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Vitesse de sédimentation de la matière sèche, de l’azote, du phosphore et du potassium des lisiers de porcs

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Poster. La réalisation d’un échantillon de lisier de porc peut poser des difficultés de représentativité compte tenu de sa composition hétérogène. Avant la phase de prélèvement, les éleveurs de porcs brassent le plus souvent leur fosse de stockage. Dans ce cas, l’échantillonnage s’effectue généralement sur la fraction surnageante, parfois un certain temps après l’arrêt du brassage ce qui pourrait entraîner une sous-estimation de leur valeur fertilisante.
PDF icon Vitesse de sédimentation de la matière sèche, de l’azote, du phosphore et du potassium des lisiers de porcs
2009

Volet «Calculateur de la quantité et de la composition des effluents d’élevage »

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visuel d'intervention.

PDF icon 2013levasseur-rmt.pdf
2013

Voluntary feed intake and feeding behaviour of group-housed growing pigs are affected by ambient temperature and body weight

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The effect of ambient temperature on individual feeding behaviour was studied in six groups of Piétrain×Large White barrows. In experiment 1 (two groups), ambient temperature varied in a cyclic way from 22 to 12°C and 12 to 22°C with three or four consecutive days at each of the following temperatures: 22, 19, 16, 14 or 12°C. Similarly, in experiment 2 (two groups), temperature varied from 19 to 29°C and 29 to 19°C with three or four consecutive days at 19, 22, 25, 27 or 29°C. In both experiments, each group was used over two successive cycles with an initial body weight (BW) of 37 kg at cycle 1 (four pigs per group) and 63 kg at cycle 2 (three pigs per group). During experiment 3, groups of four pigs were exposed to varying temperatures over one cycle either as in experiment 1 (one group) or as in experiment 2 (one group); their initial BW was 45 kg. Photoperiod was fixed to 12 h of light. In experiments 1 and 2, neither the daily number of meals (11) nor the rate of feed intake (37 g/min) were affected by temperature. The daily number of meals was lower at cycle 2 (9 vs. 12 at cycle 1 on average) but their size was higher (305 vs. 181 g/meal at cycle 1). The feeding pattern was mainly diurnal (62%). From individual data obtained at each temperature level and each stage of growth in this study (N=296), an equation to predict the voluntary feed intake (VFI) from temperature (T, ranging between 12 and 29°C) and body weight (BW, ranging between 30 and 90 kg) is proposed: VFI (g/d)=−1264+117T−2.40T2+73.6BW−0.26BW2−0.95T×BW (RSD=329). The present relationship indicates that VFI depends on temperature and body weight with a marked negative effect of high ambient temperatures in heavier pigs.

2000

Voyage d'étude ITP et LGPC au Danemark

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Les Livres Généalogiques Porcins Collectifs et l’Institut Technique du Porc ont organisé, en décembre dernier, un voyage d’étude au Danemark auquel ont participé différents représentants des Organisations de Sélection Porcine et des ingénieurs de l’ITP. Ce groupe de dix personnes, férues de génétique porcine, ont pu ainsi avoir en l’espace de quelques jours un aperçu de l’organisation de l’amélioration génétique porcine au Danemark. Les similitudes entre les dispositifs collectifs français et danois de sélection porcine ont conduit à de tels échanges à plusieurs reprises depuis 1990.
PDF icon Voyage d'étude ITP et LGPC au Danemark
1999

Voyage d'étude ITP-LGPC : dix spécialistes découvrent la génétique danoise

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1999

Vrai ou faux porcelets mort-nés : une nouvelle méthode rapide d’évaluation par échographie

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Poster.

FR

Avec 20% de pertes sur nés totaux en moyenne (IFIP-GTTT, 2015), la mortalité excessive des porcelets en maternité reste une préoccupation majeure, tant pour des raisons économiques que sociétales. Les mort-nés représentent en moyenne 36% des pertes, mais cette proportion varie selon les troupeaux et peut être sur- ou sous-estimée de façon importante (Schneider et al., 2002). Or la détermination précise du stade et des causes de mortalité sont essentielles pour identifier les axes de progrès propres à chaque élevage (Robert, 2009). Il s’agit de différencier les mortalités en cours de gestation (momifiés précoces ou tardifs), pendant (« vrais mort-nés ») et après la mise bas (nés vivants ou « faux mort-nés »). Ceci repose sur trois examens rarement réalisés en élevage : des observations externes détaillées, une autopsie et un test de flottaison du poumon. L’étude réalisée a pour objectif d’évaluer l’intérêt d’une méthode alternative rapide basée sur l’échographie du poumon. Afin de préciser les conditions pratiques de sa mise en oeuvre, différents types d’équipements et de conservation des porcelets avant examen sont testés.

