References of "Dufrasne, Isabelle"
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See detailUsing mobile milking robots for special quality dairy products based on site specific grazing
Oudshoorn, F.W.; Philipsen, B.; Dufrasne, Isabelle ULg et al

in A Helgadóttir (Ed.) Grassland Science in Europe : The role of Grasslands in a Green Future - Threats and Perspectives in Less Favoured Areas (2013, June)

An option for combining grazing and automatic milking is Infield Automatic Milking, with more or less mobile infield automatic milking systems (IAMS), which have been practiced since 2008 in several ... [more ▼]

An option for combining grazing and automatic milking is Infield Automatic Milking, with more or less mobile infield automatic milking systems (IAMS), which have been practiced since 2008 in several European countries. This emerging technology can be used to harvest milk from specific areas, giving specialized dairies the possibility to market concept milk, cheese or butter. Terroir dairy can be a new way to increase marginal product value and thereby farm income. Three different options are described; i) the IAMS placed on a stationary platform in the field, ii) movable together with facilities necessary for the functionality from field to field, iii) as a self propelled moving unit that changes positions in the field every day, requiring transportation of the milk to the field border. All systems could guarantee dairy products based on maximum grazing for the period the pasture can provide sufficient feeding. Batch size depends on the dairies minimum process volume for the specific products, local conditions will be decisive for the amount of days needed for pooling before production. [less ▲]

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See detailEvaluation du troisième Programme de Gestion Durable de l'Azote en agriculture. Recommandations en matière de règlementations et de recherches scientifiques
Vandenberghe, Christophe ULg; Destain, Jean-Pierre ULg; Beckers, Yves ULg et al

in Vandenberghe, Christophe; Colinet, Gilles; Destain, Jean-Pierre (Eds.) et al 2ème Atelier Nitrate - Eau. Evaluation du Programme de Gestion Durable de l'Azote (2013)

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 detailAmélioration des bilans d'excrétion d'azote dans deux exploitations laitières de la région wallonne par un suivi raisonné des rations
Knapp, Emilie ULg; Istasse, Louis ULg; Hornick, Jean-Luc ULg et al

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

Deux exploitations laitières situées l'une en Pays de Herve et l'autre en Ardenne ont fait l'objet de suivis réalisés en vue de déterminer les bilans d'excrétion azotée. Dans la première exploitation, les ... [more ▼]

Deux exploitations laitières situées l'une en Pays de Herve et l'autre en Ardenne ont fait l'objet de suivis réalisés en vue de déterminer les bilans d'excrétion azotée. Dans la première exploitation, les vaches étaient divisées en deux groupes, à savoir le groupes de hautes productrices (HP) et le groupe des basses productrices (BP), chaque groupe recevant une ration spécifique. Dans la seconde exploitation, les animaux constituaient un seul groupe. [less ▲]

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See detailSelenium in the environment, metabolism and involvement in the body functions
Mehdi, Youcef; Hornick, Jean-Luc ULg; Istasse, Louis ULg et al

in Molecules (2013), 13

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See detailInfluence de facteurs environnementaux influençant la teneur en urée dans le lait de vache en Wallonie et estimation des rejets azotés
Dufrasne, Isabelle ULg; Knapp, Emilie ULg; Istasse, Louis ULg et al

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

En Wallonie, les teneurs en urée du lait de tank sont déterminées dans toutes les fermes lors de chaque livraison à la laiterie par le Comité du lait. Un total de 8 295 337 données récoltées pendant ... [more ▼]

En Wallonie, les teneurs en urée du lait de tank sont déterminées dans toutes les fermes lors de chaque livraison à la laiterie par le Comité du lait. Un total de 8 295 337 données récoltées pendant l’année 2000 et la période 2002-2011 ont été analysées à l’aide d’un modèle linéaire. Les effets fixes de la région agricole ou de l’appartenance à la zone vulnérable, du mois, de l’année, des interactions entre ces paramètres ont été inclus dans le modèle. Les teneurs en matières grasse et protéique ont été utilisées comme covariables. La moyenne des teneurs en urée dans le lait a été de 255 mg.l-1. Les modèles ont permis d’expliquer 38 % et 35 % des variations des teneurs en urée pour la région agricole et pour la zone vulnérable respectivement. À l’intérieur de ces modèles, le mois, la région, l’année et l’interaction mois – année ont été les composantes les plus explicatives. Les teneurs en urée ont été plus élevées pendant la période d’avril à octobre et les plus faibles pendant la période de novembre à mars (287 vs 210 mg.l-1). Cette observation peut être expliquée par le changement de ration. Pendant la période estivale, l’herbe constitue une part variable dans la ration et peut apporter une quantité d’azote excédentaire par rapport aux besoins des animaux. Quatre pour cent des observations ont été supérieures à 350 mg.l-1 pendant la période de novembre à mars et 14 % à 400 mg.l-1 pendant la période d’avril à octobre. Dans les régions agricoles limoneuse et sablo-limoneuse, les teneurs en urée ont été plus faibles qu’en Haute Ardenne et en Ardenne (223 et 220 mg vs 278 et 284 mg.l-1 respectivement). Dans la zone vulnérable, les teneurs en urée ont été plus basses que dans la zone non vulnérable (236 vs 273 mg.l-1). Les rejets annuels azotés calculés à partir de différentes équations ont varié de 82 à 119 kg N par vache selon la région agricole. [less ▲]

