生态环境学报 ›› 2023, Vol. 32 ›› Issue (2): 245-255.DOI: 10.16258/j.cnki.1674-5906.2023.02.004

• 研究论文 • 上一篇    下一篇

北京九龙山不同林型林间大气主要BVOCs组成研究

徐晨(), 裴顺祥, 吴莎, 郭慧, 马淑敏, 吴迪, 章尧想, 法蕾*()   

  1. 中国林业科学研究院华北林业实验中心/北京九龙山暖温带森林国家长期科研基地,北京 102300
  • 收稿日期:2022-11-25 出版日期:2023-02-18 发布日期:2023-05-11
  • 通讯作者: *法蕾(1977年生),女,高级工程师,博士,主要研究方向为森林生态系统功能。E-mail: titafall@126.com
  • 作者简介:徐晨(1996年生),女,硕士研究生,主要研究方向为森林康养。E-mail: fl050802@caf.ac.cn
  • 基金资助:
    中国林业科学研究院基本科研业务费专项资助(CAFYBB2019ZC006)

Study on Major Atmospheric BVOCs Composition of Different Forest Types in Jiulong Mountain, Beijing

XU Chen(), PEI Shunxiang, WU Sha, GUO Hui, MA Shumin, WU Di, ZHANG Yaoxiang, FA Lei*()   

  1. Experimental Center of Forestry in North China, Chinese Academy of Forestry/Beijing Jiulong Mountain National Long-term Scientific Research Base of Warm Temperate Forests, Beijing 102300
  • Received:2022-11-25 Online:2023-02-18 Published:2023-05-11
  • Supported by:
    Fundamental Research Funds of CAF

摘要:

为明晰北京市周边不同类型森林的康养效果,对北京市九龙山不同林型内大气中的BVOCs组成及比例动态进行了研究。采用Tenax吸附管和采样泵在北京九龙山3个不同林型内进行林间大气采样,利用热脱附-气相色谱-飞行质谱仪对采集样品进行定性和定量分析,研究了包括异戊二烯、单萜、倍半萜烯在内的多种大气植物源挥发性有机化合物的变化规律及气象因素对其变化的影响。结果表明:九龙山不同森林类型林间大气的BVOCs总量浓度排序为针阔混交林>针叶林>阔叶林,混交林内BVOCs浓度相对较高,但差异性不显著。林间大气BVOCs中α-蒎烯(α-pinene)和异戊二烯(isoprene)比例较高,α-蒎烯(α-pinene)占到总量的34.75%-47.24%,异戊二烯(isoprene)占到总量的15.35%-24.93%,针叶林大气中的异戊二烯浓度较高,大于阔叶林和混交林,单萜浓度则表现为混交林>针叶林>阔叶林,倍半萜烯浓度较低,占总量的15.35%-24.93%,表现为阔叶林>混交林>针叶林,差异性不显著。同一采样时间,北京九龙山不同林型林间大气BVOCs总量差异不显著,但各样地随时间递减趋势明显,异戊二烯呈现显著的随时间下降趋势。各林型大气BVOCs受环境因素影响较大,主要是温、湿度。异戊二烯浓度与环境温度呈显著正相关。温度是影响九龙山不同林型大气主要BVOCs的关键因素。九龙山森林内大气BVOCs在8月份的浓度较高,8月进行森林康养的效果最好。

关键词: 九龙山, 植物源挥发性有机化合物, 针叶林, 针阔混交林, 阔叶林

Abstract:

In order to explore the health effects of different forests around Beijing, the composition and proportion dynamics of BVOCs in an environment of different forest types in Jiulong Mountain, Beijing were studied. We used Tenax adsorption tube and sampling pump to conduct air sampling in three different forest types in Jiulong Mountain, Beijing. Thermal desorption-gas chromatography-flight mass spectrometer was used to analyze the collected samples qualitatively and quantitatively. The variation of atmospheric volatile organic compounds (VOCS) derived from plants, including isoprene, monoterpenes and sesquiterpenes, and the influence of meteorological factors on their variation were studied. The results showed that the total concentration of BVOCs in different forest types in Jiulong Mountain was in the order of coniferous and broadleaved mixed forest > coniferous forest > broadleaved forest, and the concentration of BVOCs in mixed forest was the highest, and there was no significant difference among forest types. The proportion of α-pinene (α-pinene) and isoprene (isoprene) was high in atmospheric BVOCs, with α-pinene (α-pinene) accounting for 34.75%-47.24% and isoprene (isoprene) accounting for 15.35%-24.93% of total BVOCs. The concentration of isoprene in the atmosphere of coniferous forest was higher than that of broadleaved forest and mixed forest, the concentration of monoterpene was mixed forest>coniferous forest>broadleaved forest, and the concentration of sesquiterpene was lower, accounting for 15.35%-24.93% of the total, and the concentration of sesquiterpene was broadleaved forest>mixed forest>coniferous forest. There was no significant difference among the forest types. There was no significant difference in the total amount of atmospheric BVOCs among different forest types at the same sampling time, in Jiulong Mountain, Beijing. But there was a significant decreasing trend over time in different forest types, and isoprene showed a significant decreasing trend over time. The atmospheric BVOCs of various forest types were greatly affected by environmental factors, mainly temperature and humidity. Isoprene concentration was significantly and positively correlated with ambient temperature. Temperature was the key factor affecting the main BVOCs in the area of different forest types in Jiulong Mountain. The concentration of atmospheric BVOCs in Jiulong Mountain forest is high in August, which is the best time for forest rehabilitation.

Key words: Jiulong Mountain, biogenic volatile organic compounds (BVOCs), isoprene, monoterpenes, sesquiterpene

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