Abstract
Research on the concentrations of pollutant gasses in tropical livestock buildings is needed in order to establish baselines for exposure limits in the context of animal and human welfare in tropica l environments. Concentrations of aerial ammonia NH , nitrous oxide (NO ), flammable gas (methane, CH ), 4 2 4 carbon monoxide (CO), hydrogen sulfide (H S) and sulfur dioxide (SO ) were measured in five intensive layer 2 2 farms located Imo state during the month of August 2002. Data obtained were correlated with poultry house measurements in other to understand rates of increases of these pollutants as a result of changes in poultry house measurements. Overall mean aerial concentration of CO (3.11±0.73 ppm) was highest, followed by the 1.93 ± 0.14 ppm and 1.53 ± 0.71 ppm recorded for CH and H S respectively, while the 0.09 ± 0.19 ppm 4 2 and the 0.14 ± 0.20 recorded for SO and NH respectively were lowest. The range of 3.25 ± 0.7ppm to 2 4 4.0±0.0 ppm of CO obtained in the four pens FA, FB , FB and FC was significantly (P<0.05) higher than those 1 2 of the other pens. Similarly, the 8.3 ± 4.0 ppm H S obtained in FB was significantly higher (P<0.05) than 2 1 those of other pens. Predicted NO gave the highest coefficient of determination (R ) of 0.612, while predicted 2 2
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