Reference : Respiration of three Belgian crops: Partitioning of total ecosystem respiration in its h...
Scientific journals : Article
Life sciences : Agriculture & agronomy
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/37722
Respiration of three Belgian crops: Partitioning of total ecosystem respiration in its heterotrophic, above- and below-ground autotrophic components
English
Suleau, Marie [Université de Liège - ULg > Département de physique > Optofluidique >]
Moureaux, Christine mailto [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
Dufranne, Delphine mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
Buysse, Pauline mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
Bodson, Bernard mailto [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
Destain, Jean-Pierre mailto [Université de Liège - ULg > Sciences agronomiques > Phytotechnie des régions tempérées >]
Heinesch, Bernard mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
Debacq, Alain mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
Aubinet, Marc mailto [Université de Liège - ULg > Sciences et technologie de l'environnement > Physique des bio-systèmes >]
2011
Agricultural and Forest Meteorology
Elsevier Science
151
633-643
Yes (verified by ORBi)
International
0168-1923
Amsterdam
The Netherlands
[en] TER ; Autotrophic respiration ; Heterotrophic respiration ; GPP ; Crop
[en] An experimental system combining an eddy covariance system, a micrometeorological station and soil chambers placed in planted areas and in root exclusion zones was installed during three successive years in a production crop managed in a traditional way at the Lonzée experimental site (Belgium). Measurements were made successively on seed potato, winter wheat and sugar beet. The general objectives of the study were, first to evaluate the relative contributions to total ecosystem respiration (TER) of heterotrophic, above ground autotrophic and below ground autotrophic respiration over a succession of three agricultural crops (seed potato, winter wheat and sugar beet) cultivated on successive years at the same location and, secondly, to identify the driving variables of these contributions.
Results showed that, during the observation periods, TER was dominated by autotrophic respiration
(AR) (60–90%) and that AR was dominated by its above ground component (60–80%). HR was found to increase with temperature and to be independent of Gross Primary Production (GPP), whereas AR was driven by GPP and was mostly independent of temperature. The AR response to GPP was specific to the crop: not only AR intensity but also AR distribution between its above- (ARa) and below- (ARb) ground components were found to differ from one crop to another and, in the winter wheat, from one development stage to another. Generally, ARb contribution to AR was found larger when carbon allocation towards roots was more important.
An uncertainty analysis was made and showed that the main sources of uncertainties on the estimates were the spatial variability for soil chamber measurements and uncertainties linked to the data gap filling method for eddy covariance measurements.
Researchers ; Professionals
http://hdl.handle.net/2268/37722
10.1016/j.agrformet.2011.01.012

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