| 摘要: |
| 以深山含笑Michelia maudiae、乐昌含笑Michelia chapensis、广玉兰Magnolia grandiflora 及玉兰Magnolia denudata 4 种园林绿化中常用的木兰科景观乔木树种为研究对象，采用动态顶空气体循环采集法和TDU － GC － MS（thermo desorption unit- gas chromatography- mass spectrum）联用技术，对这4种植物枝叶释放的VOCs（volatile organic compounds）成分进行测定分析，并评价其对环境的保健作用。结果表明，4 个树种枝叶释放的VOCs 均以萜烯类化合物为主要成分。其中深山含笑、乐昌含笑、广玉兰释放的萜烯类化合物的相对含量分别为75.70%、66.44%、60.81%，为各自释放有毒有害污染物相对含量的13.02 倍、8.38 倍、9.04 倍，均具有净化空气、抗炎解毒、调节人体神经系统的作用，深山含笑及乐昌含笑释放的萜烯类化合物成分还有益于心血管系统功能，故3 个树种均为优良的营建保健型生态景观园林树种。玉兰释放的萜烯类化合物的相对含量为32.25%，仅为其释放有毒有害污染物相对含量的2.48倍，虽然也具有一定的保健作用，但对区域大气质量存在潜在影响，不建议在人口密集活动区域作为绿化树种配置。 |
| 关键词: 深山含笑 乐昌含笑 广玉兰 玉兰 挥发性有机物 有毒有害污染物 |
| DOI： |
| 分类号: |
| 基金项目:浙江省省院合作林业科技项目(2020SY10) |
|
| Volatile Organic Compounds Inventory and Healthcare Evaluation of Four Landscape Trees in Magnoliaceae |
|
wang jinfeng, zhou qi, chen zhuomei
|
|
Zhejiang Academy of Forestry
|
| Abstract: |
| Michelia maudiae, M. chapensis, M. grandiflora and M. denudata are Magnoliaceae trees which are frequently used in landscape . To evaluate the healthcare effect of these four trees, the volatile organic compounds (VOCs) in branches and leaves of which were analyzed by using the dynamic headspace aircirculation method and TDU － GC － MS technique. The results show that the relative contents of terpenes are the highest among VOCs from branches and leaves of the 4 trees. The relative contents of terpenes emitted by M. maudiae, M. chapensis and M. grandiflora are 75.70%, 66.44% and 60.81% respectively, which are as much as 13.02, 8.38 and 9.04 times of the relative contents of HAPs emitted by the corresponding trees. The terpenes emitted by all the three trees have the ability of cleaning air, killing insects, resisting microorganism, and improving the nervous system of humans. Besides, some terpenes emitted by M. maudiae and M. chapensis are beneficial to blood circulation. So all the three trees can be used as healthcare garden landscape tree species.But the relative contents of terpenes emitted by branches and leaves of M. denudata are 32.25%, which are only 2.48 times of the relative contents of HAPs. Though the VOCs of M. denudata are more of less beneficial to the environment and humans, the species is not suggested to be applied in the places with frequent population activity in consideration of its potential risk of polluting the air. This study provides the basic data for enriching the VOCs database, as well as for evaluating the environment effects of Magnoliaceae species. |
| Key words: M. maudiae M. chapensis M. grandiflora M. denudata volatile organic compounds hazardous air pollutants |
