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See detailDiurnal CO2 flux responses in cultivated savanna in Benin (West Africa)
Ago, Expédit Evariste ULg; Agbossou, Euloge Kossi; Galle, Sylvie et al

Scientific conference (2012, February 08)

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See detailImpact of cultivation practices on soil respiration
Dufranne, Delphine ULg; Vancutsem, Françoise ULg; Bodson, Bernard ULg et al

Poster (2012, February 08)

In addition to its, evident, food supply function, agriculture is subjected to various pressures and has to respond to many challenges like reducing its CO2 emissions, maintaining or improving the soil ... [more ▼]

In addition to its, evident, food supply function, agriculture is subjected to various pressures and has to respond to many challenges like reducing its CO2 emissions, maintaining or improving the soil quality, maintaining productivity, sequestrating of the carbon stock in soil... Cultivation practices are known to induce a modification of soil organic matter quantity, quality and spatial distribution, which may impact dry matter decomposition kinetics. In order to bring answers to these questions, a multidisciplinary project (SOLRESIDUS) was set up by the University of Liege, Gembloux Agro-Bio Tech in collaboration with Walloon Agricultural Research Centre (CRA-W). The aim was to investigate the impact of cultivation practices (tillage and residue restitution) on crop growth, yield and environment, as well as on soil properties and on activities. In the present study, we focused on the impacts on soil CO2 fluxes. The experimental site is situated in Gembloux, in the Belgian loamy region. The plot is divided into 4 latin squares where two tillage modalities (plough after 2 stubble breaking vs only 2 stubble breaking) and two straw management practices (restitution vs. exportation) were compared. For 3 years, soil respiration was measured with automatic and manual dynamic soil chambers. Moreover, soil respiration was measured as well in cropping zone (total respiration) as in root exclusion zones created with root exclusion cylinders (heterotrophic respiration). As first results, we observed: -a significantly higher flux in plots with residue restitution, which is clearly explained by the larger amount of organic carbon prone to decomposition; -a decrease of standardized heterotrophic respiration (linked with residue decomposition) during growing seasons; -no significant differences in soil respiration between tillage modalities after 3 growing seasons. The experiment is still in progress, more years being necessary in order to evaluate the long-term impacts of cultivation practices on soil respiration. [less ▲]

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See detailEnergetic systems evaluation using Life Cycle Assessment
Belboom, Sandra ULg; Léonard, Angélique ULg

Scientific conference (2012, February 08)

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See detailCooccurrences des personnes dans le discours de l'enfant: une approche statistique de la construction de l'identité
Poudat, Céline; Gauthier, Jean-Marie ULg; Boulard, Aurore ULg

Conference (2012, February 08)

L’acquisition de la représentation du temps nous donne, avec le développement du langage, accès à la narrativité. Ces histoires que nous racontons aux enfants leur permettent d’accéder au monde de la ... [more ▼]

L’acquisition de la représentation du temps nous donne, avec le développement du langage, accès à la narrativité. Ces histoires que nous racontons aux enfants leur permettent d’accéder au monde de la signification. Peu à peu l’enfant s’approprie sa propre histoire en même temps qu’il constitue son identité. Le concept de self narrative (Denett, 1991), matérialisé dans le discours par l’utilisation des pronoms personnels, est un premier produit de cette évolution. Il est donc intéressant de connaître la manière dont se construit ce récit qui deviendra autobiographique à l’adolescence. [less ▲]

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See detailActualités du droit des marchés publics
Durviaux, Ann-Lawrence ULg

Conference given outside the academic context (2012)

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See detailStudy of pesticide retention on leaves using high-speed imaging
Massinon, Mathieu ULg; Lebeau, Frédéric ULg

Poster (2012, February 08)

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See detailparticipation politique, diaspora congolaise et transnationalismes
Demart, Sarah ULg; Bodeux, Leila

Conference (2012, February 08)

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See detailInfluence de l'apport de différentes sources lipidiques en fin de gestation sur les résultats techniques des truies allaitantes et de leurs porcelets
Boudry, Christelle ULg; Vanrobays, Marie-Laure ULg; Devos, Sven

in IFIP; INRA (Eds.) 44èmes journées de la Recherche Porcine (2012, February 08)

