References of "Dufrasne, Isabelle"
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See detailEffect of bovine colostrum intake on growth, reproductive parameters and survival in red kids
Harouna, Abdou; Marichatou, Hamani; Beckers, Jean-François ULg et al

in Journal of Animal Physiology & Animal Nutrition (in press)

The aim of this study is to evaluate the efficacy of frozen Azawak colostrum supplementation on body weight (BW), average daily gain (ADG), reproductive parameters (mean age at first parturition ... [more ▼]

The aim of this study is to evaluate the efficacy of frozen Azawak colostrum supplementation on body weight (BW), average daily gain (ADG), reproductive parameters (mean age at first parturition, fertility, fecundity, prolificacy) and mortality rate among red kids. The study was conducted at the goat farm secondary centre of Maradi in Niger from September 2010 to September 2011. The control animals (n = 20) were left with their mother, while the treatment animals (n = 20) received in addition 50 ml/animal/day of bovine colostrum at birth and 15 ml/animal/day from d2 to d15. Weight was measured weekly from birth to d365. Mortalities were also recorded over the same period. For reproductive parameters, observations began at weaning (d197). Growth rate was higher (p < 0.001) in supplemented animal, and the treatment effects on ADG were observed up to 150 day after the end of supplementation. A similar long-lasting trend was also observed in relation to the mortality rate (25% for ColG vs. 55% for ConG; p = 0.05). The age at first kidding tended to be lower in the treated group (13.8 0.7 vs. 14.1 0.8 month; p < 0.1). In conclusion, mild bovine colostrum supplementation induces a long-lasting positive impact on growth rate and to a lower extent on reproduction parameters and survival rate. [less ▲]

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See detailChemical composition of colostrum from Azawak cow in Niger compared with meta-analytical data
Abdou, Harouna; Marichatou, Hamani; Beckers, Jean-François ULg et al

in Animal Genetic Resources Information = Bulletin d'Information sur les Ressources Génétiques Animales = Boletin de Informacion sobre Recursos Geneticos Animales (in press)

This study aimed at comparing data obtained from Azawak zebu colostrum with literature data. The comparison was performed by a meta-analytical approach. Colostrum samples were hand-collected after 5 h ... [more ▼]

This study aimed at comparing data obtained from Azawak zebu colostrum with literature data. The comparison was performed by a meta-analytical approach. Colostrum samples were hand-collected after 5 h from 7 Azawak cows at calving between August 27, to September 10, 2009 in the Sahel. For data from literature, twenty one (21) references were identified in the following analytical databases: PubMed, Science Direct, Google scholar, Collection from University of Liege. The references were selected according to the following two criteria: i) only studies reported on bovine colostrum were used irrespective of breeds, and ii) among the selected studies, those not providing complete information to allow meta-analytical calculation were excluded. Samples were analyzed for immunoglobulins (IgG, IgM, IgA), lactoferrin, and chemical composition (dry mater, protein, fat, lactose, ash, Ca, P, NA, K, Mg). The mean levels of IgG, IgM, dry matter, protein and fat for Azawak cows were lower (P ˂ 0.001) than those obtained in other breeds; however colostrum from the Azawak was higher in IgA but the difference was not significant. For lactose and ash, mean values for Azawak cows were higher (P ˂ 0.001) than those from the literature. Contents of Ca, P, Na and Mg in Azawak bovine colostrum were significantly higher (P ˂ 0.001) than the mean levels in form the literature data. In conclusion, the colostrum from Azawak cows appears to be lower in most immunoglobulins, in fat and in protein than the values reported in the literature, but higher in lactose and minerals. This could be an adaptation to sahelian contraints. [less ▲]

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

in Small Ruminant Research (2013), 117

This study evaluated the effect of colostrum from Azawak cows on plasma protein profile, 24 growth, and survival in Red kids from Niger. Forty (40) newborn kids were allocated to one 25 of two treatment ... [more ▼]

