GEOSTATISTIC TO EVALUATE THE ENVIRONMENTAL CONTROL IN DIFFERENT VENTILATION SYSTEMS IN BROILER HOUSES

The ventilation and cooling systems are important to environmental control inside broilers house enabling the bird to express the maximum potential of production. The aim of this study was to evaluate, using geostatistical analysis, the influence of the ventilation system and the different typologies of building in relation to thermal welfare and air quality in broilers house with birds in the final phase. The broiler facilities evaluated were: Blue House - ventilation systems with exhaust fans and nebulizers, Dark House - ventilation systems with exhaust fans and pad cooling and Solid Wall - ventilation systems with exhaust fans and pad cooling. The attributes evaluated were dry bulb temperature, relative humidity, air velocity, concentration of carbon dioxide and ammonia, during the summer time at 2PM on 52 equidistant points inside the building. The data analysis was by statistical and geostatistical. Geostatistical analysis was an efficient tool to evaluate distribution of environmental conditions in the broilers houses and was able to identify the influence of presence or absence of evaporative panel inside conditions.