不同绿地类型下城市绿化树种BVOCs排放特征
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国家自然科学资助项目“不同生境下城市绿化树种VOCs排放影响机制及估算模型研究”(31370700)


Emission Characteristics of BVOCs from Urban Greening Tree Species in Different Greenbelt
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    摘要:

    [目的] 探讨天津市绿化树种在不同绿地生境条件下植物源挥发性有机物(BVOCs)的排放特征,为城市园林绿地树种的筛选提供依据。[方法] 采用动态顶空套袋法和热脱附-气相色谱/质谱联用技术,分析了不同绿地类型下对桧柏(Juniperus chinensis)、绦柳(Salix matsudana)、西府海棠(Malus micromalus)和国槐(Sophora japonica)4种城市常见绿化树种BVOCs排放特征。[结果] (1)不同生境条件下桧柏、绦柳、西府海棠和国槐释放BVOCs数量和成分均不同。4种树种在滨水绿地、道路绿地、公园绿地和校园绿地4种不同绿地类型下分别共鉴定出69种、84种、20种和36种挥发性有机物。4种绿地类型下4种树木释放烯烃类物质的相对含量显著高于其他类型物质,且其相对含量均按道路绿地>校园绿地>公园绿地>滨水绿地的顺序依次递减,而酯类和烷烃类物质恰与其相反,二者相对含量均在滨水绿地类型下显著较高。(2)绦柳释放的醇类和酮类物质与4种绿地类型下的光照强度,桧柏释放的烯烃类、烷烃类、醇类、酯类和酮类物质、西府海棠释放的烷烃类和酯类物质、国槐释放的烯烃类和酯类物质与4种绿地类型下的相对湿度,桧柏和绦柳释放的醇类和酮类物质、国槐释放的烯烃类物质与4种绿地类型下的温度分别呈显著相关。[结论] 绿地生境条件的差异影响绿化树种排放BVOCs的成分和含量,且仅有部分类型挥发物与环境因子呈显著性相关。

    Abstract:

    [Objective] To explore the emission characteristics of biogenic volatile organic compounds(BVOCs) from greening tree species in different greenbelts in Tianjin City, and to provide the basis for selecting of the green tree species in urban gardens.[Methods] Four urban greening tree species like Juniperus chinensis, Salix matsudana, Malus micromalus and Sophora japonica were sampled for collecting and measuring BVOCs by dynamic bagging headspace and the thermal desorption-gas chromatography/mass spectrometry(TDS-GC/MS) technology.[Results] (1) Totally 69, 84, 20 and 36 types of BVOCs were detected respectively from J. chinensis, S. matsudana, M. micromalus and S. japonica. But the quantity and composition of the BVOCs released by the four urban greening trees varied in different habitats. For all the species, relative contents of olefin compounds were significantly higher than the corresponding values of other types of components. Relative contents of olefin in the four greenbelts had a rank as:road greenbelt > campus greenbelt > park greenbelt > waterfront greenbelt. On the contrary, for the contents of ester and alkane volatiles, their relatives content were obviously higher in waterfront greenbelt than the ones in other greenbelts. (2) The contents of alcohols and ketones released by S. matsudana were significantly correlated with light intensity. Relative humidity was significantly correlated with the relative contents of olefins, alkanes, alcohols, esters and ketones released by J. chinensis, the contents of alkanes and esters released by M. micromalus, the contents of olefins and esters released by S. japonica; whereas, temperature was significantly correlated with the contents of alcohols and ketones released by both J. chinensis and S. matsudana, the content of olefins released by S. japonica.[Conclusion] Greenbelt habitat condition can influence the composition and content of BVOCs released by greening tree species, but only some types of volatiles were significantly correlated with some enviromental factors.

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张倩,李洪远,吕铃钥,杨佳楠.不同绿地类型下城市绿化树种BVOCs排放特征[J].水土保持通报,2017,37(3):22-27,34

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  • 收稿日期:2016-07-18
  • 最后修改日期:2016-11-04
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  • 在线发布日期: 2017-07-11
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