From day 103 in gestation until farrowing, 4 successive groups of 15 sows received 70 g per day of one of the 3 following oils: 1) coconut oil (CO); 2) fish oil (FO) and 3) shark liver oil (SO). At day ... [more ▼]

From day 103 in gestation until farrowing, 4 successive groups of 15 sows received 70 g per day of one of the 3 following oils: 1) coconut oil (CO); 2) fish oil (FO) and 3) shark liver oil (SO). At day 102 of gestation, at farrowing and at weaning, backfat thickness of the sows was determined. The total number of piglets, the number of piglets born alive, stillborn and dead during the suckling period and the duration of gestation were measured. At birth as well as 24 hours, 14 days and 28 days (weaning) later, the piglets were weighed individually. Colostrum samples were collected at farrowing and 24 hours later for the determination of IgG and IgA contents and the fatty acid profile. Neither performance parameters of the sows nor IgG and IgA concentrations in colostrum were affected by the different dietary treatments. This was probably due to the short duration of trial period in which the oil supplements were administered. However, the colostral fatty acid profiles reflected very well the profiles of the supplemented oils. Furthermore, the different treatments affected the growth performances of the piglets. At weaning, the piglets from the FO treatment were respectively 263 and 329 g heavier than the piglets from the SO and CO treatments (P < 0.05). This corresponded to 4.2 % and 5.8 % increase of the ADG in comparison to the SO and CO treatments, respectively. These results show the importance of the fatty acid composition in colostrum on the performances of piglets and consequently the importance of the feeding of sows at the end of gestation. [less ▲]

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See detailBall milling control: the reconciliation of macroscopic SensoMag® data with microscopic optical information.
Leroy, Sophie ULg; Köttgen, Axel ULg; de Haas, Bernard et al

Poster (2012, February 08)

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See detailDéfinition du profil écologique de l'azobé (Lophira alata Banks ex Gaertn F., Ochnaceae) dans les forêts sempervirentes du Cameroun
Biwole, Achille ULg; Bourland, Nils ULg; Doucet, Jean-Louis ULg

Poster (2012, February 08)

Ekki or L. alata is a commercial timber species in Guinea-Congolian region considered vulnerable (IUCN, 2011). Indeed, its population structure shows a severe lack of regeneration in some rainforests ... [more ▼]

Ekki or L. alata is a commercial timber species in Guinea-Congolian region considered vulnerable (IUCN, 2011). Indeed, its population structure shows a severe lack of regeneration in some rainforests (Palla et al., 2002). Moreover, in logging areas, insufficient knowledge about its ecological profile limits any reliable modeling of population dynamics on a long term. Consequently, original research, to improve its ecological characterization to ensure its sustainable management is conducted in moist evergreen forest in southern Cameroon. First results on population dynamics of this species show, in plots study of recruitment, a population without major deficit regeneration. On its silvicultural ability, although that estimated on plantations on parks under 2 years old, the trends of growth (ca 30 and 0.5 cm / year respectively in height and diameter) and mortality (3, 3% / year) suggest a positive perspective. Current work in relation to other topics of research should provide further insights into its ecological profile in the evergreen forests of Cameroon. [less ▲]

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See detailBruxelles : les défis territoriaux d'une mini-ville mondiale
Halleux, Jean-Marie ULg

Conference given outside the academic context (2012)

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See detailDépenses en viande par les ménages belges en 2008
Ferrandis Vallterra, Salvador ULg; Brostaux, Yves ULg; Claustriaux, Jean-Jacques ULg et al

Speech/Talk (2012)

Analysis of meat expenditure by Belgian households in 2008. Meat expenditure by Belgian households during 2008 is analyzed. Expenditure is extracted from the Belgian Household Budget Survey at the FPS ... [more ▼]

