhanced with the increase of roughness of leaf surface. Tendency of PM2.5 adsorption capacity consistently changed with leaves roughness, and the leaves roughness was significantly related to PM2.5 adsorption capacity (R2=0.957). In order to improve the environmental effect of urban vegetation, the tree species whose leaf surface morphology is conducive to adsorb PM2.5 and other particles should be planted, such as Pinus tabulaeformis and Pinus bungeana.
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备注/Memo
收稿日期:2016-04-19;改回日期:2016-05-03。
基金项目:国家林业局林业公益性行业科研专项（20130430101）；北京市农林科学院科技创新能力建设专项“北京燕山森林生态国家站基础数据平台建设”；科技创新服务能力建设—协同创新中心—林果业生态环境功能提升协同创新中心（2011协同创新中心）（市级）（PXM2016_014207_000038）
作者简介:赵云阁(1990-)女,河北阳原人,在读硕士,主要研究方向:森林经理学。E-mail:675420514@qq.com
通讯作者:李少宁(1975-),男,河北滦县人,博士,副研究员,主要从事城市森林生态功能研究。E-mail:lishaoning@126.com