[Effect of various vitamin U dosage on meat quality and methylating activity of duckling liver]

additif aux aliments des animaux aditivos de piensos alimentation des animaux animal feeding application rates calidad canard carcass composition composition de la carcasse composition globale dose d'application ducks enzymic activity feed additives foie jeune animal liver meat yield pato proximate composition quality raciones ration rations rendement en viande vitaminas vitamine vitamins young animals