Additional energy and protein supplementation of dairy cows [Holstein Friesian] in early lactation. Milk yield - metabolic-endocrine status and reproductive performances

aliment pour animaux alimentation des animaux alimentazione zootecnica alimenti per gli animali animal feeding attitudine alla riproduzione contenido de materia seca dairy cows diagnosi di gravidanza diagnostic de gestation diet dieta dry matter content energy value feed conversion efficiency feed intake feeds fertilidad fertilite fertility in vivo experimentation ingestione alimentare (animali) integratori lactation lattazione mejoramiento nutricional metabolism metabolisme metabolismo milk yield nutrient improvement performance de reproduction peso piensos poids pregnancy diagnosis prise alimentaire (animaux) proteine proteins raciones ration rations razioni rendement laitier rendimiento lechero reproductive performance reproductividad sperimentazione in vivo suplementos supplements vacas lecheras vacche lattifere valore energetico weight