Analysis of meat expenditure by Belgian households in 2008. Meat expenditure by Belgian households during 2008 is analyzed. Expenditure is extracted from the Belgian Household Budget Survey at the FPS Economy, S.M.E.s, Self-employed and Energy. The database also provides sociodemographic information about the households participating in the survey. To explain the observed variability of the meat expenditure based on the explanatory factors available, an analysis of the covariance is performed. The three quantitative factors have a bigger effect on the meat expenditure than the three other qualitative factors. The proportion of meat expenditure variability explained by the explanatory factors of the selected model is 31,41%. [less ▲]

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See detailVers une approche par compétence : le master en logopédie de l’ULg
Maillart, Christelle ULg

Scientific conference (2012, February 07)

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See detailLa nutrition minérale et les carences en oligoéléments
DERMIENCE, Michael ULg

Diverse speeche and writing (2012)

Les populations occidentales actuelles accordent de plus en plus d’importance à leur alimentation. Mais Il ne s’agit plus seulement d’intérêts organoleptiques ou hédonistes. Les consommateurs ... [more ▼]

Les populations occidentales actuelles accordent de plus en plus d’importance à leur alimentation. Mais Il ne s’agit plus seulement d’intérêts organoleptiques ou hédonistes. Les consommateurs d’aujourd’hui sont plus que jamais attentifs au caractère nutritionnel de ce qui se trouve dans leur assiette. Preuve en est le nombre sans cesse croissant d’alicaments et d’allégations nutritionnelles et de santé qui apparaissant sur le marché. Autre exemple, la tendance graduelle de la part des entreprises agro-alimentaires de « décortiquer » un produit en ses différents nutriments essentiels, tels les protéines, les lipides, les sucres ou encore les fibres. Il est aussi de plus en courant d’y associer le pourcentage de l’apport quotidien recommandé contenu dans le produit. De nos jours, même l’importance des vitamines et des minéraux majeurs (Na, Ca, P, etc.) est ancrée dans les mentalités. Il y a cependant une catégorie de nutriments encore quelque peu délaissée : les oligoéléments. Les oligoéléments sont des éléments chimiques présents en très faibles quantités dans l’organisme mais dont le rôle est essentiel. Les plus connus sont l’iode, le fer, le cuivre le zinc ou encore le manganèse. D’autre par contre sont moins connus mais sont tout aussi indispensables (parfois en plus faible quantités encore) comme le molybdène, le nickel, le chrome, le cobalt et beaucoup d’autres. Les rôles de ces éléments sont aussi diverses qu’indispensables et on les retrouves dans des enzymes et cofacteurs (souvent dans le site actif), dans des hormones, mais ils peuvent aussi jouer un rôle structural (exemple du fluor dans l’hydroxyapatite). Parfois il n’y a qu’un pas à franchir entre oligoélément et élément toxique. C’est par exemple le cas de l’aluminium et de l’arsenic, qui sont nécessaires en petites quantités mais peuvent devenir des poisons (mortels) s’ils sont ingérés à plus forte dose. [less ▲]

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See detailLes phobies des aliments d'origine animale sont-elles toujours fondées ?
Marcq, Christopher ULg

Conference given outside the academic context (2012)

Quand les productions animales deviennent positives pour la santé humaine… Vache folle, dioxine, toxi-infections alimentaires, maladies cardiovasculaires… Le secteur de l'élevage est depuis plusieurs ... [more ▼]

Quand les productions animales deviennent positives pour la santé humaine… Vache folle, dioxine, toxi-infections alimentaires, maladies cardiovasculaires… Le secteur de l'élevage est depuis plusieurs années décrié et victime d’une forme de phobie. Mais ces craintes véhiculées par les produits issus de l’élevage sont-elles toujours fondées ? Comment la recherche peut-elle œuvrer pour rendre les produits animaux plus sûrs sur le plan sanitaire ? Nous verrons comment l’œuf de poule, régulièrement associé aux toxi-infections alimentaires, pourrait bien devenir dans le futur un alicament, sérieux allié pour lutter contre les infections animales et humaines. [less ▲]

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

Conference given outside the academic context (2012)

Detailed reference viewed: 18 (3 ULg)