Problems of poisoning of farm animals with toxic plants [Conium maculatum, Veratrum album, Datura stramonium, Amaranthus retroflexus]

agentes nocivos alimentation alimentation des animaux animal animal domestique animal feeding animal pour cuirs et peaux animales animales de carne animals artiodactyla artiodactyle bovidae bovide bovin bovine bovines cattle domestic animals envenenamiento facteur nuisible feeding feeding systems ganado ganado bovino grazing injurious factors intoxication livestock mammals meat animals nutrition pastoreo plantas plante plante toxique plants poisoning poisonous plants rumiante ruminant ruminants technique d'alimentation toxicologia toxicologie toxicology unrestricted feeding vertebrados vertebrates vertebre zootechnie zootechny zootecnia