References of "Beckers, Yves"
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See detailCarbon balance of an intensive grazed grassland
Jerome, Elisabeth ULg; Beckers, Yves ULg; Bodson, Bernard ULg et al

Poster (2012, April 23)

This work seeks to analyze the C balance of a Belgian grassland grazed by the “Blanc Bleu Belge” breed of cattle. The site is located at Dorinne in the Belgian Condroz (50° 18’ 44’’ N; 4° 58’ 07’’ E; 248 ... [more ▼]

This work seeks to analyze the C balance of a Belgian grassland grazed by the “Blanc Bleu Belge” breed of cattle. The site is located at Dorinne in the Belgian Condroz (50° 18’ 44’’ N; 4° 58’ 07’’ E; 248 m asl.). It is permanent grassland of ca. 4.2 ha with a moderate slope of 1 to 2 %. Homogeneity and topography criteria are met to ensure high quality turbulent flux measurements. The experimental field was equipped with an eddy covariance system. Flux correction, quality control and data gap filling were performed following standardised procedures. This device was completed by a micrometeorological station that measured temperature and humidity respectively in the air and within the soil, radiation, atmospheric pressure and precipitations. Carbon exported through mowing (CNBP,export), imported through compost application (CNBP,import) or through complementary feeds for cattle (CNBP,complement) was also measured. In addition, the vegetation development was followed in order to estimate herbage production and dry matter intake by grazing animals. Carbon lost through CH4 emissions (CNBP,CH4) was finally estimated, allowing the establishment of a full C budget. After one year of measurements (May 2010 - May 2011), the grassland was a net CO2 source (Net Ecosystem Exchange (NEE) = 172 ± 94 g C m-2 year-1). Net Biome Productivity (NBP) was calculated from NEE by taking into account imports and export of organic C and losses of carbon as CH4. Contribution of CNBP,CH4 to NBP was small as it was 12 ± 1 g C m-2 year-1. The balance between CNBP,import and CNBP,export created not such a large departure of NBP from NEE, which is not the case of CNBP,complement. The NBP was finally estimated at 102 ± 95 g C m-2 year-1. At this stage, it is premature to conclude about the sink or source behaviour of the plot because the NBP value is very close to its uncertainty. Moreover, this result was obtained under particular climate conditions, characterised by drought during summer 2010 and spring 2011. First year full carbon budget will be discussed in relation with climate conditions and management practices. A second year of measurements will be also presented. [less ▲]

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See detailLes aspects nutritionnels de la betterave fourragère et son intégration dans les rations
Beckers, Yves ULg

Conference given outside the academic context (2012)

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See detailRation comparée conventionnelle - bio en élevage de bovin viande et lait
Beckers, Yves ULg

Conference given outside the academic context (2012)

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See detailConsommation locale de produits animaux : que produire localement avec nos propres ressources végétales ?
Beckers, Yves ULg; Bodson, Bernard ULg; Vancutsem, Françoise ULg et al

in 17ème Carrefour des productions animales (2012, March 07)

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See detailBiofuel by-product for poultry diets
Hissette, Mathias ULg; Destain, Jacqueline ULg; Thewis, André ULg et al

Poster (2012, February 28)

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See detailQuel maïs servir aux vaches laitières ?
Beckers, Yves ULg

Conference given outside the academic context (2012)

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See detailQuel maïs servir aux vaches laitières ?
Beckers, Yves ULg

Conference given outside the academic context (2012)

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See detailCarbon balance of a grazed grassland in Belgium
Jerome, Elisabeth ULg; Beckers, Yves ULg; Bodson, Bernard ULg et al

in Communications in Agricultural and Applied Biological Sciences (2012, February 10)

This work seeks to analyze the carbon balance of a managed permanent grassland grazed by the “Blanc Bleu Belge” breed of cattle. The study site is located at Dorinne. The experimental field was equipped ... [more ▼]

This work seeks to analyze the carbon balance of a managed permanent grassland grazed by the “Blanc Bleu Belge” breed of cattle. The study site is located at Dorinne. The experimental field was equipped with an eddy covariance system that measured CO2 fluxes and with a micrometeorological station. Carbon exported through mowing, imported through compost application or through complementary feeds for cattle was also measured. Carbon lost through CH4 emissions was finally estimated, allowing the establishment of a full C budget. In addition, the vegetation development was followed in order to estimate herbage production and dry matter intake by grazing animals. First year full carbon budget is presented and discussed, in relation with climate conditions and management practices. [less ▲]

