Effects of dietary protein levels and urea supplementation on ruminal nitrite accumulation and methemoglobin formation in sheep fed low energy diet

agricultural chemicals aliment pour animaux alimentation alimentation des animaux alimentos para animales anatomia anatomia animal anatomie anatomie animale anatomy animal animal anatomy animal domestique animal feeding animales animales de carne animales laniferos animals appareil digestif artiodactyla artiodactyle body parts bovidae bovide digestive system domestic animals engrais estomac feed supplements feeding feeding systems feeds fertilizantes nitrogenados fertilizers ganado inorganic compounds livestock mammals meat animals nitrite nitrites nitritos nitrogen fertilizers nutrition organic compounds organic nitrogen compounds ovin ovinos partes del cuerpo partie du corps pigment pigmentos pigments produit agrochimique proteine proteins rumen rumiante ruminant ruminants sales salts sel sheep sistema digestivo stomach suplementos alimentarios technique d'alimentation urea uree vertebrados vertebrates vertebre zootechnie zootechny zootecnia