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The Experiment was carried out in the Poultry Farm of the Agricultural Experimental Station, College of Agriculture and Veterinary Medicine, AL-Qassim University, Saudi Arabia. The Experiment utilized a total of 3000 broiler chicken grown over a 42-d period. A factorial experiment of randomized block design (2 replicates x 4 minimum ventilation x 2 sexes) was used. Four minimum ventilation rates were used (0.2, 0.4, 0.6 and 0.8 CFM/Lb of live weight) was used. Individual body weights were recorded at hatch, 4 and 6 weeks of age. Feed and water were supplied ad libitum. Food consumption and mortality rate were recorded on a weekly basis. Ammonia and dust measurements were taken daily at the bird height at two locations in each room. Ventilation system had no significant effect on body weight, feed consumption, ammonia concentrations and inspirable dust concentrations at either 4 or 5 weeks or 6 weeks.

STUDY OF AIR POLLUTANTS, PART (2): EFFECT OF VENTILATION RATES ON AMMONIA AND DUST EMISSIONS INSIDE POULTRY HOUSES