ENG

True or false stillborn piglets: a new and rapid ultrasonographic method of evaluation

High rate of pre-weaning mortality (20% of total born) is an important economic and ethical issue in pig farms. Contribution of stillborn piglets is high (36% of total mortality) but variable. This may be attributed to some inaccurate on-farm evaluations, as precise diagnosis requires necropsy (lung flotation test). The aim of this study was to evaluate the accuracy of an alternative on-farm ultrasonographic diagnosis. Measurements were implemented in the IFIP experimental farm on piglets found dead at birth or within 24 h of life (mummies excluded). Thoracic echography was performed with a 5 MHz linear probe before lung flotation test (n = 256 piglets). The same procedures were implemented on different sub-samples of piglets, using a sectorial pregnancy probe (n = 214), after prolonged conservation (4-6 days at 4°C, n = 25) or on frozen-thawed piglets (n = 51). In ‘false stillborn’, ventilation was associated with typical reverberation artifacts, while non-ventilated lungs of ‘true stillborn’ appeared like homogenous hepatized organs. Characterization with the linear probe was in excellent agreement with the flotation test (98 to 100% accuracy) both on fresh and preserved piglets. The sectorial probe was less efficient (time consuming, lower accuracy). Due to its simplicity and moderate cost, this new and rapid method may be of great practical interest both for research and on-farm investigations.

PDF icon Boulot et al., 48es JRP, 2-3 février 2016, Paris, p. 253-254, poster
2016

Vrai ou faux porcelets mort-nés : une nouvelle méthode rapide d’évaluation par échographie

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Poster.

La mortalité élevée des porcelets (>20% de pertes sur nés totaux) reste une préoccupation majeure, en particulier dans les grandes portées.
• Les mort-nés ont une forte contribution (36% des pertes totales), mais la qualité d’enregistrement est variable selon les élevages.
• La détermination précise des mort-nés (autopsies et test de fl ottaison du poumon) est coûteuse et prends du temps.

-> Les « vrais » et « faux » mort-nés peuvent-ils être déterminés plus rapidement par échographie ?

-> Le matériel et la conservation des porcelets permettent-ils des examens en élevage ?

PDF icon poster ifip de Sylviane Boulot et al., 48es JRP, 2-3 février 2016, Paris
2016

Water medication with a dosing pump : motivations, obstacles and use practices

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Poster.

The reliability of water medication with a dosing pump requires appropriate equipment and good use practices. This study aims to assess the situation in 2014 in terms of motivations and use practices of the dosing pump in a sample of equipped farms. It also aims to understand the obstacles in nonequipped farms.

Abstract.

Introduction: While antimicrobial treatments administered via the feed were largely predominant in France 15 years ago, drinking water is becoming the main administration route, as 51% of treatments are found as oral solutions and powders in 2013 against 22% in 1999. Mostly administered by dosing pump, the reliability of these treatments requires adapted material and correct use practices. This study has for objective to describe the motivation and use practices of the dosing pump in a sample of equipped farms in 2014. It also aims to understand the obstacles for non-equipped farms.

Materials and Methods: A phone survey was conducted in a sample of 109 French farms equipped with a dosing pump and 46 farms which were non-equipped.