This study evaluated the effect of colostrum from Azawak cows on plasma protein profile, 24 growth, and survival in Red kids from Niger. Forty (40) newborn kids were allocated to one 25 of two treatment-groups: control (free access to water and the mother) and colostrum (free 26 access to water and the mother, but with additional 50 mL of colostrum/animal/day of birth 27 and 25 mL/animal/day from the 2nd to 15th day of age). Blood samples were collected into 28 EDTA vacutainer tubes by jugular puncture at 10 and 30 days of age. Total protein was 29 quantified by the Biuret method. The agarose gel electrophoresis was used to determine the 30 serum levels of albumin, -globulin, β1-globulin, β2-globulin, γ-globulin and the 31 albumin/globulin ratio. The animals from the colostrum group showed higher body weight 32 and average daily gain when compared to the control group (P < 0.001). The average 33 concentration in protein at the both sampling times reached higher values in the colostrum 34 than in the control group. At D10, the colostrum group tended (P < 0.07) to show higher 35 levels of -globulin and had higher values (P < 0.05) for β1-globulin. At D30, total protein 36 and β2-globulins were higher in colostrum group. Colostrum from Azawak cows seems to 37 have positive effects on some plasma proteins levels and on growth rate in Red kids. [less ▲]

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See detailEvaluation de la Teneur Sanguine en Sélénium dans le Sang des Vaches en Wallonie (Belgique)
Mehdi, Youcef ULg; Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg et al

in 20ième Rencontre Recherches Ruminants (2013, December 04)

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See detailRetour d'expérience sur le robot de traite mobile
Lessire, Françoise ULg; Knapp, Emilie ULg; Dufrasne, Isabelle ULg

in Point Vétérinaire (2013), 341

Using a mobile robot to milk grazing cows influences their milk yield. Several factors influencing mik production are described in this paper as is their relative impact on the production.

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See detailMise en route d'un robot mobile: réponses aux contraintes techniques
Lessire, Françoise ULg; Knapp, Emilie ULg; Dufrasne, Isabelle ULg

in Point Vétérinaire (2013), 341

This paper explains the technical problems related to the use of a mobile automatic miking system and the solutions found at the University of Liege.

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See detailTraite robotisée et pâturage sont-ils compatibles?
Lessire, Françoise ULg; Knapp, Emilie ULg; Dufrasne, Isabelle ULg

in Point Vétérinaire (2013), 341

Combining automatic milking system and grazing is often considered as impossible. This paper defined the difficulties related to grazing cows milked by a robot and how to manage them.

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See detailAssessment of the selenium status in cattle herds in Wallonia
Mehdi, Youcef ULg; Dotreppe, Olivier ULg; Robaye, Vincent ULg et al

in 64th Annual Meeting of the European Federation of Animal Science (2013, August 26)

The selenium content is low in the soil of Wallonia, the southern part of Belgium. It is therefore logical that the selenium content in feedstuffs grown in these fields-grass, conserved forages, cereals ... [more ▼]

The selenium content is low in the soil of Wallonia, the southern part of Belgium. It is therefore logical that the selenium content in feedstuffs grown in these fields-grass, conserved forages, cereals and by-products- is also low. A survey was carried on 166 farms in Wallonia. The farms were located in 4 specific agronomy areas- Pays de Herve with mainly pastures (4farms)- Ardennes (a sub-mountainous area and pastures, 24 farms), Hesbays with mainly arable lands (55 farms) and Condroz with both pastures and arable (83 farms) There were herds with dairy cow, herds with beef cow and herds with both types of animals. The average age was 44±15 months for the cows and 18±6 months for the heifers. The blood samples were taken on five healthy animals of each herd, on the end of the winter just before the animals went to pastures. The selenium status was assessed by the activity of the Glutathion peroydase. The selenium status was extremely variable for the different farms of the 4 areas with variation coefficient of 56%. It was in Pays de Herve and in Hesbaye that the average selenium status was the highest at 53 and 56 µg Se/l. By contrast, it was in Ardenne and in Condroz that the status was the lowest, at 39 and 43 µg Se/l. The selenium status was, on the whole, higher in the dairy herds than in the beef herds owing to the higher selenium provision by the mineral mixtures and the compound feedstuffs added to the diet. Assuming that the normal selenium concentration in plasma being 70µg/l, it appeared also that 81% of the individual animals tested were below the normal Se concentration. It can thus be concluded from the present survey that the cattle herds in Wallonia are deficient in selenium. [less ▲]

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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 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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