References of "Beckers, Yves"
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See detailPrevalence and sources of Campylobacter spp. contamination in free-range broiler production in Belgium
Vandeplas, Sabrina ULg; Dubois Dauphin, Robin ULg; Beckers, Yves ULg et al

in World's Poultry Science Journal (2006), 62(supplément), 557

An one year epidemiological study was carried out between February 2005 and January 2006 in Belgium to assess the Campylobacter prevalence in free-range broiler production. Three successive broiler flocks ... [more ▼]

An one year epidemiological study was carried out between February 2005 and January 2006 in Belgium to assess the Campylobacter prevalence in free-range broiler production. Three successive broiler flocks on 6 belgian farms were investigated for the presence of Campylobacter ssp. during the rearing period. Each flock was visited four times, before and after the outdoor rearing period. During each visit, samples were taken in the broiler houses (litter, cecal droppings, water-lines, feed, entrance premises) as well as from the outer rearing environment (open-air range). Conventional microbiological methods combined with biochemical tests were used for the Campylobacter detection, species identification and isolation. Campylobacter prevalence was very high in free-range broiler production during the experimental period. C. jejuni is the main species isolated from all contaminated samples, while mixed C. jejuni/C. coli infections sometimes occured. Contamination of the broiler flocks was increased in summer/autumn, with a 100% flocks contamination, whereas only 4 (66.7%) and 3 (50%) of the flocks became Campylobacter positive in spring and winter respectively, at the end of the rearing period. Moreover, about 53.8% of contaminated flocks were infected with Campylobacter before chicks have access to the open-air range. In 69.2% of the Campylobacter-positive flocks, the open-air range soil belonged partly of fully to environmental samples found to be Campylobacter-positive before flock infection. The other potential sources of infection were delivery tray, entrance premises floor and water-lines. The access to an open-air range seems to be an important way of contamination of broilers because Campylobacter prevalence in the flocks increased after going out. [less ▲]

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See detailEffect Of Various Levels Of Imbalance Between Energy And Nitrogen Release In The Rumen On Microbial Protein Synthesis And Nitrogen Metabolism In Growing Double-Muscled Belgian Blue Bulls Fed A Corn Silage-Based Diet
Valkeners, Damien; Thewis, André ULg; Amant, Stéphanie et al

in Journal of Animal Science (2006), 84(4), 877-885

Seven double-muscled Belgian Blue bulls (initial BW: 341 ± 21 kg) with cannulas in the rumen and proximal duodenum were used in an incomplete replicated Latin square. The study examined the effect of ... [more ▼]

Seven double-muscled Belgian Blue bulls (initial BW: 341 ± 21 kg) with cannulas in the rumen and proximal duodenum were used in an incomplete replicated Latin square. The study examined the effect of imbalance between energy and N in the rumen on microbial protein synthesis and N metabolism by giving the same diet according to 3 different feeding patterns. The feed ingredients of the diet were separated into 2 groups supplying the same amount of fermentable OM(FOM) but characterized by different levels of ruminally degradable N (RDN). The first group primarily provided energy for the ruminal microbes (12.5 g of RDN/kg of FOM), whereas the second provided greater N (33.3 g of RDN/kg of FOM). These 2 groups were fed to the bulls in different combinations with the aim of creating 3 levels of imbalance (0, 20, and 40 g/ kg of DM) between energy andN supplies in the rumen. Imbalance was measured by the variation of the degradable protein balance (OEB value in the Dutch system) of the diet between the 2 meals each a day. Diurnal variations in ruminal NH3-N concentrations and plasma urea concentrations were greatly influenced by the feeding patterns of the diet. Introduction of imbalance affected neither microbial N flow at the duodenum (P = 0.97) nor efficiency of growth (P = 0.54). The feeding patterns of the diet had no negative impact on NDF degradation in the rumen (P = 0.33). Nitrogen retention was not affected by imbalance (P = 0.74) and reached 49.7, 52.0, and 51.3 g/d, respectively for 0, 20, and 40 g of OEB/kg of DM imbalance. It seems that introduction of an imbalance between energy and N supplies for the ruminal microbes by altering the feeding pattern of the same diet does not negatively influence the microbial activity in the rumen norNretention of the animal. Nitrogen recycling in the rumen plays a major role in regulating the amount of ruminally available N and allows a continuous synchronization of N and energyyielding substrates for the microorganisms in the rumen. Therefore, imbalance between dietary energy and N created over a 24-h interval was not detrimental to rumen microbial growth for the animal as long as the level of imbalance did not exceed 40 g of OEB/kg of DM. Thus, these feeding patterns of the diet can be used under practical feeding conditions with minimal impact on the performance of ruminant animals for meat production. [less ▲]

