Economic evaluation of the rearing of Hisex White and Hisex Brown laying hybrid

age breeds calidad carne de aves checoslovaquia compound feeds consommation alimentaire (animaux) consumo de piensos costos costs czechoslovakia edad eggs feed consumption feed conversion efficiency gallina ponedora ganancias huevos layer chickens laying performance mortalidad mortalite mortality oeuf performance de ponte peso piensos compuestos poids poule pondeuse poultry meat precios prices prix profit quality race razas rendimiento en la postura sex sexe sexo viande de volaille weight zootechnie zootechny zootecnia