Influence of the different ratio of calcium and phosphorus in the compound feeds on the productivity of growing and finishing pigs

additif aux aliments des animaux aditivos de piensos calcio calcium carcass composition cerdo composition de la carcasse compound feeds digestibilidad digestibility engorde engraissement fattening feed additives feed conversion efficiency fosforo gain de poids ganancia de peso growth rate nutrientes nutrients phosphore phosphorus piensos compuestos porcin substance nutritive swine taux de croissance weight gain