Dietary recommendations for replacement heifers

additif aux aliments des animaux aditivos de piensos alimentation des animaux animal feeding besoin nutritionnel cinc cobre copper crecimiento croissance cuivre deficiencia de oligoelementos energia energie energy feed additives fer gain de poids ganancia de peso growth heifers hierro iron magnesio magnesium malnutrition necesidades de nutrientes novilla nutritional requirements oligoelementos proteine proteins selenio selenium suplementos supplements trace element deficiencies trace elements weight gain zinc