Testing the influence of higher levels of calcium and phosphourus on the background of two protein levels in the compound feeds for growing and fattening pigs

aliment composé pour animaux calcio calcium carcass composition cerdo chemical composition composición de la canal composición quimica composition chimique composition de la carcasse compound feeds concentrados de proteína concentré de protéine efficacité conversion alimentaire eficiencia de conversión del pienso energy value engorde engraissement fattening feed conversion efficiency feed intake fósforo ingestión de piensos nutrientes nutrients peso phosphore phosphorus piensos compuestos poids porcin prise alimentaire (animaux) protein concentrates raciones ration rations substance nutritive swine valeur énergetique valor energético weight