Results: One of the main reasons cited by 46% of farmers for acquiring a dosing pump is the higher efficiency and the shorter implementation of treatment administered through water over feed. Regarding the use practices, the best applied recommendations are the preparation of the tank solution for a use up to 24 hours (91% of farms) and the complete water rinsing of the circuit at the end of the treatment (90% of farms). In 26% of farms, calculation of the amounts of water drunk by pigs under treatment is relied on the animals’ real level of water consumption based on the reading of the water meter or the graduations on the tank. Other farmers (40%) give an estimate of water drunk from theoretical values (10% of the live weight of animals to treat), which is more approximate because based on a constant set for healthy pigs. And 30% of farmers did not explain how they do the calculation for they work “from habit”. Other recommendations are seldom followed by the surveyed farmers whereas they can prevent treatment under-dosing and clogging of troughs and pipes. Indeed, throughout the past year, the trough flow was never controlled in 53% of farms. Occasional solubilisation problems of the treatment, which occurred in 41% of farms, can be explained by some risky practices: the absence of a mixing tank in 31% of farms, no solubility test for new drugs with water from the farm in 59% of cases, mixing of two drugs in 18 % of farms. Finally, improvements are expected in equipment maintenance which is implemented in less than 25% of farms. For 43% of non-equipped farmers, the main obstacle is the constraint related to equipment: cost, set up, use. Only 11% of non-equipped farmers plan to purchase a dosing pump in the short-term.

Conclusion: This survey helps to better target communication routes to optimise the reliability of treatments administered by a dosing pump, as well as to assist the non-equipped farmers through the acquiring process. 

PDF icon Poster IFIP de Anne Hémonic, 24th International pig veterinary society congress, 7-10 juin 2016, Dublin (Irlande)
2016

Weaning management associated with reproductive performances in French pig farms

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Though multi-factorial determinants of reproductive performances are well established, few studies investigated weaning management at farm levels (1, 2), with more frequent focus on insemination and semen (3).

The aim of this study was to make an inventory of the different weaning practices in farms and to investigate possible relationships with fertility and litter size.

PDF icon boulot-p.669-2014.pdf
2014

Welfare assessment in 82 pigs farms : effect of animal age and floor type on behaviour and injuries in fattening pigs

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welfare assessment method was built, based on criteria related to behaviour, lesion scores and human/animal interactions, and tested thereafter in two main types of farms differing by their type of floor: either concrete, fully or partially slatted (C; n = 42) or straw bedding (S; n = 40). Observations were carried out on 40 to 60 pigs per room for three periods (90, 130 and 162 days of age, respectively, for P1, P2 and P3). Behaviour was assessed through five scans with a two-minute interval between two successive observations.
2009

Welfare assessment of males and females on pig farms

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PDF icon Welfare assessment of males and females on pig farms
2010

Wet scrubber : one way to reduce ammonia and odours emitted by pig units

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With the intensification of European regulation on atmospheric pollution, reduction of ammonia emitted by pig units become a priority for farmers. Conflicts between pig farmers and neighbourhood are generally based on odours emissions. The part of buildings in ammonia produced by pig production is estimated of 60% of the whole ammonia emitted. For odours, this part is around 70%. Sows and the rearing of piglets until 30 kg represent less than 30% of ammonia and around 40% of odours emitted by the building.
PDF icon Wet scrubber : one way to reduce ammonia and odours emitted by pig units
2009

What kind of predictors for calibrating the pig classification methods ?

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Some countries use surrogate predictors for assessing pig classification methods. The french reference method (RMSE = 1.67) is more accurate than all the classification devices used today. But a slight improvement in accuracy and a change in the nature of the measurements on line are expected.
PDF icon What kind of predictors for calibrating the pig classification methods ?
2000

What kind of surrogate predictors can be used for assessing the pig classification methods ?

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2001

What mineral and vitamin levels to recommand in swine diets. Que níveis de vitamina e mineral são recomendados em rações de suínos?

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English

Minerals, including trace-elements, and vitamins are currently introduced into the pig diet in order to obtain suitable performances for the modern pig genotype bred in confinement. Most of the mineral and vitamin contents of cereals and usual protein compounds are characterized by their poor and variable availability. Supplemental diets are then usually needed. This paper, based on literature data, reviews the pig requirement for minerals and vitamins in order to ensure economic and profitable performance. Recent research has focused on phosphorus due to environmental considerations. The widespread use of microbial phytase has decreased the need for inorganic phosphates. Cereals are particularly deficient in calcium and sodium, consequently limestone and salt are necessary to meet the pig need for these minerals. Zinc and copper are recognized as growth promoting agents but their use at high levels is detrimental to the environment. The pig diets usually contain supplemental contents of iron, manganese, cobalt, iodine and selenium. The need for these elements in pig diets is described individually. Vitamin E and choline represent the most expensive vitamins added. Choline is then usually not incorporated into the pig fattening diet taking into account the choline contents of the raw materials, while vitamin E is included at a lower level than those which improve the meat quality. Our recent research has dealt with increased levels of vitamins added in combination, calculating higher requirement of the modern pig genotype. Fewer improvements have been obtained in this way, suggesting that recommendations proposed by INRA in 1984 are mainly justified.

