Reference : Comparison of carbon fluxes, growth and productivity of a winter wheat crop in three con...
Scientific journals : Article
Life sciences : Agriculture & agronomy
http://hdl.handle.net/2268/91884
Comparison of carbon fluxes, growth and productivity of a winter wheat crop in three contrasting growing seasons
English
Dufranne, Delphine mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
Moureaux, Christine mailto [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
Vancutsem, Françoise [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
Bodson, Bernard mailto [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
Aubinet, Marc mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
2011
Agriculture, Ecosystems & Environment
Elsevier Science
141
133-142
Yes (verified by ORBi)
International
0167-8809
Amsterdam
The Netherlands
[en] Winter wheat crop ; Inter-annual variability ; development stage ; NEE ; GPP ; Yield ; Phenology
[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.
Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Impact de la gestion culturale et du climat sur les flux de CO2, le développement et le rendement de grandes cultures
http://hdl.handle.net/2268/91884
10.1016/j.agee.2011.02.023
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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