[Addition of phytase to feeds for broilers improves the bioavailability of macro- and micronutrients]

additif aux aliments des animaux aditivos de piensos aliment pour animaux bioavailability biodisponibilidad broiler chickens disponibilidad de nutrientes feed additives feeds fitasa fitatos fosforo nutrient availability oligoelementos phosphore phosphorus phytase phytate phytates piensos pollo de engorde poulet de chair trace elements