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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 detailInfluence de facteurs environnementaux influençant la teneur en urée dans le lait de vache en Wallonie et estimation des rejets azotés
Dufrasne, Isabelle ULg; Knapp, Emilie ULg; Istasse, Louis ULg et al

in Vandenberghe, Christophe; Colinet, Gilles; Destain, Jean-Pierre (Eds.) et al 2ème Atelier Nitrate-Eau, évaluation du programme de gestion durable de l'azote (2013)

En Wallonie, les teneurs en urée du lait de tank sont déterminées dans toutes les fermes lors de chaque livraison à la laiterie par le comité du lait. Un total de 8295337 données récoltées pendant l'année ... [more ▼]

En Wallonie, les teneurs en urée du lait de tank sont déterminées dans toutes les fermes lors de chaque livraison à la laiterie par le comité du lait. Un total de 8295337 données récoltées pendant l'année 2000 et la période 2002-201 ont été analysées à l'aide d'un modèle linéaire. [less ▲]

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See detailEffect of Azawak colostrum administration on plasma protein profile in red kid
Abdoul, H; Marichatou, H; Beckers, Jean-François ULg et al

in Proceedings of the 2nd Scientific Meeting of the Faculty of Veterinary Medicine (2012, October 19)

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See detailEffect of bovine Azawak colostrum administration on plasma protein profile in red kid.
Abdou, Harouna ULg; Marichatou, Hamani; Beckers, Jean-François ULg et al

Poster (2012, October 11)

This study evaluated the impact of heterologous Azawak colostrum administration on plasma protein profile in red kids from Niger. Forty (40) newborn kids were affected to one of two treatments: control ... [more ▼]

This study evaluated the impact of heterologous Azawak colostrum administration on plasma protein profile in red kids from Niger. Forty (40) newborn kids were affected to one of two treatments: control group (access to water and the mother) and colostrum group (access to the mother, water and additional 50 ml of colostrum Azawak/animal the day of birth, then 25ml/animal/day from the 2nd to 15th day). Blood samples (10ml/animal) were obtained at the age of 10 and 30 days by jugular puncture into EDTA vacutainer tubes. The quantification of total protein was performed by the Biuret method. The agarose gel electrophoresis was used to determine serum levels of albumin, ɑ-globulin, β1-globulin, β2-globulin, γ-globulin and finally the albumin/globulin ratio. In general, the average concentrations of these proteins obtained at both ages reached higher values in colostrum than in control group. At day 10, the colostrum group tended to show (P <0.07) higher levels for ɑ-globulin and showed higher values (P <0.04) for β1-globulin. At day 30, total protein and β2-globulins were higher in colostrum group. The administration of heterologous colostrum in kid seems to have positive effects on some plasma parameters. It would be worth to discriminate the plasma proteins derived from bovine and maternal colostra. [less ▲]

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See detailConcept of a mobile automatic milking system and first results at grazing
Dufrasne, Isabelle ULg

in Proceedings 2nd meeting EGF Working Group Grazing - Innovation in grazing (2012, October)

In Europe, farmers have to manage larger herds but, at the same time, want to have a normal social life. So, the automatic milking system (AMS) can bring solutions. This technology implies in most cases ... [more ▼]

In Europe, farmers have to manage larger herds but, at the same time, want to have a normal social life. So, the automatic milking system (AMS) can bring solutions. This technology implies in most cases, the cessation of grazing although grazing is appreciated by the consumers who consider it to be a natural practice. At the experimental farm of the University of Liege, the concept of a mobile milking robot has been developed with a private company. The prototype is used indoors during the winter season and is moved outdoors during the grazing season in pastures romote from the farm. [less ▲]

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See detailImportance de la qualité et de la quantité d'eau d'abreuvement pour les bovins laitiers.
Dufrasne, Isabelle ULg

Conference given outside the academic context (2012)

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See detailPhysiologie de la production et composition chimique du colostrum des grands mammifères domestiques: généralités
Abdou, Harouna; Marichatou, H; Beckers, Jean-François ULg et al

in Annales de Médecine Vétérinaire (2012), 156

In most mammals, the ingestion of colostrum is essential to the survival of the newborn. The main objective of this work is to synthesize data from studies on colostrum, especially on the physiology of ... [more ▼]

