Adjustment of the energy value of feeds in relation to the nutritional level of dairy cows

aliment pour animaux alimenti per gli animali amido digeribile amidon digestible animal needs besoin des animaux besoin nutritionnel carbohidratos carbohydrates carboidrati chemical composition composition chimique composizione chimica dairy cows digestibilidad digestibility digestible starch energy value feeding level feeds glucide livello alimentare mathematical models milk yield modelli matematici necesidades de los animales necesidades de nutrientes niveau d'alimentation nivel alimenticio nutritional requirements piensos reduction rendement laitier rendimiento lechero riduzione rumen rumine vacas lecheras vacche lattifere valore energetico