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Vertical distribution of gas exchanges and their integration throughout the entire canopy in a maize field
Xu, Zhenzhu; Zhou, Guangsheng1; He, Qijin2
2021
发表期刊PHOTOSYNTHESIS RESEARCH
ISSN0166-8595
卷号147期号:3页码:269-281
摘要Fluxes of carbon and water along a vertical profile within a canopy, particularly the associations between canopy and ecosystem levels, are not well studied. In this study, gas exchange along the vertical profile in a maize canopy was examined. The relationships between leaf- and ecosystem-level carbon and water fluxes were compared. The results from research conducted over two growing seasons showed that during vegetative growth, the top and middle leaf layers in the canopy contribute most to the carbon and water fluxes of the entire canopy. During the grain-filling stage, gas exchange processes were performed mostly in the middle leaves with and near the ears. Significant relationships were observed between the net ecosystem CO2 exchange rate (NEE) plus soil respiration and the assumed canopy levels (A(canopy)) and between evapotranspiration rates at the ecosystem (ET) and assumed canopy levels (E-canopy). This highlights the close associations between these parameters by integrating the leaf gas exchange rates measured in a conventional leaf cuvette and those at the ecosystem level via the eddy covariance technique. These results improve our understanding of how carbon assimilation varies vertically within a canopy, highlighting the critical role of ear leaves.
关键词Vertical distribution Carbon exchange Eddy covariance Stomatal conductance Evapotranspiration Maize canopy
学科领域Plant Sciences
DOI10.1007/s11120-020-00817-9
收录类别SCI
语种英语
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号WOS:000612613600001
出版者SPRINGER
文献子类Article
出版地DORDRECHT
EISSN1573-5079
资助机构National Key Research and Development Program of China [2016YFD0300106] ; China Special Fund for Meteorological Research in the Public Interest [GYHY201506001-3]
作者邮箱xuzz@ibcas.ac.cn ; gszhou@ibcas.ac.cn
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/26415
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China
3.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China
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Xu, Zhenzhu,Zhou, Guangsheng,He, Qijin. Vertical distribution of gas exchanges and their integration throughout the entire canopy in a maize field[J]. PHOTOSYNTHESIS RESEARCH,2021,147(3):269-281.
APA Xu, Zhenzhu,Zhou, Guangsheng,&He, Qijin.(2021).Vertical distribution of gas exchanges and their integration throughout the entire canopy in a maize field.PHOTOSYNTHESIS RESEARCH,147(3),269-281.
MLA Xu, Zhenzhu,et al."Vertical distribution of gas exchanges and their integration throughout the entire canopy in a maize field".PHOTOSYNTHESIS RESEARCH 147.3(2021):269-281.
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