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

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dc.contributor.author Wang, Jing en_US
dc.contributor.author Zhao, Tianbao en_US
dc.contributor.author Wang, Enli en_US
dc.contributor.author Yu, Qiang en_US
dc.contributor.author Yang, Xiaoguang en_US
dc.contributor.author Feng, Liping en_US
dc.contributor.author Pan, Xuebiao en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-02-02T08:43:21Z
dc.date.available 2012-02-02T08:43:21Z
dc.date.issued 2010 en_US
dc.identifier 2010003645 en_US
dc.identifier.citation Wang Jing et al. 2010, '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', Taylor and Francis, vol. 38, no. 2, pp. 119-135. en_US
dc.identifier.issn 0114-0671 en_US
dc.identifier.other C1UNSUBMIT 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 H2O 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 for the wheat crop and 1.87 g C MJ-1 for the 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. en_US
dc.language en_US
dc.publisher Taylor and Francis en_US
dc.relation.isbasedon http://dx.doi.org/10.1080/01140671.2010.482965 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.parent New Zealand Journal of Crop and Horticultural Science en_US
dc.journal.volume 38 en_US
dc.journal.number 2 en_US
dc.publocation USA en_US
dc.identifier.startpage 119 en_US
dc.identifier.endpage 135 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 070600 en_US
dc.personcode 0000052152 en_US
dc.personcode 0000068851 en_US
dc.personcode 0000062390 en_US
dc.personcode 107001 en_US
dc.personcode 0000068852 en_US
dc.personcode 0000068853 en_US
dc.personcode 0000068854 en_US
dc.percentage 100 en_US
dc.classification.name Horticultural Production en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords water use efficiency, radiation use efficiency, wheat-maize double-crop system, Eddy Covariance method en_US
dc.staffid en_US


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