[The role of vitamins in pig rearing]

acide ascorbique acido ascorbico ascorbic acid besoin nutritionnel biotin biotina biotine carence en vitamine carenze vitaminiche cerdo complexe vitaminique b deficiencia de vitaminas diet dieta integratori necesidades de nutrientes nutritional requirements porcin suini suplementos supplements swine vitamin deficiencies vitamin e vitamina e vitaminas b vitamine del gruppo b vitamine e vitamins b