Nitrogen balance and apparent digestibility coefficiens of some nutrients in growing pigs fed diets containing a natural zeolite

additif aux aliments des animaux additivi alimentari zootecnici aditivos de piensos alimentation des animaux alimentazione zootecnica animal feeding cerdo contenido de materia seca diet dieta digestibilidad digestibility dry matter content faeces feces feci feed additives heces metabolismo dell'azoto nitrogen content nitrogen metabolism orina porcin swine teneur en azote urina urine zeolitas zeolite zeolites zeoliti