北京林业大学学报2017，Vol.39Issue(6)：70-77,8.DOI:10.13332/j.1000-1522.20170012
6种植物叶片的滞尘能力与其叶面结构的关系
Particle-retaining characteristics of six tree species and their relations with micro-configurations of leaf epidermis
摘要
Abstract
To help reduce the particulate pollution, we measured the amounts of dust retention of six common tree species in Beijing Forestry University, and studied the characteristics of particles on leaf surface. We also studied the relationship between dust retention ability and micro-structure of leaf surface. In this way, it is helpful for the selection of tree species for reducing particulate pollution and optimization of urban greening and beautification. Quantitative determination characteristics of particles retained by foliage of six common greening tree species in Beijing was measured by Mastersizer 2000 laser particle size analyzer. And the results showed that particulate retention capability of foliage was in the order of Pinus tabuliformis>Lonicera maackii>Buxus megistophylla>Syringa reticulate>Fraxinus pennsylvanica>Acer truncatum;However, the particulates retained by Pinus tabuliformis was 44 times of Acer truncatum. It was showed that the size of foliar particulates mainly concentrated in 10 -50 μm. And the order of average particle size ( D50 ) retention ability of plant species was as follows: Acer truncatum <Syringa reticulata < Buxus megistophylla < Fraxinus pennsylvanica < Lonicera maackii < Pinus tabuliformis. Besides, the order of specific surface area of six tree species was Acer truncatum>Syringa reticulate>Buxus megistophylla>Fraxinus pennsylvanica >Pinus tabuliformis >Lonicera maackii. The relationshipbetween dust retention and leaf surface structure was examined using scanning electron microscope ( SEM) by analyzing surface micro-configurations of leaves, and the structure and density of leaf stomata. Results showed that the particle-retaining capacity increased with the increase of stomatal size;however, no relationship was observed between the number of stomatal and the opening of stomatal. The effects of micro-configurations of leaf epidermis on the particle-retaining capacities were showed in the order of secretion>trench>groove>wrinkle>strip raise. It is concluded that the dust retention ability of tree species in residential areas should be taken into consideration for selecting tree species in order to minimize particulate matter pollution and optimize the ecological service of residential areas.关键词
北京社区/植物叶片/颗粒物/粒径分布/叶表微观结构Key words
community of Beijing/foliage/particulate matter/size distribution/micro-configurations of leaf epidermis分类
农业科技引用本文复制引用
张桐,洪秀玲,孙立炜,刘玉军..6种植物叶片的滞尘能力与其叶面结构的关系[J].北京林业大学学报,2017,39(6):70-77,8.基金项目
林业公益性行业科研专项(201304301). （201304301）
