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[1]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.

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Study on Four Kinds of Greening Tree Retention PM_2.5 and Leaf Surface Morphology During Summer in Beijing, China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 06 Page number: 52-58 Column: Public date: 2016-12-28

Title:: Study on Four Kinds of Greening Tree Retention PM_2.5 and Leaf Surface Morphology During Summer in Beijing, China

Author(s):: ZHAO Yunge¹, LU Xiaoying², LIU Bin¹, LU Shaowei³, CHEN Bo³, LI Shaoning³; 1. College of Forestry, Agricultural University of Hebei, Baoding, Heibei 071000, China;
2. Daxing District Nanhaizi Country Park Management Office of Beijing City, Beijing 110000, China;
3. Forestry and Pomology Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing Collaborative Innovation Center for Eco-environmental Improvement With Forestry and Fruit trees, Beijing 100093, China

Keywords:: PM_2.5; leaf surface morphology; Aerosol generator; atomic force microscopy; greening tree

CLC:: X173

DOI:: -

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 PM_2.5 adsorption, and atomic force microscopy (AFM) was used to observe leaf surface morphology, and analyze the leaf surface roughness parameters, interpret the PM_2.5 adsorbing mechanism of green plant. The results showed that the sequence of PM_2.5 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 PM_2.5 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]; PM_2.5 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 PM_2.5 adsorption capacity enhanced with the increase of roughness of leaf surface. Tendency of PM_2.5 adsorption capacity consistently changed with leaves roughness, and the leaves roughness was significantly related to PM_2.5 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 PM_2.5 and other particles should be planted, such as Pinus tabulaeformis and Pinus bungeana.

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