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Effect of diurnally fluctuating high temperatures on performance and feeding behaviour of multiparous lactating sows

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Forty-two multiparous Large White sows were used to investigate the effect of diurnally fluctuating temperature (T) on lactation performance and feeding behaviour. The animals were allocated to one of the four thermic treatments: constant T at 25°C (25C) and 29°C (29C) or equal-mean diurnal cyclic T varying from 21 to 29°C (25V) and from 25 to 33°C (29V). Photoperiod was fixed to 14 h of light. The sows were given food ad libitum between the 7th and the 19th day post partum. Lactation performance was measured for all sows whereas the feeding behaviour was recorded only on 28 sows.
2000

Effect of feed presentation on growth performance of entire male pig and boar taint risk

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The aim of the trial was to compare the performance and boar taint risk when entire male pigs (40 per treatment) wrer fed xwith diets presented as mash (M) or ground pellets (G) over the 22-109 BW range. A liquid feeding system that allows for a simultaneous feeding was usd to control the daily feed allowance per pen (5 pigs/ pen) that corresponded to 4.5% of the initial BW per pen on the first dazy, thereafter + 25 g/d/pig up to 2.60 kg/d. Dietary nutrient contents were calculated from chemical characteristics of ingredients and coressponding nutritional values assessed fro mwww.evapig.com. The growing (<65 kg BW) and the finishing diets were formulated to contain 159 and 152 g/kg of crude protein, 9.2 and 8.2 g/kg of digstible lysine, 157 and 145 g/kg of total dietary fiber. The calculated net energy content was fixed at 9.64 MJ/kg. The daily feed intake tended to be lower with pellets (G : 195, M: 1.98 kg/d, P=0,06). As the average daily gain averaged 882 g/d (P=0.99), the feed conversion ratio was lower with pellets (G: 2,20, M: 2.26, P=0.05). No differences were noticed in carcass characteristics. Proportion of pigs with a low androstenone lever (<1 µg/g pure fat) averaged 96% for both groups. Less pigs presented a skatole level above the minimum detectable concentration (MDC, 30 ng/g) with pellets (G: 78, M: 97%, P=0.01) and their skatole concentration tended to be reduced (G: 64, M: 94 ng/g, P=0.07). When both skatole (S) and indol (I) levels were above MDC, the ratio S/I+S was significantly lower with pellets (G: 51, M: 61%, P=0.01), bu(t the coefficient of correlation betwwen S and S/I+S was similar for both treatments (r=0.78). The improved feed conversion ratio associated with a stable carcass composition at slaughter would result from an increased digestibility of nutrients induced by the technologies used in the pelleting process, which would contribute to reduce boar taint risk in entire male pigs.

2014

Effect of feed restriction on the performance and behaviour of pigs immunologically castrated with Improvac®

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For centuries, entire male pigs have been castrated to reduce the risk of boar taint. However, physical castration of pig is increasingly being questioned with regard to animal welfare considerations. Immunization against gonadotrophin releasing hormone (GnRH) provides an alternative to physical castration. Using the currently available commercial product (Improvac®; Pfizer Animal Health), a two-dose regimen of a GnRH vaccine is administered.
2012

Effect of K-diformate in fattening diets on Salmonella carriage in high prevalence pig herds

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PDF icon ipvs2010correge.pdf
2010

Effect of parity and number of suckling piglets on milk production of sows

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Different factors are known to affect milk production in sows, especially sow parity and litter size (LS). In practice, milk production can be estimated from litter growth rate and LS. This approach is generally used for the determination of nutrient requirements. But information on factors affecting litter performance is scarce. Data from about 3 500 litters from three experimental units were used to quantify the effect of LS and parity on milk production estimated from piglet growth rate. On average, milk production reached 10.7 kg/day which is higher than most published results.
PDF icon Effect of parity and number of suckling piglets on milk production of sows
2012

Effect of the dietary net energy concentration on feed intake and performance of growing-finishing pigs housed individually

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The effect of dietary NE content on feed intake and performance of pigs was investigated using crossbred barrows with initial and final BW of approximately 35 and 110 kg, respectively. Pigs were housed individually and allowed ad libitum access to feed. Pigs were randomly allotted to 6 wheat and soybean meal-based diets (8.1, 8.7, 9.3, 9.9, 10.5, and 11.1 MJ NE/kg) with 16 pigs/diet. Ratios between standardized ileal digestible AA and NE were similar in all diets.
2012

Effects of a short exposure period to deoxynivalenol (DON) contaminated wheat on health parameters and post weaning and fattening performances of pigs

