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Four environmental chambers housing either 75 (5.5 birds/m") or 37 turkeys (2.8 birds/m ) were used to study the impact of stocking density on air quality, bird health, and performance under similar per bird ventilation rates (3 L/s per bird). Stocking density had little effect on air quality or liveweight gain. The following observations were made for the high and low density stocked chambers, respec tively: respirable dust concentrations were 26 and 24 particles/mL, mean ammonia concentrations were 4 and 4 ppm, mean carbon dioxide levels were 1830 and 1890 ppm, ammonia production was 0.05 and 0.06 L/h per bird, and carbon dioxide production was 9.3 and 8.8 L/h per bird. Lung lesion incidence and severity was not significantly different between stocking densities, although lesion severity tended to increase with increased density. A greater percent age of birds in the high density treatment gasped when the ambient temperature was temporarily elevated (31% high density, 6% low density). Eight, 12 and 16 week body masses and feed:gain were not influenced by density or lesion score.
S.L. Perkins, M.J. Zuidhof, J.J.R. Feddes and F.E. Robinson 1995. EFFECT OF STOCKING DENSITY ON AIR QUALITY AND HEALTH AND PERFORMANCE OF HEAVY TOM TURKEYS. Canadian Agricultural Engineering 37(2):109-112.
Canadian Society for Bioengineering