[Metabolic parameters, dairy performance and feed intake of German Black Pied and Red Pied cows]

acide gras blut bovin laitier cholesterol colesterol cows dairy cattle energie energy exchange fatty acids feed intake foie ganado de leche gehalt glucosa glucose harnstoff hormon insulin insulina insuline lactation laktation leber liver metabolism metabolisme metabolismo milch milk yield oxidoreductases oxidorreductasas pankreas parameter prise alimentaire (animaux) rendement laitier rendimiento lechero rind stoffwechsel thyroxin thyroxine tiroxina transferasas transferase transferases urea uree vaca vache