References of "Beckers, Yves"
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See detailAlimentation de la vache laitière : allier productivité, qualité et respect de l'environnement
Beckers, Yves ULg

Conference given outside the academic context (2002)

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See detailLa valorisation des proéagineux et des oléagineux dans l'alimentation à la ferme
Beckers, Yves ULg

Conference (2002, January 25)

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See detailRumen Escape Of Methionine And Lysine Administered Intraruminally To Growing Double-Muscled Belgian Blue Bulls
Froidmont, Eric; Rondia, Pierre; Thewis, André ULg et al

in Reproduction Nutrition Development (2002), 42(6), 537-544

In many dietary conditions, methionine (Met) and lysine (Lys) are the most limiting amino acids (AA) for ruminants. The AA protected from ruminal fermentation are not commercially available, with the ... [more ▼]

In many dietary conditions, methionine (Met) and lysine (Lys) are the most limiting amino acids (AA) for ruminants. The AA protected from ruminal fermentation are not commercially available, with the exception of Met which is not always economical, especially for meat production. This study measured ruminal escape of free Met and Lys supplemented intraruminally to fast growing bulls. Six double-muscled Belgian Blue bulls, fed a high concentrate diet and fitted with a rumen cannula, received free Met (40 g.d–1) and free Lys (60 g.d–1), individually or simultaneously, in a duplicated Latin square design. The mean ruminal escape of Met and Lys reached 37 and 45% respectively, and did not differ if administered separately or together. Plasma Lys and Met concentrations were increased by 504 and 126%, respectively. Substantial proportions of free AA escaped ruminal fermentation and were available for absorption from the small intestine when they were administered at physiologically high levels. [less ▲]

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See detailDetermination Of The Methionine Requirement Of Finishing Double-Muscled Belgian Blue Bulls With A Three-Step Method
Froidmont, Eric; Beckers, Yves ULg; Thewis, André ULg

in Canadian Journal of Animal Science (2002), 82(1), 95-102

A three-step technique was used to determine total amino acids (AA) and the first limiting AA requirements in finishing double-muscled Belgian Blue (dmBB) bulls. In a first experiment, three dmBB bulls ... [more ▼]

A three-step technique was used to determine total amino acids (AA) and the first limiting AA requirements in finishing double-muscled Belgian Blue (dmBB) bulls. In a first experiment, three dmBB bulls (505 ± 21 kg) received a low metabolizable protein diet containing 25% meadow hay and 75% concentrate. Net energy supply was adequate for maximizing daily gains because of continuous infusion of dextrose into the duodenum. The intestinal apparent disappearance of essential AA (EAA) averaged 70.8% and was the lowest for histidine (61.3%) and the highest for arginine (79.9%). In a second experiment, four dmBB bulls (517 ± 16 kg) received the same diet supplemented with duodenal infusion of dextrose and four doses of Na-caseinate (17, 33, 50 and 66% of metabolizable dietary AA) in a 4 × 4 Latin square design. Nitrogen retention for the basal diet alone and the four increasing supplements of Na-caseinate averaged 61, 64, 74, 75 and 78 g d–1, respectively. A supply of 720 g d–1 of metabolizable AA was defined as optimising the N utilization for animal growth. Based on patterns of plasma concentrations, methionine and phenylalanine were probably the limiting AA. In a third experiment, five dmBB bulls (513 ± 60 kg) fed the basal diet received duodenal infusion of dextrose and AA, equivalent to the second dose in exp. 2 except for the supply of metabolizable methionine (12.8, 15.1, 17.6, 20.1, 22.6 and 25.1 g d–1) that varied in a 6 × 6 Latin square design with one missing animal. On the basis of N retention, the metabolizable methionine requirement was estimated to 22.8 g d–1 and corresponded to 360 mg of metabolizable methionine per gram of N retained. [less ▲]

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See detailOptimalisation des apports en acides aminés pour des taurillons BBB en complément à une ration fermière
Beckers, Yves ULg; Froidmont, Eric

Conference (2001, December 12)

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See detailLa valorisation de la betterave fourragère dans l'alimentation de la vache laitière et du bétail à l'engraissement
Beckers, Yves ULg

