DOI: 10.1016/j.atmosenv.2016.12.041
Scopus记录号: 2-s2.0-85008318970
论文题名: Methanol emissions from maize: Ontogenetic dependence to varying light conditions and guttation as an additional factor constraining the flux
作者: Mozaffar A ; , Schoon N ; , Digrado A ; , Bachy A ; , Delaplace P ; , du Jardin P ; , Fauconnier M ; -L ; , Aubinet M ; , Heinesch B ; , Amelynck C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 152 起始页码: 405
结束页码: 417
语种: 英语
英文关键词: Emission modelling
; Guttation
; Maize
; Methanol
; VOC
Scopus关键词: Agriculture
; Atmospheric chemistry
; Crops
; Ecology
; Ecosystems
; Environmental chambers
; Grain (agricultural product)
; Methanol
; Organic compounds
; Volatile organic compounds
; Biogenic volatile organic compounds
; Developmental stage
; Emission inventories
; Emission modelling
; Guttation
; Maize
; Photosynthetic photon flux densities
; Production function
; Plants (botany)
; carbon dioxide
; methanol
; nitrogen
; volatile organic compound
; agricultural emission
; agricultural land
; atmospheric chemistry
; biogenic emission
; emission inventory
; flux measurement
; leaf area
; maize
; methanol
; volatile organic compound
; air temperature
; Article
; boundary layer
; conductance
; guttation
; humidity
; leaf area
; leaf gas exchange
; light
; maize
; nonhuman
; photosynthetic photon flux density
; photosynthetically active radiation
; plant development
; plant growth
; priority journal
; seedling
; stomatal conductance
; temperature
; vapor pressure
; Zea mays
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Because of its high abundance and long lifetime compared to other volatile organic compounds in the atmosphere, methanol (CH3OH) plays an important role in atmospheric chemistry. Even though agricultural crops are believed to be a large source of methanol, emission inventories from those crop ecosystems are still scarce and little information is available concerning the driving mechanisms for methanol production and emission at different developmental stages of the plants/leaves. This study focuses on methanol emissions from Zea mays L. (maize), which is vastly cultivated throughout the world. Flux measurements have been performed on young plants, almost fully grown leaves and fully grown leaves, enclosed in dynamic flow-through enclosures in a temperature and light-controlled environmental chamber. Strong differences in the response of methanol emissions to variations in PPFD (Photosynthetic Photon Flux Density) were noticed between the young plants, almost fully grown and fully grown leaves. Moreover, young maize plants showed strong emission peaks following light/dark transitions, for which guttation can be put forward as a hypothetical pathway. Young plants’ average daily methanol fluxes exceeded by a factor of 17 those of almost fully grown and fully grown leaves when expressed per leaf area. Absolute flux values were found to be smaller than those reported in the literature, but in fair agreement with recent ecosystem scale flux measurements above a maize field of the same variety as used in this study. The flux measurements in the current study were used to evaluate the dynamic biogenic volatile organic compound (BVOC) emission model of Niinemets and Reichstein. The modelled and measured fluxes from almost fully grown leaves were found to agree best when a temperature and light dependent methanol production function was applied. However, this production function turned out not to be suitable for modelling the observed emissions from the young plants, indicating that production must be influenced by (an) other parameter(s). This study clearly shows that methanol emission from maize is complex, especially for young plants. Additional studies at different developmental stages of other crop species will be required in order to develop accurate methanol emission algorithms for agricultural crops. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82538
Appears in Collections: 气候变化事实与影响
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作者单位: Ecosystems - Atmosphere Exchanges, Dept. of Biosystem Engineering, University of Liege, Gembloux Agro-Bio Tech, 8 Avenue de la Faculté, Gembloux, Belgium; Royal Belgian Institute for Space Aeronomy, Ringlaan 3, Brussels, Belgium; Unit of Plant Biology, University of Liege, Gembloux Agro-Bio Tech, 2 Passage des Déportés, Gembloux, Belgium; Agro-Bio Systems Chemistry, University of Liege, Gembloux Agro-Bio Tech, 2 Passage des Déportés, Gembloux, Belgium; Department of Analytical Chemistry, Ghent University, Krijgslaan 281-S12, Ghent, Belgium
Recommended Citation:
Mozaffar A,, Schoon N,, Digrado A,et al. Methanol emissions from maize: Ontogenetic dependence to varying light conditions and guttation as an additional factor constraining the flux[J]. Atmospheric Environment,2017-01-01,152