Measurement and simulation of diurnal variations in water use efficiency and radiation use efficiency in an irrigated wheat-maize field in the North China Plain

Wang, J; Zhao, T; Wang, E; Yu, Q; Yang, X; Feng, L; Pana, X

Measurement and simulation of diurnal variations in water use efficiency and radiation use efficiency in an irrigated wheat-maize field in the North China Plain

Wang, J Zhao, T Wang, E Yu, Q

Yang, X Feng, L Pana, X

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Publication Type:: Journal Article
Citation:: New Zealand Journal of Crop and Horticultural Science, 2010, 38 (2), pp. 119 - 135
Issue Date:: 2010-06-01

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Field	Value	Language
dc.contributor.author	Wang, J	en_US
dc.contributor.author	Zhao, T	en_US
dc.contributor.author	Wang, E	en_US
dc.contributor.author	Yu, Q https://orcid.org/0000-0001-6950-1821	en_US
dc.contributor.author	Yang, X	en_US
dc.contributor.author	Feng, L	en_US
dc.contributor.author	Pana, X	en_US
dc.date.issued	2010-06-01	en_US
dc.identifier.citation	New Zealand Journal of Crop and Horticultural Science, 2010, 38 (2), pp. 119 - 135	en_US
dc.identifier.issn	0114-0671	en_US
dc.identifier.uri	http://hdl.handle.net/10453/15030
dc.description.abstract	Quantifying diurnal patterns of water use efficiency (WUE) and radiation use efficiency (RUE) for wheat and maize is important for assessing water use by plants and crop productivity. Water and carbon dioxide fluxes from an irrigated wheat-maize double-crop field from November 2002 to October 2003 were measured using the Eddy Covariance method. Evident differences were observed between the diurnal patterns of WUE for wheat and maize. The WUE values of wheat peaked near 9, 15 and 12 mg CO2 g H2O in the morning, and then decreased linearly with time and recovered in the late afternoon (4:00pm) before sunset in March, April and May, respectively. The WUE of maize increased after sunrise and retained stable values of 6, 14 and 12 mg CO2 g H 2O from mid-morning to mid-afternoon (10:00am -2:00pm) and then decreased slowly with time until sunset in July, August and September, respectively. Similar patterns were observed in the RUE of wheat and maize. Over the three months of the study, averaged RUE was 1.76 g C MJ-1 forthe wheat crop and 1.87 g C MJ-1 forthe maize crop. A coupled photosynthesis and transpiration model was used to simulate the diurnal variations in WUE under variable climate conditions. Measurement results and sensitivity analysis show that the difference in the diurnal variation pattern in WUE between wheat and maize resulted from the different carbon fixing mechanisms of wheat and maize. © 2010 The Royal Society of New Zealand.	en_US
dc.relation.ispartof	New Zealand Journal of Crop and Horticultural Science	en_US
dc.relation.isbasedon	10.1080/01140671.2010.482965	en_US
dc.subject.classification	Horticulture	en_US
dc.title	Measurement and simulation of diurnal variations in water use efficiency and radiation use efficiency in an irrigated wheat-maize field in the North China Plain	en_US
dc.type	Journal Article
utslib.citation.volume	2	en_US
utslib.citation.volume	38	en_US
utslib.for	0706 Horticultural Production	en_US
utslib.for	0703 Crop and Pasture Production	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.issue	2	en_US
pubs.publication-status	Published	en_US
pubs.volume	38	en_US

Abstract:

Quantifying diurnal patterns of water use efficiency (WUE) and radiation use efficiency (RUE) for wheat and maize is important for assessing water use by plants and crop productivity. Water and carbon dioxide fluxes from an irrigated wheat-maize double-crop field from November 2002 to October 2003 were measured using the Eddy Covariance method. Evident differences were observed between the diurnal patterns of WUE for wheat and maize. The WUE values of wheat peaked near 9, 15 and 12 mg CO2 g H2O in the morning, and then decreased linearly with time and recovered in the late afternoon (4:00pm) before sunset in March, April and May, respectively. The WUE of maize increased after sunrise and retained stable values of 6, 14 and 12 mg CO2 g H 2O from mid-morning to mid-afternoon (10:00am -2:00pm) and then decreased slowly with time until sunset in July, August and September, respectively. Similar patterns were observed in the RUE of wheat and maize. Over the three months of the study, averaged RUE was 1.76 g C MJ-1 forthe wheat crop and 1.87 g C MJ-1 forthe maize crop. A coupled photosynthesis and transpiration model was used to simulate the diurnal variations in WUE under variable climate conditions. Measurement results and sensitivity analysis show that the difference in the diurnal variation pattern in WUE between wheat and maize resulted from the different carbon fixing mechanisms of wheat and maize. © 2010 The Royal Society of New Zealand.

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http://hdl.handle.net/10453/15030