Deposition of Particulate Matter of Different Size Fractions on Leaf Surfaces and in Epicuticular Waxes of Urban Forest Species in Summer and Fall in Beijing, China

Journal of Agriculture, Biotechnology & Ecology, 8(1), 81-97, 2015
ISSN: 2006-3938

Deposition of Particulate Matter of Different Size
Fractions on Leaf Surfaces and in Epicuticular Waxes of
Urban Forest Species in Summer and Fall in Beijing, China

Thi Thanh Thao Nguyen1,2, Xin Xiao Yu1∗, Hong Xia Zhang1
1College of Soil and Water Conservation, Beijing Forestry University, Beijing
100083, China. Email: nguyenthanhthao777@gmail.com
2Science and Technology Department, Binh Duong Province, Vietnam
∗ Corresponding author: yuxinxiao333@126.com; Tel: +8601062338846

ABSTRACT

This study compared eight species of urban forest trees and one grass species that are commonly cultivated in Olympic park of Beijing city to capture fine, coarse and larger particles from the air during fall and summer. Separate gravimetric analyses were performed to quantify particulate matter (PM) deposited on surfaces and trapped in epicuticular waxes. Significant differences were found between the tree species tested. In Fall, the PM content of all 3 particle sizes on the leaf surface and in epicuticular wax was much higher than in summer. The distribution of different particle size fractions differed among species and between leaf surfaces and epicuticular waxes. Needleleaves showed better absorption of PM (all 3 sizes of dust) than broadleaves, shrubs and grass clusters, except for S. japonica with small hairy leaves. The deposition of PM on leaf surfaces and waxed layers was a function of leaf shape, roughness of leaf surfaces, deposition time, rainfall, wind and urban forest system model.

Keywords: Urban forest, particulate matter, Beijing, China, epicuticular wax.




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