http://hdl.handle.net/2268/137 Search this channel search http://orbi.ulg.ac.be/simple-search http://hdl.handle.net/2268/148540 Title: Investir dans la durabilité des productions porcines : un chantier wallon. <br/> <br/>Author, co-author: Picron, Pascale http://hdl.handle.net/2268/148336 Title: Growth, body development and reproduction in Belgian Blue cattle as influenced by management <br/> <br/>Author, co-author: Evrard, Pierre; de Behr, Vanessa; Raskin, Pascale; Gerard, Olivier; Dufrasne, Isabelle; Istasse, Louis; EAAP http://hdl.handle.net/2268/148335 Title: Suckler beef production in Belgium: comparison between different intensification levels <br/> <br/>Author, co-author: Raskin, Pascale; Dehareng, Daniel; Ledent, Anne; Dufrasne, Isabelle; Istasse, Louis http://hdl.handle.net/2268/148334 Title: Carcass and fatty acid composition of dual purpose type bulls as influenced by feed restriction during the growing period <br/> <br/>Author, co-author: Clinquart, Antoine; Van Eenaeme, Christian; Dufrasne, Isabelle; Raskin, Pascale; Istasse, Louis http://hdl.handle.net/2268/148332 Title: Effects on animal performance of a fat concentrate in diets for growing fattening bulls <br/> <br/>Author, co-author: Istasse, Louis; Clinquart, Antoine; Dufrasne, Isabelle; Van Eenaeme, Christian; Bienfait, Jean-Marie http://hdl.handle.net/2268/148325 Title: Concept of a mobile automatic milking system and first results at grazing <br/> <br/>Author, co-author: Dufrasne, Isabelle <br/> <br/>Abstract: 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. http://hdl.handle.net/2268/148132 Title: Effect of clenbuterol on animal performances, plasma hormones and metabolites in fattening cattle <br/> <br/>Author, co-author: Dufrasne, Isabelle; Istasse, Louis; Van Eenaeme, Christian; Buts, B.; Baldwin, Paule; Demeyer, Daniel; Bienfait, Jean-Marie http://hdl.handle.net/2268/148120 Title: Egg Production Performance of the Local Kabyle Hen and its Crossbreeds with ISA-Brown Strain in Semi-Intensive Conditions <br/> <br/>Author, co-author: Moula, Nassim; Mamadou Tandiang, Diaw; Salhi, Abdellah; Farnir, Frédéric; Antoine-Moussiaux, Nicolas; Leroy, Pascal <br/> <br/>Abstract: A cross between the ISA-Brown industrial strain and an Algerian local (Kabyle) breed was compared with the Algerian local (Kabyle) hen. The comparison during the egg production period was done in individual cages, in a ventilated henhouse without any particular isolation. The same commercial diet has been provided over three time periods (35 to 36 weeks, 50 to 51 weeks and 65 to 66 weeks of age). Egg number and body weight at first egg was significantly lower in the Kabyle local breed. Mortality was almost equal during the breeding period and the egg production periods for the two genotypes. The Kabyle hen eggs, in spite of a weight which was lower (43.70 to 53.37 g according to the age), gave yolk to albumen ratio similar to the ISAKAB cross (0.52 to 0.58 according to age). Finally, the ISAKAB cross was better in terms of egg production and egg quality than the local hen, in test conditions. http://hdl.handle.net/2268/148112 Title: Effect of water availability on milking frequency and yield of dairy cows milked in pastures by an automatic milking system. <br/> <br/>Author, co-author: Dufrasne, Isabelle; Robaye, Vincent; Knapp, Emilie; Istasse, Louis; Hornick, Jean-Luc <br/> <br/>Abstract: 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. http://hdl.handle.net/2268/148082 Title: Emissions of NH3 and greenhouse gases from pig houses: Influencing factors and mitigation techniques <br/> <br/>Author, co-author: Philippe, François-Xavier http://hdl.handle.net/2268/148019 Title: L'équilibre des rations alimentaires des bovins: Quelques pistes pour améliorer l'efficience azotée ? <br/> <br/>Author, co-author: Beckers, Yves <br/> <br/>Abstract: The main aim of this paper was to present some feeding recommendations, which, when applied on the farm, would increase nitrogen use by bovines and to give information as to how the effects of the nitrogen produced can be reduced. Ruminants have the ability to digest structural carbohydrates and to produce meat and milk proteins for human consumption. At the animal cells level, amino acids are essential for biological functions, mainly involving their maintenance and production. These amino acids are supplied by the intestinal digestion of microbial protein and feed protein that escapes microbial degradation in the rumen. Today, the efficiency of nitrogen utilization is typically low and highly variable in ruminants. Nitrogen excretion by ruminants mainly depends on the level of nitrogen intake and of the animal's productivity. Optimal N utilization may be achieved through an understanding of the key mechanisms involved in the control of N digestion and metabolism. These include the efficiency of N capture in the rumen and the protein degradation according to the type of diet and forage, the control of the rumen microorganisms involved in protein degradation and the proper formulation of the diet, avoiding feeding excess protein in relation to requirements. The dependence on energy supply in transferring feed nitrogen into milk and meat protein is strong both at the rumen and the cell levels of ruminants. The rumen metabolism is identified