Thermal comfort differences in poultry houses and its influence on growth performance of broiler strains
Thermal comfort in three types of open poultry houses with different roofing materials; cadjan, galvanized corrugated metal sheets (GCM), a combination (GCM + cadjan underneath), and a tunnel ventilated closed house was evaluated and growth performances of Cobb 500 and Hubbard F-15 broiler strains under each house type were compared. A total of 1110 unsexed broiler chicks/strain was used. Each experimental unit consisted of 185 birds and each house had four experimental units (2 replicates/strain) while body weight of 60 birds were recorded in closed house. Average body weight, temperature and relative humidity in each house were measured weekly and temperature-humidity index (THI) was calculated. House type and strain effects on THI and growth were compared using ANOVA procedure and DNMRT test (p=0.05). Mean THI was significantly the lowest in closed house (28.47°C), and the lowest in cadjan house (28.94°C) among open houses where it was 29.41 and 29.16°C for GCM and GCM+cadjan, respectively. Consequently, closed house had the highest mean body weight (2.058 kg for Cobb and 2.023 kg for Hubbard), while cadjan house was the second highest (1.982 kg for Cobb and 1.953 kg for Hubbard). Use of cadjan leaves seems effective in reducing THI in tropical open poultry houses.
Perera, W.N.U. and Dematawewa, C.M.B. 2017. Thermal comfort differences in poultry houses and its influence on growth performance of broiler strains. Acta Hort. (ISHS) 1152:415-420
broiler, temperature humidity index, Cobb 500, Hubbard F-15, roofing material