References of "Destain, Jean-Pierre"
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See detailEvaluation of the third Action Programme. Recommendations for regulatory and scientific research
Vandenberghe, Christophe ULg; Destain, Jean-Pierre ULg; Beckers, Yves ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2013), 17(SPL1), 301-306

In accordance with the Nitrates Directive, the third "Durable Nitrogen Management Plan" (PGDA) will be soon reviewed in Wallonia (Belgium). The second "Nitrate - Water" workshop took place between 28th ... [more ▼]

In accordance with the Nitrates Directive, the third "Durable Nitrogen Management Plan" (PGDA) will be soon reviewed in Wallonia (Belgium). The second "Nitrate - Water" workshop took place between 28th May and 1st June 2012. The workshop was attended by both Belgian scientists (Université catholique de Louvain - UCL, Walloon Agricultural Research Center CRA-W, Université de Liège - ULg, Gembloux Agro-Bio Tech) and French scientists (National Institute for Agricultural Research - INRA). In the light of the results of experiments presented by scientists at this workshop, modifications to the PGDA are now recommended. These concern organic and mineral nitrogen fertilization for crops and meadows; catch crops; soil nitrate-nitrogen residue limitation in autumn, at the start of the nitrate leaching period; the management of meadow ploughing and a modification of the dairy cow standard for nitrogen production. [less ▲]

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See detailVers un système de prédiction du rendement en temps réel
Dumont, Benjamin ULg; Ferrandis Vallterra, Salvador ULg; Leemans, Vincent ULg et al

Poster (2012, October 16)

L'objectif de cette recherche est le développement d'un outil capable de prédire les rendements d'une culture de blé en temps réel, au fur et à mesure que la saison avance. Pour atteindre cet objectif ... [more ▼]

L'objectif de cette recherche est le développement d'un outil capable de prédire les rendements d'une culture de blé en temps réel, au fur et à mesure que la saison avance. Pour atteindre cet objectif, nous avons développé une méthodologie qui repose sur l'adjonction des éléments suivants : (i) le modèle de culture STICS (INRA, France), (ii) un réseau de capteurs sans fil pour le monitoring des variables agro-environnementales (éKo system, The Crossbow technologies, USA) et (iii) une base de données météorologiques. [less ▲]

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See detailLivre Blanc Céréales - Gembloux - Informations avant les semis
Destain, Jean-Pierre ULg; Bodson, Bernard ULg

Book published by Gembloux Agro-Bio Tech - Edition Septembre 2012 (2012)

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See detailAssessing the potential of an algorithm based on mean climatic data to predict wheat yield.
Dumont, Benjamin ULg; Leemans, Vincent ULg; Ferrandis Vallterra, Salvador ULg et al

in Proceedings of the 11th International Conference on Precision Agriculture (2012, July)

Real-time non-invasive determination of crop biomass and yield prediction are maybe among the major challenges in agriculture. But unknown future weather remains the key point of accurate yield forecast ... [more ▼]

Real-time non-invasive determination of crop biomass and yield prediction are maybe among the major challenges in agriculture. But unknown future weather remains the key point of accurate yield forecast. This paper presents the results of a preliminary study that aims to supply the unknown future by daily mean climatic data. The results show that under the Belgian weather, this approach is relevant. Furthermore, the developed methodology appears to be a powerful diagnosis tool of the remaining yield potential under ongoing weather. [less ▲]

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See detail4. La fumure azotée
Vancutsem, Françoise ULg; Seutin, Benoit ULg; Destain, Jean-Pierre ULg et al

in Livre Blanc - Céréales - Gembloux (2012, February 29)

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See detailLivre Blanc Céréales - Gembloux
Destain, Jean-Pierre ULg; Bodson, Bernard ULg

Book published by Gembloux Agro-Bio Tech - Edition février 2012 (2012)

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See detailA first step towards a real-time predictive yield support system.
Dumont, Benjamin ULg; Leemans, Vincent ULg; Ferrandis Vallterra, Salvador ULg et al

in Agriculture & Engineering for a Healthier Life (2012)

Real-time non-invasive determination of crop biomass and yield prediction are maybe among the major challenges in agriculture. But unknown future weather remains the key point of accurate yield forecast ... [more ▼]

Real-time non-invasive determination of crop biomass and yield prediction are maybe among the major challenges in agriculture. But unknown future weather remains the key point of accurate yield forecast. This paper presents the results of a preliminary study that aims to supply the unknown future by daily mean climatic data. The results show that, under the Belgian weather, this approach is relevant. Furthermore, the developed methodology appears to be a powerful diagnosis tool of the remaining yield potential under ongoing weather. [less ▲]

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See detailSimulation de la croissance du blé à l’aide de modèles écophysiologiques : Synthèse bibliographique des méthodes, potentialités et limitations.
Dumont, Benjamin ULg; Vancutsem, Françoise ULg; Seutin, Benoit ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2012), 16(3), 376-386

Crop models describe the growth and development of a crop interacting with its surrounding agro-environmental conditions (soil, climate and close conditions of the plant). However, the implementation of ... [more ▼]

Crop models describe the growth and development of a crop interacting with its surrounding agro-environmental conditions (soil, climate and close conditions of the plant). However, the implementation of such models remains difficult because of the high number of explanatory variables and parameters. It often happens that important discrepancies appear between measured and simulated values. This article aims to highlight the different sources of uncertainty related to the use of crop models, as well as the actual methods that allow to compensate or, at least, to consider these sources of error during the model result analysis. This article presents a literature review that firstly synthetises the general mathematical structure of crop models. The main criteria for evaluating crop models are then described. Finally, several methods used for improving models are given. Parameter estimation methods, including frequentist and Bayesian approaches, are presented and data assimilation methods are reviewed. [less ▲]