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See detailUsing lupin seeds to replace soybean meal in pig feed: effect of alpha-galactosidase supplement and lupin variety on nitrogen retention and diet digestibility in pigs.
Froidmont, E.; Wathelet, Bernard ULg; Beckers, Yves ULg et al

in Mexico, where old and new world lupins meet. Proceedings of the 11thInternational Lupin Conference, Guadalajara, Jalisco, Mexico, 4-9 May2005 (2006)

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See detailLa nutrition minérale des bovins, une matière complexe
Beckers, Yves ULg

Article for general public (2005)

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See detailLe culard Blanc Bleu Belge : aspects zootechniques
Beckers, Yves ULg

Scientific conference (2005, June 28)

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See detailEffect of various levels of imbalance between energy and nitrogen supplies in the rumen on nitrogen metabolism in growing double-muscled Belgian Blue bulls fed maize silage based diet.
Valkeners, Damien; Beckers, Yves ULg; Amant, Stéphanie et al

in Proceedings of the British Society of Animal Science annual conference2005, York, UK. 4th-6th April, 2005 (2005, April)

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See detailEffect of ruminal degradable nitrogen deficit on nitrogen metabolism in growing double-muscled Belgian Blue bulls fed maize silage based diet.
Valkeners, Damien; Beckers, Yves ULg; Van Laere, Marc et al

in Proceedings of the British Society of Animal Science annual conference2005, York, UK. 4th-6th April, 2005 (2005, April)

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See detailValorisation du blé fourrager dans l'alimentation du poulet de chair.
Beckers, Yves ULg; Piron, Fabien ULg; Wéry, Olivier et al

Conference given outside the academic context (2005)

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See detailDifférenciation et fonctionnalité des produits agricoles
Rondia, Pierre; Dehareng, Frédérick; Beckers, Yves ULg et al

in CRA-W; FUSAGx (Eds.) 10ème Carrefour des Productions animales : L’élevage : hier, aujourd’hui, demain quelles attentes pour quels enjeux ? (2005, January 26)

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See detailLa diversification en productions animales
Wavreille, José; Rondia, Pierre; Decruyenaere, Virginie et al

in CRA-W; FUSAGx (Eds.) 10ème Carrefour des Productions animales : L’élevage : hier, aujourd’hui, demain quelles attentes pour quels enjeux ? (2005, January 26)

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See detailAlimentation azotée du taurillon Blanc Bleu Belge culard: état des connaissances, nouvelles avancées et perspectives.
Valkeners, Damien; Beckers, Yves ULg; Froidmont, Eric et al

in CRA-W; FUSGAx (Eds.) 10ème Carrefour des Productions animales. L’élevage : hier, aujourd’hui, demain quelles attentes pour quels enjeux ? (2005, January 26)

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See detailIncidence d'una dditif alimentaire contenant les premiers acides aminés limitants sur les performances zootechniques du taurillon BBBc nourri avec de l'ensilage de maïs
Rondia, Pierre; Froidmont, Eric; Decrueyenaere, Virginie et al

in Rencontres autour des Recherches sur les Ruminants (2005), 12

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See detailComparaison de quatre variétés de blé d’hiver : effets de différents critères physico-chimiques sur les performances zootechniques du poulet
Piron, Fabien ULg; Beckers, Yves ULg; Ounissi, Kamel et al

in Journées de la Recherche Avicole (2005)

This study investigated the influence of some physic and chemical parameters of wheat grains on the performances of broilers (Ross). Four varieties (Agami, Corvus, Folio et Meunier) were grown on a single ... [more ▼]