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Poster. The contamination of feed with the Fusarium toxin deoxynivalenol (DON) decreases feed intake and daily gain of pigs but also affects their immune response. An experiment was conducted to evaluate the effects of a brief contamination of post-weaning feed with DON on performance and health condition during post-weaning and fattening periods.
PDF icon Effects of a short exposure period to deoxynivalenol (DON) contaminated wheat on health parameters and post weaning and fattening performances of pigs
2011

Effects of exposure to high ambient temperature and dietary protein level on performance of multiparous lactating sows

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Fifty-nine multiparous Large White x Landrace sows were used to determine the effects of high ambient temperature and level of dietary heat increment on lactation and reproductive performance. During a 28-d lactation and the 14-d postweaning period, ambient temperature was maintained constant at 20 or 29 degrees C.
2001

Effects of glucosinolates and fibre resulting from rapeseed meal inclusion in phase 2 diet on piglet feeding behaviour and performance

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Poster. Glucosinolates (GSL) and fibre from rapeseed may play a key role in the palatability of rapeseed meal (RSM) for pigs. Therefore, a high RSM inclusion in pig diets could lead to a lower feed intake or modify feeding behaviour, especially when competition is high. Two experiments were conducted to evaluate the eff ects of GSL and fi bre resulting from RSM, and of the competition degree at feeding, on feed intake and performance of piglets during the post-weaning period from 12 to 30 kg (phase 2).
PDF icon Effects of glucosinolates and fibre resulting from rapeseed meal inclusion in phase 2 diet on piglet feeding behaviour and performance
2011

Effects of increasing the farm produced content in organic feeds on pig performances

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In three experimental facilities (Exp.1, 2 and 3), two organic diets, one complex including processed feedstuffs as wheat bran and heat-treated soya beans (control), the other simplified and containing over 80% of cereal and pulses (CP), were compared for growing-finishing pigs. The base components of the CP diets were moist maize grain, wheat and faba beans in Exp.1, triticale plus coloured-flowered peas in Exp.2, and triticale, oats, white-flowered peas and faba beans in Exp.3. The control and CP diets were formulated with 0.75 g ileal digestible lysine per MJ NE.
PDF icon Effects of increasing the farm produced content in organic feeds on pig performances
2009

Effects of the diet form on health and performance of weaning or fattening pigs

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visuel de Eric Royer et al., présenté aux 66e EAAP, Varsovie, Pologne, le 31 août-04 septembre 2015, session 14 : customized nutrition taking into account the health status of farms and individual animals, 11 pages

Four experiments were carried out to study the effect of dietary presentation on pigs. In a postweaning study, meal and pellets were compared in either good or bad sanitary conditions (Exp. 1, 14 pens/treatment). Over 41 days after weaning, pigs were offered ad libitum a phase 1 then a phase 2 diet in a dry feeder. The meal form increased DF1 (+6%, P<0.01) but reduced ADG (-4%, P<0.05), then increased FCR (+10%, P<0.01). Meal improved the faecal consistency at d 20 (+8%, P<0.05), but no differences were observed between treatments at d 5, 12 and 26. No interaction between presentation and sanitary conditions was found. In the fattening periods, diet was presented either as meal or ground pellets and delivered restrictively using a liquid feeding system to gilts and barrows (Exp. 2, 16 pens/treatment) or boars (Exp. 3, 8 pens/treatment). In Exp. 2 DFI averaged 2.13 kg for both presentations , but FCR (-5%, P<0.05), carcass yield (+1%, P<0.01) and carcass leanness (+0.4%, P=0.09) were (or tended to be) improved with pellets. In Exp. 3, the tendency for a lower DFI with pellets (-2%, P=0.06) without any difference in ADG resulted in a reduction in FCR (-3%, P=0.05). With pellets, fewer pigs presented a skatole level above the minimum detectable concentration in liquid fat (P=0.01). In Exp. 4 (32 pens/treatment), meal and pellets supplied in dry feeders and meal mixed with water in the trough were given to fatteners, either under restricted or ad libitum feeding conditions. The DFI was higher with liquid meal than with the other forms (P<0.01). During the growing phase, the highest ADG was found with pellets and the lowest with liquid meal, whereas during the finishing period ADG was higher with liquid meal and pellets than with dry meal. The FCR was 4 and 7% lower with pellets than with dry and wet meal, respectively (P<0.01). The improved FCR observed in Exp. 1 to 4 with pellets, compared with dry or wet meal, could be attributed to the increased digestibility of nutrients induced by technology used for diet preparation.

