Milk composition and metabolism of cows selected for high or low milk-fat concentration

alimentation des animaux animal feeding aptitud lechera calidad consommation alimentaire (animaux) consumo de piensos dairy cows digestion du rumen feed consumption glucosa glucose grasa de la leche lactosa lactose milk fat milk performance milk production milk yield quality rendement laitier rendimiento lechero rumen digestion selection suecia sweden vacas lecheras