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See detailTrockenstand : kurz vs lang ? Laktation : lang vs kurz ?
Beckers, Yves ULg

Conference given outside the academic context (2012)

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See detailAlimentation et performances. Les femelles de remplacement
Beckers, Yves ULg

Conference given outside the academic context (2012)

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See detailLa production de viande par les bovins
Beckers, Yves ULg

Conference given outside the academic context (2012)

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See detailOptimiser l'usage des fourrages auto-produits et viser l'autonomie protéique
Beckers, Yves ULg

Conference given outside the academic context (2011)

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See detailD31-1254: Influence de l'âge et du poids d'abattage sur la qualité organoleptique du poulet de chair à croissance lente en Région wallonne (Rapport d'activités intermédiaire).
De Maeseneire, Coraline ULg; Beckers, Yves ULg; Thewis, André ULg

Report (2011)

Ces dernières années, la progression de la production avicole en Wallonie est, en grande partie, liée au développement de filières dites de qualité différenciée. En 2009, ce sont près de 2.000.000 de ... [more ▼]

Ces dernières années, la progression de la production avicole en Wallonie est, en grande partie, liée au développement de filières dites de qualité différenciée. En 2009, ce sont près de 2.000.000 de poulets qui ont été associés à ce type de production. Cependant, contrairement au poulet standard pour lesquels les pratiques sont très standardisées, les pratiques d’élevage en qualité différenciée peuvent varier, notamment la génétique, l’âge et le poids à l’abattage, le sexe de l’animal, l’accès à un parcours… Ces variations peuvent influencer l’homogénéité de la qualité organoleptique de la viande de poulet au sein d’une même filière ainsi que la perception (et la confiance) des consommateurs vis-à-vis de la viande des poulets qui en sont issus. L’objectif de ce projet est d’étudier et d’objectiver de manière scientifique la qualité organoleptique de la viande de poulet de chair au sein de trois filières avicoles de qualité différenciée afin de fournir aux détenteurs de ces filières des informations quant aux facteurs susceptibles de modifier la qualité organoleptique de leurs produits ainsi que la perception de ceux-ci par les consommateurs. [less ▲]

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See detailLa production de viande par les bovins
Beckers, Yves ULg

Conference given outside the academic context (2011)

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See detailLa production de viande par les bovins
Beckers, Yves ULg

Conference given outside the academic context (2011)

Detailed reference viewed: 9 (1 ULg)
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See detailUsefulness of a Vancomycin pretreatment when challenging chickens in order to evaluate anti-Salmonella preparations
Marcq, Christopher ULg; Cambier, Carole ULg; Thewis, André ULg et al

in Ceylan, Necmettin; Ciftci, Ibrahim; Adabi, Shahram (Eds.) 18th European Symposium on Poultry Nutrition: Proceedings (2011, October)

For many years, Salmonella infection models have been developed in chickens with the aim to study the effects of prophylactic or therapeutic measures on the colonization of the gut. However, although the ... [more ▼]

For many years, Salmonella infection models have been developed in chickens with the aim to study the effects of prophylactic or therapeutic measures on the colonization of the gut. However, although the literature includes numerous challenge models, few studies investigated the infection rates among the inoculated population. We have implemented an antibiotic pretreatment of the chickens (vancomycin hydrochloride, 25 mg/bird) as an infection promoter. Indeed, vancomycin affects the normal gut microflora and releases sites for Salmonella at the intestinal epithelium. Two experiments were undertaken and a presence/absence cloacal swab method was used to evaluate cecal colonization. In the first experiment, birds were orally inoculated with Salmonella Typhimurium at 21 days of age. Three inoculum doses (3 × 103, 3 × 106, 3 × 109 cfu/bird) and an uninfected control were compared according to whether or not vancomycin had been used. Higher levels of Salmonella colonization (more than 70 %) were achieved in the gut by pretreating birds with vancomycin before inoculation (P < 0.05). In the second experiment, chicks were inoculated at 7 days of age with 108 cfu/bird after a vancomycin pretreatment, leading to an infection rate of 87.5 %. In conclusion, vancomycin promotes efficiently the percentage of colonized birds in the challenged population, with either young animals or olders. [less ▲]

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