Apparent digestibility and nutritional value of urea or ammonia-solution-treated corn silages for lactating Holstein cows and mature sheep

additif aux aliments des animaux alimentation des animaux alimentos concentrados animal feeding bovin laitier composition concentrates cows dairy cattle digestibilidad digestibility ensilage (produit) ensilaje feed additives feeding level ganado de leche milk production milk yield niveau d'alimentation nivel alimenticio ovin ovinos rendement laitier rendimiento lechero sheep silage urea uree vaca vache zea mays