In most mammals, the ingestion of colostrum is essential to the survival of the newborn. The main objective of this work is to synthesize data from studies on colostrum, especially on the physiology of its production and its chemical composition. The sequence of events leading to the production of colostrum is identical in all species. However, the duration of these phases varies. Colostrum is rich in immunoglobulins (IgG, IgA, IgM, IgE and IgD), nutrients (proteins, lipids, lactose, minerals), hormones and growth factors (prolactin, insulin, estrogens, IgF), immune cells (leukocytes cells, epithelial cells), vitamins (carotene, vitamin E) and finally in enzymes such as lactoperoxidase and alkaline phosphatase. Its composition is dependent on many factors that can be divided into intrinsic ones, related to the animal, and extrinsic or environmental ones. Colostrum contains all the elements necessary to not only protection against attacks of pathogens but also to rapid growth of young animals. [less ▲]

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See detailEffects of environmental factors on yield and milking number in dairy cows milked by an automatic system located in pasture
Dufrasne, Isabelle ULg; Robaye, Vincent ULg; Knapp, Emilie ULg et al

in Grassland Science (2012), 17

A herd of 45 Holstein dairy cows was milked with an automatic milking system (AMS) located on a permanent pasture. The cows grazed from 22.06.2010 until 20.10.2010 on a rotational system. They were ... [more ▼]

A herd of 45 Holstein dairy cows was milked with an automatic milking system (AMS) located on a permanent pasture. The cows grazed from 22.06.2010 until 20.10.2010 on a rotational system. They were fetched twice a day to the AMS but they could also reach it freely. The sward height was measured at the entry and exit of each paddock. Data about daily milk yield and milking number were analysed according to a GLM including the effect of animal, days in paddock, distance between AMS and paddock, rotation cycle number and complementation. [less ▲]

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See detailInfluence of dietary selenium enrichment on performance and chemical composition of meat in Belgian Blue Bulls
Mehdi, Youcef ULg; Istasse, Louis ULg; Hornick, Jean-Luc ULg et al

in Proceedings of the 2nd Scientific Meeting of the Faculty of Veterinary Medicine (Liège – Belgium) (2012)

Selenium (Se) is a major structural component of various selenoproteins which contain a selenocysteine and a Se atom in their active site (except selenoprotein-P). They play an important role in many ... [more ▼]

Selenium (Se) is a major structural component of various selenoproteins which contain a selenocysteine and a Se atom in their active site (except selenoprotein-P). They play an important role in many functions, such as antioxidant defense and the formation of thyroid hormones. [less ▲]

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See detailProduction laitière et nombre de traites de vaches laitières en prairie avec un robot: effets des facteurs environnementaux.
Dufrasne, Isabelle ULg; Robaye, Vincent ULg; Knapp, Emilie ULg et al

Poster (2012)

En Belgique, comme dans d'autres pays européens, le recours à la traite robotisée est en augmentation. La majorité des troupeaux traits avec un robot ne pratique pas le pâturage car les exploitants ... [more ▼]

En Belgique, comme dans d'autres pays européens, le recours à la traite robotisée est en augmentation. La majorité des troupeaux traits avec un robot ne pratique pas le pâturage car les exploitants considèrent que cette méthode n'est pas conciliable avec le pâturage. La fragmentation des parcelles est aussi un frein au pâturage. La mise en place d'un robot dans une structure mobile permet d'utiliser le même robot à l'étable en hiver et dans les prairies distantes de l'exploitation en été. L'objectif de cette étude est de tester l'effet de facteurs environnementaux, l'animal, la complémentation, la distance entre le robot et la parcelle, les numéros du jour dans la parcelle et de cycle de rotation sur la production laitière (PL) et le nombre de traites (NT). [less ▲]

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See detailEffect of water availability on milking frequency and yield of dairy cows milked in pastures by an automatic milking system.
Dufrasne, Isabelle ULg; Robaye, Vincent ULg; Knapp, Emilie ULg et al

Poster (2012)

Nowadays farmers have to manage larger herds but at the same time, want to benefit from a normal social life. The automatic milking system (AMS) can be a solution. Its use can reduce physical labour and ... [more ▼]

Nowadays farmers have to manage larger herds but at the same time, want to benefit from a normal social life. The automatic milking system (AMS) can be a solution. Its use can reduce physical labour and allow flexibility. This technology can result in a reduction in grazing even though grazing is considered as a natural practice of the cows which is appreciated by the consumers. However, the milking frequency is decreased when outdoor grazing rather than an indoor feed systems is combined with automatic milking system (AMS) are combined compared to an indoor system. On pasture, cows tend to visit the AMS by group and enter in close succession. Improved cow traffic would allow increased milking frequency and avoid long waiting before milking. In this aim, effect of water availability in the grazing paddocks on the frequencies of cow visits to was tested. [less ▲]

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See detailAlimentation du veau à la vache : du veau à la vache.
Dufrasne, Isabelle ULg

Conference given outside the academic context (2011)

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