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题名: Effects of road dust on the growth characteristics of Sophora japonica L. seedlings
作者: Bao, Le; Qu, Laiye; Ma, Keming; Lin, Lin
刊名: JOURNAL OF ENVIRONMENTAL SCIENCES
出版日期: 2016-08-01
卷号: 46, 页码:147-155
关键词: Dust composition ; Dust load ; Dust grain size ; Nitrogen ; Biomass
DOI: 10.1016/j.jes.2015.08.031
部门归属: 城市与区域生态国家重点实验室
英文摘要: Road dust is one of the most common pollutants and causes a series of negative effects on plant physiology. Dust's impacts on plants can be regarded as a combination of load, composition and grain size impacts on plants; however, there is a lack of integrated dust effect studies involving these three aspects. In our study, Sophora japonica seedlings were artificially dusted with road dust collected from the road surface of Beijing so that we could study the impacts of this dust on nitrogen/carbon allocation, biomass allocation and photosynthetic pigments from the three aspects of composition, load and grain size. The results showed that the growth characteristics of S. japonica seedlings were mostly influenced by dust composition and load. Leaf N, root-shoot ratio and chlorophyll a/b were significantly affected by dust composition and load; leaf C/N, shoot biomass, total chlorophyll and carotenoid were significantly affected by dust load; stem N and stem C/N were significantly affected by dust composition; while the dust grain size alone did not affect any of the growth characteristics. Road dust did influence the growth characteristics more extensively than loam. Therefore, a higher dust load could increase the differences between road dust and loam treatments. The elements in dust are well correlated to the shoot N, shoot C/N, and root-shoot ratio of S. japonica seedlings. This knowledge could benefit the management of urban green spaces. (C) 2016 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35575
Appears in Collections:城市与区域生态国家重点实验室_期刊论文

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