[The importance of energy density and the lysine to energy ratio in piglet diets]

aliment pour animaux besoin nutritionnel cerdo crecimiento croissance energia energie energy energy value engorde engraissement fattening feed conversion efficiency feed intake feeding level feeds gain de poids ganancia de peso growth lisina lysine necesidades de nutrientes niveau d'alimentation nivel alimenticio nutritional requirements piensos piglets porcelet porcin prise alimentaire (animaux) raciones ration rations swine weight gain