Changes of methaemoglobin levels in the blood of calves in dependence on the ingested amount of nitrates and the transrenal passage of nitrates

agua potable aliment d'allaitement application rates blood calostro calves colostrum cow milk dose d'application drinking water eau potable lait de vache leche de vaca milk replacers nitrate nitrates nitratos nitrite nitrites nitritos orina sang sangre ternero urine veau