Abstract
Taking the leaves of five Machilus species as a research object, they are Machilus oreophila, Machilus chinensis, Machilus microcarpa, Machilus lichuanensis and Machilus suaveolens. By measuring leaf surface area, cell length and width , the total dust retention, pH value of retention fluid and the content of Pb, Cr, Fe, Cu and Cd of metallic elements were measured, and compare the dust retention of five plant seedling leaves ability. The results showed that: the leaves of different kinds of Machilus have different dust abilities. Comprehensive analysis can be obtained from five kinds of Machilus dust ability in descending order of M. suaveolens > M. lichuanensis > M. chinensis > M. microcarpa > M. oreophila.
 
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 In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 4, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue.
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Highlights
There are about 100 species of Machilus in Lauraceae family in the world and more than 70 species in China, mainly distributed in southwest, south central to Taiwan, north to Shandong, Hubei and southwest Shanxi (Wu and Raven, 2000)
Leaf morphology observation The leaves of five Machilus species plants were observed by stereo microscope, and were compared from leaf shape, tip, vein and surface attachment
There was no significant difference in the leaf area between M. oreophila, M. microcarpa and M. lichuanensis, which was significantly different from that of M. chinensis
Summary
There are about 100 species of Machilus in Lauraceae family in the world and more than 70 species in China, mainly distributed in southwest, south central to Taiwan, north to Shandong, Hubei and southwest Shanxi (Wu and Raven, 2000). The whole plant can extract aromatic oil, the seed oil can be used as a lubricant, the leaves and bark can be used as a purifying agent for dyes and drinking water, and a blending agent for various incense (Guo et al, 2017) It has a strong ecological function, can effectively conserve water and soil, water conservation; plant leaves can absorb harmful substances in the air, purify the air, so as to achieve the effect of dust control and dust retention. The research on plant dust suppression has become a hot spot in China, and its ecological application potential is enormous. It is suitable for street trees and shade trees, and has good wind and sand-fixing ability.
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