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- Title
5个园林树种滞尘能力与叶表形态及颗粒物粒径的关系.
- Authors
李海梅; 党 宁; 禹靓倩; 张涵丹; 陈光才
- Abstract
[Objective] To study the relationship between leaf dust retention capacity and leaf surface structure and particle characteristics of landscaping tree species so as provide data for screening excellent landscaping tree species and improving the dust retention effect of vegetation. [Method] Five common evergreen tree species (Loropetalum chinense var. rubrum, Osmanthus fragrans, Pittosporum tobira, Photinia × fraseri and Cinnamomum camphora) in Fuyang District of Hangzhou were studied. The samples were collected from industrial zone, traffic zone and clean zone. The dust-holding capacity of these plants was recorded by weight difference method, the leaf surface structure, particle morphological structure and elemental composition of dust were observed by SEM-EDS. The relationship between leaf surface structure, particle morphology, particle size and dust holding capacity was analyzed. [Result] The results showed that the leaf dust retention capacity of the five tree species in the industrial area followed the order of L. chinense var. rubrum (7.36 g·m−2) > O. fragrans (6.53 g·m−2) > Pittosporum tobira (6.44 g·m−2) > Photinia × fraseri (4.28 g·m−2) > C. camphora (2.59 g·m−2), and the same pattern was observed in traffic zone and clean zone. The total PM10 retention amount of these tree species reached to 11.34 g·m−2, the order of retention capacity of these tree species was L. chinense var. rubrum, Pittosporum tobira, Photinia × fraseri, O. fragrans and C. camphora. The air quality in these zones showed obvious effect on the leaf retention capacity, followed the order of industrial zone > traffic zone > clean zone. The particles trapped in plant leaves consisted of regular particles and irregular mineral particles, which mainly included spherical, oval, fluffy polymer, chain polymer, irregular block and irregular sheet. [Conclusion] L. chinense var. rubrum shows the strongest dust-retention ability, while C. camphora shows the weakest retention of particulate matter. The percentage of coarse particles trapped in the leaves are higher than that of the fine particles. The particles trapped in leaves are mostly soot aggregates and minerals particles
- Subjects
HANGZHOU (China); PARTICULATE matter; AIR quality; SURFACE structure; MINERAL aggregates; PLANT capacity; DUST
- Publication
Forest Research, 2021, Vol 34, Issue 4, p84
- ISSN
1001-1498
- Publication type
Article
- DOI
10.13275/j.cnki.lykxyj.2021.04.010