PDF icon Eric Royer et al., 66th EAAP, Varsovie, Pologne, le 31 août-04 septembre 2015, 11 pages
2016

Effects of the trypsin inhibitor concentration in pig fattening diets on performance, health and carcass parameters

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Poster.

Protease inhibitors form complexes with trypsin and chymotrypsin, leading to a lower protein digestibility. However, pig tolerance for moderate dietary levels needs more assessment. Raw soybeans of three varieties (Baya, Isidor and Ecudor) differing in trypsin inhibitor content were substituted to extruded soybeans on a weight basis, to compare increasing concentrations of trypsin inhibitors in fattening diets averaging 0.8, 1.4, 2.1, 3.2 and 3.4 trypsin inhibitor units (TIU)/mg in Exp.1, and 0.8, 1.7, 2.1, 2.6, 4.4 and 5.3 TIU/mg in Exp.2. A total of 310 (LWxLd)xPP pigs (29.4 ±2.5 kg) were fed ad libitum up to 2.65 kg/d for females and 2.85 kg/d for barrows. No diarrhoea was observed and individual faecal scoring was similar among treatments. However, pen scoring showed a tendency for higher consistency in droppings with the 0.8 TIU diet at d 23 (P=0.08) and 30 (P=0.11) in Exp.1. During the growing period, feed intake was unaffected by treatments in Exp.1 but was decreased by 4.4 and 5.3 TIU diets in Exp.2 (P=0.03). Pigs offered 3.2 and 3.4 TIU/mg in Exp.1 had a decrease in daily gain by 11 and 13%, respectively (P=0.04), and an 8% increase in feed/gain (P<0.001). Similarly, 4.4 and 5.3 TIU diets affected daily gain (-15% and -9%, P=0.01) and feed/gain (+6% and +5%, P=0.02) in Exp.2. Nevertheless, performances were not significantly modified during the finishing period of both Exp.1 and Exp.2. Therefore, fattening pigs should not received more than 3.0 TIU/mg, although some compensatory mechanisms may occur over a length of time.

PDF icon Poster IFIP d'Eric Royer et al.
2015

Effects of the water-feed ration and of a rheological sepiolite on some physical parameters of liquid feed and performances of pigs

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This study evaluated the effects of the water-feed ratio (WFR) and of a rheological sepiolite (Splf, Tolsa SA) on physical parameters of the liquid diet, reliability of liquid feeding systems and performances in growing-finishing units. In exp.1 (23 to 115 kg), 48 pigs per group received ad lib a diet mixed with water in a ratio of 2.8:1 l/kg, or the same diet with 1 % Splf at 2.8:1 or 2.2:1 l/kg. In exp.2 (27 to 69 kg), 36 pigs per group were fed ad lib in a 2x2 factorial study: inclusion or not of 1% Splf and WFR (2.7:1 or 2.35:1 l/kg).
PDF icon Effects of the water-feed ration and of a rheological sepiolite on some physical parameters of liquid feed and performances of pigs
2007

Effet de l'acidification de l'aliment d'engraissement sur la séroprévalence dans des élevages à prévalence en salmonelles élevée

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Poster. La maîtrise des salmonelles dans la filière porcine passe par la mise en place d’actions préventives tout au long de la chaîne alimentaire. En particulier, la réduction du portage par les porcs est un des moyens permettant de diminuer l’incidence des salmonelles à l’abattoir. La prévalence en salmonelles varie selon les élevages et plusieurs facteurs associés à une forte prévalence, principalement liés à la biosécurité et à la conduite d’élevage, sont identifiés.
PDF icon Effet de l'acidification de l'aliment d'engraissement sur la séroprévalence dans des élevages à prévalence en salmonelles élevée
2010

Effet de l'apport de dextrose avant l'insémination et d'arginine pendant le dernier tiers de gestation sur l'hétérogénéité du poids des porcelets

