In situ rumen degradation of dry matter and crude protein in ewes and dairy cows

aliment pour animaux biological differences bovin bovin laitier brebis breed differences cattle concentrates contenido de materia seca corte cows croisement cruzamiento cutting dairy cattle degradation digestion du rumen dry matter content ewes feeding level feeds forraje grosero fourrage grossier ganado bovino ganado de leche niveau d'alimentation nivel alimenticio oveja ovin ovinos piensos piensos concentrados plane of nutrition proteine proteins roughage rumen digestion shearing sheep vaca vache