[Ad libitum feeding of pregnant sows works, but ...]

cerdas costos costs crude fibre efficiency eficacia energy value feed intake feeding level fibra bruta fibre brute gain de poids ganancia de peso gestation niveau d'alimentation nivel alimenticio performance de reproduction pregnancy prise alimentaire (animaux) raciones ration rations reproductive performance reproductividad restricted feeding sows tejido adiposo tissu adipeux truie unrestricted feeding weight gain