as the single most important factor contributing to the low level of efficient use of nitrogen in ruminants and partially depends on practical farming operations.; L’objet de cet article est de présenter des pistes alimentaires qui, activées au sein des exploitations, devraient permettre de réduire les rejets azotés des bovins et de fournir les premiers éléments concernant leur transposition au sein des exploitations agricoles. Les ruminants ont la capacité de digérer les hydrates de carbone de structure des végétaux et de produire de la viande et du lait pour la consommation humaine. Au niveau des cellules animales, les acides aminés sont indispensables pour assurer l’entretien et les productions. Ces acides aminés sont issus de la digestion intestinale des protéines microbiennes et des protéines alimentaires non dégradées dans le rumen. L’efficience azotée des ruminants est classiquement faible et très variable. L’excrétion d’azote dépend essentiellement de la quantité d’azoté ingérée et de la productivité animale. La connaissance des mécanismes de la digestion et du métabolisme azoté permet de tendre vers une efficience azotée grandissante. Les facteurs clés reposent sur l’utilisation dans le rumen de l’azote, la dégradation dans le rumen des protéines alimentaires selon la ration et le fourrage, le contrôle des micro-organismes responsables de la dégradation des protéines alimentaires et la formulation adéquate des rations évitant les excès de protéines par rapport aux besoins des animaux. L’efficience azotée est de plus très dépendante des apports énergétiques à la fois au niveau du rumen et des cellules animales des ruminants. Le métabolisme azoté au sein du rumen est considéré comme crucial pour moduler l’efficience azotée des ruminants et est en partie fonction des conditions propres à chaque exploitation agricole. http://hdl.handle.net/2268/147679 Title: Myeloperoxidase activity decreases in equine semen freezing extenders <br/> <br/>Author, co-author: Ponthier, Jérôme; Franck, Thierry; Niesten, Ariane; Parrilla Hernandez, Sonia; Serteyn, Didier; Deleuze, Stefan <br/> <br/>Abstract: Myeloperoxidase (MPO) is a pro-oxidant enzyme contained in and released by neutrophils, and associated with decreased post-thaw motility of equine semen. This study aimed to compare MPO activity in pure equine freezing extender, raw and post-thaw semen. Active MPO Concentration (AMC) was measured with Specific Immunologic Extraction Followed by Enzymatic Detection in 20 ejaculates. Raw semen intra cellular AMC was determined in the supernatant after membrane lysis, each pellet containing 100x106 spermatozoa. AMC was also assayed in supernatants of semen frozen following a conventional method using INRA FreezeTM (IMV, France). Effect of freezing procedure on AMC was tested by experimentally adding 500ng of purified active MPO (Calbiochem, Germany) in 4 samples either with 5ml of PBS or INRA FreezeTM before assay. AMC was higher in sperm-rich pellet (0.306ng/ml) than in post-thaw semen (0.002ng/ml) (p=0.058). After experimental MPO addition, no activity variation was observed during the freezing procedure (after dilution, 1, 2 hours of cooling and post-thawing) within the same medium. Purified MPO activity was decreased in INRA FreezeTM when compared to PBS at all timings of sampling (p=0.0286). When all samples were pooled, remaining activity in INRA FreezeTM was 23.93±13.13%. MPO fixation on large proteins contained in the extender experimentally reduces AMC, as previously observed in plasma. However, AMC decrease observed during semen freezing is more important than after experimental addition. That could be explained by a MPO interaction with seminal plasma, a partial MPO release or a MPO inactivation during equine semen freezing. http://hdl.handle.net/2268/147393 Title: Valorisation de l'épeautre dans l'alimentation des bovins <br/> <br/>Author, co-author: Beckers, Yves http://hdl.handle.net/2268/147389 Title: Les légumineuses comme source protéique dans la ration des ruminants <br/> <br/>Author, co-author: Beckers, Yves http://hdl.handle.net/2268/147388 Title: Quelle place pour la viande rouge dans nos assiettes ? <br/> <br/>Author, co-author: Beckers, Yves http://hdl.handle.net/2268/147190 Title: Production de cobayes de boucherie en RDC: recommandations techniques pour améliorer les systèmes de production <br/> <br/>Author, co-author: Picron, Pascale; Maass, Brigitte; Bindelle, Jérôme http://hdl.handle.net/2268/147188 Title: Le Cobaye: un petit herbivore facile à nourrir dans des petites parcelles <br/> <br/>Author, co-author: Bindelle, Jérôme; Picron, Pascale http://hdl.handle.net/2268/147130 Title: Estimation of dominance variance with sire-dam subclass effects in a crossbred population of pigs <br/> <br/>Author, co-author: Dufrasne, Marie; Jaspart, Véronique; Wavreille, José; Gengler, Nicolas http://hdl.handle.net/2268/146940 Title: Genetic analysis of longitudinal measurements of feed intake in Piétrain sire lines <br/> <br/>Author, co-author: Dufrasne, Marie; Jaspart, Véronique; Wavreille, José; Gengler, Nicolas http://hdl.handle.net/2268/146939 Title: Genetic analysis of pig survival in a crossbred population <br/> <br/>Author, co-author: Dufrasne, Marie; Misztal, Ignacy; Tsuruta, Shogo; Gray, Kent A.; Gengler, Nicolas