globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG004180
Scopus记录号: 2-s2.0-85043995578
论文题名:
Sun-Induced Chlorophyll Fluorescence, Photosynthesis, and Light Use Efficiency of a Soybean Field from Seasonally Continuous Measurements
作者: Miao G.; Guan K.; Yang X.; Bernacchi C.J.; Berry J.A.; DeLucia E.H.; Wu J.; Moore C.E.; Meacham K.; Cai Y.; Peng B.; Kimm H.; Masters M.D.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:2
起始页码: 610
结束页码: 623
语种: 英语
英文关键词: eddy-covariance ; hyperspectral ; light use efficiency ; photosynthesis ; soybean ; Sun-induced fluorescence
Scopus关键词: eddy covariance ; farming system ; fluorescence ; growing season ; growth ; light use efficiency ; measurement method ; net primary production ; photosynthesis ; photosynthetically active radiation ; physiological response ; satellite data ; solar radiation ; soybean ; Midwest ; United States ; Glycine max
英文摘要: Recent development of sun-induced chlorophyll fluorescence (SIF) technology is stimulating studies to remotely approximate canopy photosynthesis (measured as gross primary production, GPP). While multiple applications have advanced the empirical relationship between GPP and SIF, mechanistic understanding of this relationship is still limited. GPP:SIF relationship, using the standard light use efficiency framework, is determined by absorbed photosynthetically active radiation (APAR) and the relationship between photosynthetic light use efficiency (LUE) and fluorescence yield (SIFy). While previous studies have found that APAR is the dominant factor of the GPP:SIF relationship, the LUE:SIFy relationship remains unclear. For a better understanding of the LUE:SIFy relationship, we deployed a ground-based system (FluoSpec2), with an eddy-covariance flux tower at a soybean field in the Midwestern U.S. during the 2016 growing season to collect SIF and GPP data simultaneously. With the measurements categorized by plant growth stages, light conditions, and time scales, we confirmed that a strong positive GPP:SIF relationship was dominated by an even stronger linear SIF:APAR relationship. By normalizing both GPP and SIF by APAR, we found that under sunny conditions our soybean field exhibited a clear positive SIFy:APAR relationship and a weak negative LUE:SIFy relationship, opposite to the positive LUE:SIFy relationship reported previously in other ecosystems. Our study provides a first continuous SIF record over multiple growth stages for agricultural systems and reveals a distinctive pattern related to the LUE:SIFy relationship compared with previous work. The observed positive relationship of SIFy:APAR at the soybean site provides new insights of the previous understanding on the SIF's physiological implications. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114521
Appears in Collections:气候减缓与适应

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作者单位: Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States; National Center of Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States; Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States; USDA ARS Global Change and Photosynthesis Research Unit, Urbana, IL, United States; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, United States; Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Environmental and Climate Sciences Department, Brookhaven National Laboratory, Upton, NY, United States; Department of Geography and Geographic Information Science, University of Illinois at Urbana-Champaign, Urbana, IL, United States

Recommended Citation:
Miao G.,Guan K.,Yang X.,et al. Sun-Induced Chlorophyll Fluorescence, Photosynthesis, and Light Use Efficiency of a Soybean Field from Seasonally Continuous Measurements[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(2)
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