ORBi: Dufranne Delphine - Comparison of carbon fluxes, growth and productivity of a winter wheat crop in three contrasting growing seasons

Reference : Comparison of carbon fluxes, growth and productivity of a winter wheat crop in three con...


	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Agriculture & agronomy
	To cite this reference:	http://hdl.handle.net/2268/91884

Title :	Comparison of carbon fluxes, growth and productivity of a winter wheat crop in three contrasting growing seasons
Language :	English
Author, co-author :	Dufranne, Delphine [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
	Moureaux, Christine [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
	Vancutsem, Françoise [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
	Bodson, Bernard [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
	Aubinet, Marc [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
Publication date :	2011
Journal title :	Agriculture, Ecosystems & Environment
Publisher :	Elsevier Science
Volume :	141
Pages :	133-142
Audience :	International
ISSN :	0167-8809
City :	Amsterdam
Country :	The Netherlands
Keywords :	[en] Winter wheat crop ; Inter-annual variability ; development stage ; NEE ; GPP ; Yield ; Phenology
Abstract :	[en] Three winter wheat growing seasons were compared in order to analyse crop development, CO2 fluxes and inter-annual variability in productivity. Crop development monitoring, leaf scale measurements and continuous eddy-covariance measurements were conducted in a production crop at the Lonzée experimental site in Belgium. The 3 years were characterised by similar soil proprieties (same site), similar management (sowing, harvesting, plant protection and nitrogen application, adhering to regional standards), and the use of recommended cultivars (the most productive ones for this region). The comparison of carbon fluxes, growth and productivity in the three growing seasons highlighted mechanisms affected by meteorological conditions and, in some cases, modulated by a cultivar effect. In particular, it was shown that (a) precociousness or lateness in stage development was triggered mainly by cumulated temperature during winter and early spring; (b) early development in one season could explain the larger ecosystem net carbon sequestration that year, but had no impact on grain yield; (c) low grain yield in one season was the result of a complex mechanism including drought in early spring, which hindered flag leaf development, and moist conditions in late spring, which restrained radiation and favoured the development of fungal diseases. In all cases, it was found that grain yield could not be related to gross primary productivity or net ecosystem exchange, suggesting that reallocation and translocation processes play a substantial role in grain filling.
Funders :	Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Name of the research project :	Impact de la gestion culturale et du climat sur les flux de CO2, le développement et le rendement de grandes cultures
Permalink :	http://hdl.handle.net/2268/91884
DOI :	10.1016/j.agee.2011.02.023
Other URL :	http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6T3Y-52CY03W-2-1&_cdi=4959&_user=532038&_pii=S0167880911000612&_origin=browse&_coverDate=04%2F30%2F2011&_sk=998589998&view=c&wchp=dGLbVtz-zSkzV&md5=f79e629d3a365d49cf5f10128a7b1612&ie=/sdarticle.pdf

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