Brasileira

Minerais, inclusive elementos traços, e vitaminas são atualmente adicionados nas rações de suínos objetivando obter performance adequada para genótipos modernos criados em confinamento. A maioria do conteúdo de mineral e vitamina dos cereais e compostos protéicos é caracterizada por sua baixa e variável disponibilidade. Dietas suplementares são então geralmente necessárias. Este artigo, baseado em dados de literatura, revê a exigência do suíno para minerais e vitaminas objetivando assegurar desempenho econômico e rentável. Recente pesquisa tem focado no fósforo devido às considerações ambientais. A propagação do uso de fitase microbial reduziu a necessidade de fosfato inorgânico. Cereais são particularmente deficientes em cálcio e sódio, consequentemente calcário e sal são necessários para atender a necessidade do suíno para estes minerais. Zinco e cobre são reconhecidos como agentes promotores de crescimento, mas sua utilização em elevados níveis são prejudiciais ao meio-ambiente. As rações de suínos geralmente contêm quantidades suplementares de ferro, manganês, cobalto, iodo e selênio. A necessidade para estes elementos nas rações de suínos é descrita individualmente. A vitamina E e a colina são as vitaminas mais caras a serem adicionadas. Consequentemente, a Colina não é incorporada na ração de suínos em terminação, levando-se em conta o conteúdo das matérias-primas, enquanto que a vitamina E é incluída em nível mais baixo do que aqueles que melhoram a qualidade da carne. Nossa pesquisa recente lidou com níveis elevados de vitaminas adicionadas em misturas, calculando exigências mais elevadas dos genótipos suínos modernos. Poucos avanços foram obtidos dessa maneira, sugerindo que as recomendações proposta pelo INRA em 1984 são até hoje justificadas.

2009

XIIth International Society for Animal Hygiene congress, Université d'Agriculture de Varsovie (Pologne) 4-8 Septembre 2005

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Le congrès annuel de l’ISAH s’est déroulé dans l’enceinte de la Faculté des Sciences Animales de l’Université d’Agriculture à Varsovie en Pologne du 04 au 08 septembre 2005.

Une session a été intégralement consacrée à la santé et l’environnement en production porcine avec 10 présentations orales et 9 posters. Quelques éléments sont brièvement rapportés dans cet article.
PDF icon XIIth International Society for Animal Hygiene congress, Université d'Agriculture de Varsovie (Pologne) 4-8 Septembre 2005
2005

Y a-t-il des liens entre les usages d'antibiotiques et les performances technico-économiques ?

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Visuel d'intervention.

PDF icon correge2014c.pdf
2014

Y a-t-il un intérêt économique à alourdir les carcasses ?

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Alourdir davantage les porcs en production conventionnelle ne présente pas aujourd’hui d’intérêt économique majeur, d’autant plus que les cours sont bas et que le prix de l’aliment est en hausse.

Seule l'utilisation de grilles de rémunération adaptées et de primes spécifiques peut permettre de compenser

les surcoûts de l'alourdissement et de dégager une marge notable pour l'éleveur.
PDF icon Y a-t-il un intérêt économique à alourdir les carcasses ?
2004

Y a-t-il un marché pour les porcs dans l'UE ?

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Entre les pays de l'Union Européenne, la commercialisation des porcs charcutiers emprunte des voies diverses. Tour d'horizon.
2010

Y a-t-il une alimentation du porc favorable à la qualité technologique ?

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Une incidence faible de la composition de l’aliment sur la qualité technologique de la viande de porc

  • A l’exception de la glycérine mais disponibilité réduite et variable
  • Pas de MPsc onsidérées comme défavorable

Un effet possible de certains nutriments : Tenir compte des types génétiques (HAL)

Toute contrainte de formulation supplémentaire représente un surcoût potentiel pour le maillon élevage

PDF icon intervention de D Gaudré à la journée Quizz qualité des viandes de janvier 2017
2017

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