This study investigated the influence of some physic and chemical parameters of wheat grains on the performances of broilers (Ross). Four varieties (Agami, Corvus, Folio et Meunier) were grown on a single site in harvest year 2003. This cultivar samples are ground and included in starter (57.6 % of wheat) and growth diets (61.4 % of wheat). Broiler’s intake was not influenced (p > 0.05, n = 24) by varieties. But weights of chicken (38 days) were (p < 0.05, n = 516) higher with Folio and Meunier. Feed conversion ratios cumulated between day 3 to day 38 (FCR) were (p < 0.05, n = 24) lower with Folio and Meunier than with Corvus and Agami. Hardness was negatively correlated with FCR (r = - 0.60, p < 0.01, n = 4). The correlation between crude proteins and FCR was equal to - 0.70 (p < 0.001, n = 4). FCR was negatively correlated to Zeleny’s index (r = - 0.62, p < 0.01, n = 4), wet (r = - 0.66, p < 0.001, n = 4) and dry gluten (r = - 0.51, p < 0.05, n = 4). FCR was negatively correlated to ratio of large (> 1800 μm) particles in ground wheat (r = - 0.48, p < 0.05, n = 4) and also related to small (< 707 μm) material (r = 0.53, p < 0.01, n = 4). Surprisingly, FCR was negatively correlated with amounts of soluble Non-Starch Polysaccharides and soluble Arabinoxylans. The same pathway was observed with in vitro viscosity data. Intestinal viscosities were not related (p > 0.05, n = 24) to broiler’s performances. [less ▲]

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See detailDes enzymes exogènes pour valoriser davantage le froment chez les volailles et les porcs.
Beckers, Yves ULg; Piron, Fabien ULg; Wéry, Olvier et al

Scientific conference (2005)

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See detailImprovement of lupin seed valorisation by the pig with the addition of alpha-galactosidase in the feed and the choice of a suited variety.
Froidmont, E.; Wathelet, Bernard ULg; Beckers, Yves ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2005), 9(4), 225-235

Three experiments were conducted to assess whether an a-galactosidase supplement improved the utilisation of lupin seeds by growing and finishing pigs and to determine the best lupin variety in presence ... [more ▼]

Three experiments were conducted to assess whether an a-galactosidase supplement improved the utilisation of lupin seeds by growing and finishing pigs and to determine the best lupin variety in presence of a-galactosidase. In experiment 1, three iso-nitrogen (iso-N) and iso-net energy (iso-NE) diets containing 15% of soybean meal (SBM diet) or 20% of lupin seeds (Lupinus albus var. Arès), with or without an a-galactosidase supplement (‘lupin’ and ‘lupin + a-gal’ diets, respectively), were ingested by 12 pigs fitted with a caecal canula, following a completely randomized experimental design. The ileal digestibility of a-galactosides tended to increase with the lupin + a-gal diet. Nitrogen retention of pigs eating the SBM diet was similar to that of those fed with the lupin + a-gal diet and higher than that observed for pigs given the lupin diet. The results suggested that a-galactosides are the main anti-nutritional factors in lupin seeds for pigs. The same diets were investigated in a production trial (experiment 2) involving 48 pigs with a live weight of between 30 and 105 kg. The fattening period was similar for the SBM and lupin + a-gal diets (107 d) and longer for the lupin diet (123 d). With the lupin diet there was a lower average daily gain (ADG, -16%) and a higher food conversion ratio (FCR, + 8%) than with the two other diets. The backfat of pigs fed with lupin-based diets contained fewer polyunsaturated fatty acids (PUFA) and had a lower w6/w3 ratio. In experiment 3, three iso-N and iso-NE diets containing different varieties of lupin (Lupinus albus cv Lublanc and Amiga; Lupinus angustifolius cv Boltensia) and an a-galactosidase supplement were investigated in 12 pigs fitted with a caecal canula, as in Exp. 1. The results showed that the digestible protein supply by the Boltensia diet was higher than in the others. However, the Boltensia variety led to a higher urinary N excretion than the Lublanc variety. The results obtained with Amiga were intermediate. Consequently, the utilisation of ingested and digested proteins was relatively high with the Lublanc diet, intermediate with the Amiga diet and low with the Boltensia diet. The results suggested that the Lublanc variety was better adapted for pig feed that contained an a-galactosidase supplement. [less ▲]

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See detailLa production de viande spécialisée, le culard Blanc Bleu Belge.
Thewis, André ULg; Beckers, Yves ULg

in Thewis, André; Bourbouze, R.; Compère, Roger (Eds.) et al Manuel de Zootechnie comparée Nord-Sud. (2005)

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See detailLupin seeds as a substitute to soybean in broiler chiken feeding : incorporation level and enzyme preparation effects on performances, digestibility and meat composition.
Froidmont, Eric; Beckers, Yves ULg; Dehareng, frédéric et al

in 55th Meeting of European Association of Animal Production (2004, September)

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