Mise en œuvre d’un plan d’alimentation élaboré par simulations à partir d’une population virtuelle de porcs pour permettre une maîtrise de la variabilité du poids en fin d’engraissement. - Archive ouverte HAL Accéder directement au contenu
Poster De Conférence Année : 2014

Mise en œuvre d’un plan d’alimentation élaboré par simulations à partir d’une population virtuelle de porcs pour permettre une maîtrise de la variabilité du poids en fin d’engraissement.

Résumé

In a previous study where simulations were performed on a virtual population of 2000 (Large White x Landrace) x (Large White x Piétrain) pigs, it was suggested that a feed restriction could improve the homogeneity of body weight (BW) at first departure (BW1) to the slaughter house. Growth performance obtained with two feeding plans previously tested in silico was compared with results from an in vivo experiment on a batch of pigs of the same crossbreed. Pigs were housed in pens of six pigs of the same sex each (n = 168). They were offered feed ad libitum (AL) or were restricted (RA) with an increase in feed allowance of 27 g/d to a maximum allowance of 2.40 and 2.70 kg/d, for gilts and barrows, respectively. A two-phase feeding strategy was applied, with 0,9 and 0.7 g of digestible lysine per MJ of net energy (NE) in diets provided before or after 65 kg BW (9.75 MJ NE/kg), respectively. Growth was similar to that obtained by simulation. In vivo, BW1 was more homogenous with the restricted feeding plan than with the ad libitum feeding plan (P = 0.02), in association with a more homogenous feed intake per pen. Although competition for feedwas not taken into account in the simulations, in vivo and in silico BW1 coefficients of variation were very similar (AL: 8.8 vs 8.3% / RA: 6.8 vs 5.7%, respectively). This study confirms the relevance of using simulations performed in advance from a virtual population of pigs to predict the average and variability in performance in groups of growing pigs.
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Dates et versions

hal-01210518 , version 1 (02-10-2015)

Identifiants

  • HAL Id : hal-01210518 , version 1
  • PRODINRA : 254366

Citer

Ludovic Brossard, Jaap J. van Milgen, Bertrand Vautier, Nathalie Quiniou. Mise en œuvre d’un plan d’alimentation élaboré par simulations à partir d’une population virtuelle de porcs pour permettre une maîtrise de la variabilité du poids en fin d’engraissement. : Comparaison des performances de croissance in vivo et in silico. 46. Journées de la Recherche Porcine, Feb 2014, Paris, France. IFIP - Institut du Porc, Journées de la Recherche Porcine en France, 46, 2014, Journées de la Recherche Porcine en France. ⟨hal-01210518⟩
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