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La mortalité des porcelets avant le sevrage est en partie liée à l'hétérogénéité du poids de naissance intra-portée. Notre étude évalue l'effet de stratégies alimentaires portant sur le dextrose et la L-arginine sur l'hétérogénéité de la portée à la naissance. Dans l'essai 1, trois traitements ont été comparés qui consistaient en une supplémentation de 190 g/j de dextrose pendant la semaine précédant l'insémination et de 25,5 g/j de L-arginine du 77ème jour de gestation jusqu’à la mise bas (lot DEXA, n = 26), une supplémentation de L-arginine en fin de gestation (lot ARGI, n = 24), ou aucune supplémentation (lot TEM, n = 23). Les traitements n'influencent ni le nombre ni le poids des porcelets nés totaux (NT) ou nés vivants (NV). Le coefficient de variation (CVPV) du poids de naissance intra-portée est réduit dans les lots ARGI et DEXA comparativement au lot TEM (respectivement sur NT : 21,7, 23,1 et 25,9%, P = 0,06 ; sur NV : 21,0, 22,2 et 25,6%, P = 0,03). Les performances des porcelets pendant la lactation ne diffèrent pas entre traitements. Dans l'essai 2, conduit dans un autre élevage expérimental avec différents modes de logements, seuls les traitements TEM et ARGI ont été comparés. L'effet positif de l'apport de L-arginine n’a pas été observé (CVPV de 20,7 et 21,8% respectivement pour ARGI, n = 16, et TEM, n = 13). L'impact de la supplémentation en L-arginine sur l’hétérogénéité des portées à la naissance pourrait dépendre des élevages et de la conduite des truies.

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2013

Effet de l'enrichissement des aliments de gestation-lactation avec 1,4% en lipides provenant d'huile de palme ou de graine de lin extrudée sur le déroulement des mises bas et la survie des porcelets

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Poster. L’apport de lipides dans l’aliment alloué à la truie pendant la gestation peut contribuer à améliorer la vitalité des porcelets issus de l’hyperprolificité (Quiniou et al., 2008), de façon plus ou moins marquée selon le profil en acides gras (AG).
PDF icon Effet de l'enrichissement des aliments de gestation-lactation avec 1,4% en lipides provenant d'huile de palme ou de graine de lin extrudée sur le déroulement des mises bas et la survie des porcelets
2010

Effet de l'incorporation de l'aliment sous forme de farine ou de miette dans la soupe sur les performances du porc en croissance et ses caractéristiques de carcasse

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La technologie appliquée pendant la granulation permet d'améliorer la digestibilité des nutriments. Les facteurs impliqués sont nombreux, parmi lesquels le choix des matières premières (Noblet et Champion, 2003), les caractéristiques chimiques (Le Gall et al., 2009) et physiques (Wondra et al., 1995) de l'aliment déterminent l'amplitude de cette amélioration. En l'état des connaissances, l'effet de la technologie n'est cependant pas pris en compte actuellement dans les tables de valeurs nutritionnelles des matières premières.

PDF icon jrp-2013-genetique09.pdf
2013

Effet de l'incorporation de l'aliment sous forme de farine ou de miette dans la soupe sur les performances du porc en croissance et ses caractéristiques de carcasse

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Poster. De nombreux essais ont été réalisés en conditions dfalimentation libérale pour comparer les performances obtenues avec du granulé ou de la farine native, rares sont ceux obtenus en alimentation rationnée. Dans cet essai, les porcs sont rationnés et alimentés avec de la soupe fabriquée à partir de farine ou de miettes (granulés écrasés).

PDF icon Effet de l'incorporation de l'aliment sous forme de farine ou de miette dans la soupe sur les performances du porc en croissance et ses caractéristiques de carcasse
2013

Effet de la consommation d'aliment 1er âge sur les performances du porcelet en post-sevrage

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Cet essai conduit à la station de Romillé a eu pour but de comparer les performances

zootechniques en post-sevrage, de porcelets recevant des quantités variables d’aliment

premier âge. On constate une amélioration de la croissance des porcelets avec l’augmentation de la quantité d’aliment

premier âge distribuée.

L’homogénéité des porcelets paraît améliorée ainsi que l’indice de consommation.

L’intérêt économique est discuté mais il est essentiellement lié à la façon dont se répercute en fin d’engraissement, le gain de
PDF icon Effet de la consommation d'aliment 1er âge sur les performances du porcelet en post-sevrage
2001

Effet de la présence de cadmium ou de plomb dans l'alimentation du porc sur les teneurs dans les tissus comestibles

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Le cadmium (Cd) et le plomb (Pb) sont des contaminants présents dans l’environnement, naturellement et à la suite des activités humaines. Leur présence dans l’alimentation du bétail, lorsqu’elle survient, entraine principalement une accumulation dans les reins et les foies des animaux. Aussi, bien que les teneurs dans les produits carnés soient généralement bien en dessous des limites réglementaires, les organes comestibles du porc contribuent à l’exposition totale chez l’homme (EFSA, 2009, 2010).
PDF icon Effet de la présence de cadmium ou de plomb dans l'alimentation du porc sur les teneurs dans les tissus comestibles
2010

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