林业科学2016，Vol.52Issue(11)：19-28,10.DOI:10.11707/j.1001-7488.20161103
温带典型森林树种的萜烯类化合物排放及其与环境要素的相关性
Correlation between Terpenes Emission from Typical Forest Tree Species and Environmental Elements in Temperate Zone
摘要
Abstract
Objective]Determining the emission types,relative content and rate of terpene compounds from plant source could provide the theoretical basis for establishing volatile organic compounds ( VOCs) composition library of plant source and optimal deployment of urban forest.[Method]Half-closed cycling air collection model was used with Li-6400 portable photosynthesis system,Tenax absorption tube and gas pump together to collect plant volatile organic compounds in Beijing Jiufeng National Forest Park,and used to explore the differences of biogenic VOCs emission emitted by different tree species ( coniferous species: Pinus tabulaeformis,Platycladus orientalis; broad-leaved species: Populus tomentosa, Quercus variabilis, Acer mono ) and to analyze the relations between the VOCs emission and environmental and physiological factors.[Result]All the 5 typical forest tree species emitted alkanes, olefine, polycyclic aromatic hydrocarbons and halogenated-hydrocarbons. From the aspect of volatile relative content,Platycladus orientalis and Pinus tabulaeformis emitted mainly monoterpene,to which alpha-pinene contributed about 34. 16% and 25. 05% respectively. Populus tomentosa,Q. variabilis and A. mono mainly emitted isoprene,accounting for 76. 47%,55. 25% and 32. 61%respectively of the total emission. As for the diurnal variation pattern,isoprene emission from the 5 tree species displayed a single-peak distribution with the peak appeared between 11:00 and 12:00 . The peak value of monoterpene was between 10:00 and 13:00 ,and valley value was between 17:00 and 18:00 . The VOCs emission rate of the unit leaf area of Populus tomentosa was the largest,reaching 52. 81 nmol·m -2 s -1 ,followed by Pinus tabulaeformis. The emission rate of alpha-pinene and cinene of Platycladus orientalis were the largest,up to 4. 16 nmol·m -2 s -1 and 3. 82 nmol·m -2 s -1 respectively. The emission rate of myrcene and alpha-pinene of Pinus tabulaeformis were large,up to 22. 14 nmol·m -2 s -1 and 10. 3 nmol·m -2 s -1 respectively. Overall,the isoprene emission rate of unit leaf area of broad-leaved species was higher,while the monoterpene emission rate of unit leaf area of coniferous species was higher. During the period of monitoring,the relative content of terpene was significantly positively correlated with temperature and photosynthetic intensity,but negatively correlated with relative humidity. The relative content of terpene was significanly positvely correlated with the net photosynthetic rate, stomatal conductance, intercellular carbon dioxide concentration and transpiration rate.[Conclusion]Broad-leaved trees emit more isoprene,coniferous tree species emit more monoterpene. The relative content of terpene emitted by plant was increased with the temperature and photosynthetic intensity and reduced with relative humidity. The variation of net photosynthetic rate,stomatal conductance and transpisration rate showed a great consistence with the relative content of terpene from tree species.关键词
森林树种/挥发性有机物/异戊二烯/单萜烯/排放速率Key words
forest tree species/volatile organic compounds/isoprene/monoterpene/emission rate分类
资源环境引用本文复制引用
花圣卓,陈俊刚,余新晓,毕华兴,付妍琳,陈静,孙丰宾..温带典型森林树种的萜烯类化合物排放及其与环境要素的相关性[J].林业科学,2016,52(11):19-28,10.基金项目
产学研联合培养研究生基地项目(BLCXY201617) （BLCXY201617）
林业公益性行业科研项目“森林对PM2.5等颗粒物的调控功能与技术研究”(201304301) （201304301）
北京市共建项目专项。 （）