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See detail4. La fumure azotée
Vancutsem, Françoise ULg; Seutin, Benoit ULg; Destain, Jean-Pierre ULg et al

in Livre Blanc: Céréales - Gembloux (2011, February 23)

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See detailRespiration of three Belgian crops: Partitioning of total ecosystem respiration in its heterotrophic, above- and below-ground autotrophic components
Suleau, Marie ULg; Moureaux, Christine ULg; Dufranne, Delphine ULg et al

in Agricultural and Forest Meteorology (2011), (151), 633-643

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 ... [more ▼]

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. [less ▲]

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See detailREAL-TIME MONITORING OF ENVIRONMENTAL FACTORS TO MODEL WHEAT YIELD PRODUCTION
Dumont, Benjamin ULg; Leemans, Vincent ULg; Lebeau, Frédéric ULg et al

Poster (2010, September 07)

This paper presents the results of a one year preliminary study in which a real-time monitoring system was used to feed the STICS soil crop model. The monitoring system was made of a self-organising ... [more ▼]

This paper presents the results of a one year preliminary study in which a real-time monitoring system was used to feed the STICS soil crop model. The monitoring system was made of a self-organising wireless network within which microsensors collected and stored microclimatic and environmental data. As indicated by the statistical criteria (RMSE, normalized deviation and model efficiency), the optimisation of some wheat crop parameters allows the STICS model to predict the yields with good accuracy for three different soil types and seven different nitrogen application rates. [less ▲]

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See detailA MODEL FOR WHEAT YIELD PREDICTION BASED ON REAL-TIME MONITORING OF ENVIRONMENTAL FACTORS
Dumont, Benjamin ULg; Lebeau, Frédéric ULg; Vancutsem, Françoise ULg et al

Poster (2010, July)

This paper presents the results of a one year preliminary study in which a real time monitoring system was used to feed the STICS soil crop model. As indicated by the statistical criteria (RMSE and model ... [more ▼]

This paper presents the results of a one year preliminary study in which a real time monitoring system was used to feed the STICS soil crop model. As indicated by the statistical criteria (RMSE and model efficiency), the optimization of some wheat crop parameters allows the model to predict the yields with good accuracy for different soil type and different nitrogen application rates. [less ▲]

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See detailLa fumure azotée
Destain, Jean-Pierre ULg; Roisin, Christian; Marcoen, Jean Marie ULg et al

in Livre Blanc: Céréales - Gembloux (2010, February 24)

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See detailL'isotope stable 15Net le lysimètre, des outils complémentaires pour l'étude de la lixiviation de l'azote dans les sols agricoles
Destain, Jean-Pierre ULg; Fonder, Nathalie; Xanthoulis, Dimitri ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2010), 14(S1), 91-96

L’isotope stable 15N a été utilisé dans des expérimentations en cases lysimétriques visant à étudier la lixiviation de l’azote dans les sols agricoles. À Gembloux, un apport de nitrate l’ammoniaque ... [more ▼]

L’isotope stable 15N a été utilisé dans des expérimentations en cases lysimétriques visant à étudier la lixiviation de l’azote dans les sols agricoles. À Gembloux, un apport de nitrate l’ammoniaque présentant une abondance isotopique de 2,161 At%15N a été appliqué à raison de 200 kg N.ha-1 dans deux lysimètres, avant une culture d’épinard suivie de haricot et d’un froment d’hiver. La récupération de l’azote par les cultures a été de 39,8 % dans le premier lysimètre et de 62,2 % dans le second. Les concentrations en azote nitrique des eaux percolées du second ont été constamment plus élevées que dans le premier, probablement à cause d’une moindre immobilisation microbienne. À Remicourt et Omal, un reliquat de 150 kg N.ha-1 (simulé par un apport de 15NH4 15NO3 en automne) a complètement disparu du profil du sol (0-90 cm) dès juillet de l’année suivante. Une culture de froment d’hiver à Omal n’a récupéré qu’environ 9 % de l’azote apporté à l’automne. La mesure de la teneur en azote nitrique des eaux percolées a montré des valeurs nettement plus élevées à Remicourt (jusqu’à plus de 70 mg N.l-1) suite à un apport important de compost riche en azote, qu’à Omal. L’isotope 15N n’a pu être détecté dans aucune des eaux lysimétriques, probablement par un manque de sensibilité de l’appareil. [less ▲]

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See detailEvaluation et proposition de révision du deuxième Programme de Gestion Durable de l'Azote en agriculture en Région wallonne (Belgique)
Vandenberghe, Christophe ULg; Benoit, Jérémie ULg; Deneufbourg, Mathieu ULg et al

in Marcoen, Jean Marie; Vandenberghe, Christophe (Eds.) Actes de l'Atelier "Nitrate - Eau" 2 au 5 juin 2009. Peyresq, France (2010)

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See detailL'isotope stable 15N et le lysimètre, des outils complémentaires pour l'étude de la lixiviation de l'azote dans les sols agricoles.
Destain, Jean-Pierre ULg; Fonder, Nathalie ULg; Xanthoulis, Dimitri ULg et al

in Vandenberghe, Christophe; Marcoen, Jean Marie (Eds.) Atelier Nitrate-Eau. Evaluation du Programme de Gestion Durable de l'Azote. (2010)

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See detailVariétés: escourgeon et orge d'hiver fourragers
Herman, Jean-Luc; Monfort, Bruno; Couvreur, Luc et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2009, September 10)

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