Conference given outside the academic context (2001)

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See detailEnrichissement en PUFA oméga 3 et CLA des produits des porcs et des volailles: mythe ou réalité.
Rossi, Florence; Beckers, Yves ULg; Wavreille, José et al

Conference given outside the academic context (2001)

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See detailL'alimentation des bovins Blanc Bleu Belge culards
Beckers, Yves ULg

Conference given outside the academic context (2001)

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See detailDésynchronisation des apports énergétiques et azotés et paramètres de la digestion et du métabolisme azoté chez le taurillon Blanc Bleu Belge culard.
Valkeners, Damien; Wouters, A. J.; Thewis, André ULg et al

in 8èmes Rencontres autour de la Recherche sur les Ruminants, Paris, France, 5-6 décembre 2001 (2001)

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See detailLa valorisation de la betterave fourragère dans l'alimentation de la vache laitière et du bétail à l'engraissement
Beckers, Yves ULg

Conference given outside the academic context (2000)

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See detailAlimentation et fertilité en Blanc Bleu Belge
Beckers, Yves ULg

Conference given outside the academic context (2000)

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See detailAlimentation du taurillon Blanc Bleu Belge culard
Beckers, Yves ULg

Conference given outside the academic context (2000)

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See detailUtilisation des fécès en remplacement du jus de rumen pour évaluer la fermentescibilité des aliments.
Ndimubandi, Albéric; Beckers, Yves ULg; Thewis, André ULg et al

in 7èmes Rencontres autour de la Recherche sur les Ruminants, Paris, France, 6-7 décembre 2000 (2000)

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See detailMesure du by-pass ruminal d'un supplément de lysine et de méthionine libres chez le taurillon Blanc Bleu Belge culard.
Froidmont, Eric; Rondia, Pierre; Beckers, Yves ULg et al

in 7èmes Rencontres autour de la Recherche sur les Ruminants, Paris, France, 6-7 décembre 2000 (2000)

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See detailDetermination Of The Methionine Requirement Of Growing Double-Muscled Belgian Blue Bulls With A Three-Step Method
Froidmont, Eric; Beckers, Yves ULg; Thewis, André ULg

in Journal of Animal Science (2000), 78(1), 233-241

The three-step technique was used to determine the requirements of total amino acids (TAA) and the first-limiting amino acid (AA) in growing double- muscled Belgian Blue bulls (BBb). In Exp. 1, three ... [more ▼]

The three-step technique was used to determine the requirements of total amino acids (TAA) and the first-limiting amino acid (AA) in growing double- muscled Belgian Blue bulls (BBb). In Exp. 1, three double-muscled BBb weighing initially 306 ± 28 kg received a basal diet consisting of 30% meadow hay and 70% concentrate that was poor in digestible protein but had adequate NE because of continuous infusion of dextrose into the duodenum. The intestinal apparent digestibility of essential AA (EAA) was defined according to their duodenal and ileal flows. It averaged 72% but varied between 60% for Met and 79% for Arg. In Exp. 2, five double-muscled BBb (334 ± 22 kg) received the same diet supplemented with duodenal infusions of dextrose and four doses of Na-caseinate (28, 56, 84, and 112% of intestinal digestible dietary AA) in a 4 × 4 Latin square design with one additional animal. Nitrogen retention for the basal diet alone and the four increasing supplements of Na-caseinate reached 49, 61, 70, 80, and 86 g/d, respectively. Nitrogen utilization improved from 34.3% without Na-caseinate supplementation to a maximum of 40.6%, with the third dose supplying 788 g/d of apparently digestible AA. Based on patterns of plasma concentrations, Met, Phe, and Arg were probably the limiting AA when animals optimized N utilization. In Exp. 3, six double-muscled BBb (315 ± 25 kg) fed the basal diet received duodenal infusions of dextrose and AA, equivalent to the third dose in Exp. 2, except for digestible Met (9.3, 14.4, 18.4, 22.4, 26.4, and 30.4 g/d) in a 6 × 6 Latin square design. The Met requirement was close to 26.4 g/d on the basis of N retention. [less ▲]

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