[Multi phase feeding and earth heat exchangers: A combination with many advantages]

acondicionamiento de aire air air conditioning air temperature aire ammonia ammoniac azote cerdo climatisation crude protein engorde engraissement environmental protection fattening feed conversion efficiency feeding level gain de poids ganancia de peso heat exchangers humedad humidity intercambiadores de calor microclima microclimat microclimate nitrogen niveau d'alimentation nivel alimenticio piggeries pocilga pollution by agriculture pollution par l'agriculture porcherie porcin protection de l'environnement proteina bruta swine temperatura del aire ventilation weight gain