Rokon Zaman, Syed Sarwar Jahan, Akhtarul Islam, Soshe Ahmed
A total of 135 day old broiler chicks were collected from the purchasing outlets of two (02) different breeding hatcheries in Bangladesh. The chicks were placed in an open shed house and were exposed to two different environmental temperature and humidity in summer season. Chicks as hatched broilers belonging to 3 strains Cobb-500, Hubbard Classic and Arbor Acres, 45 of each strain were reared in summer season; having 135 with 3 replications 15 broilers per pen. Body weight and feed consumption first and second weeks of age were significant differences (P0.05) in body weight and feed consumption among the three broiler strain at third weeks and fourth weeks of age. The feed conversion ratio among the three broiler strain at first and second week of age were significant differences (P<0.05). In second weeks, the significant differences (P<0.05) of mortality were observed in three different broiler strain and dressing percentages were significantly differed (P<0.05) in summer season at the end of fourth weeks of age. It may be concluded that Cobb-500 may perform the best in summer season than in Hubbard Classic and Arbor Acres due to dressing yield. Hubbard Classic of the later two strains may also be recommended for commercial boiler production, but priority may be given to the Cobb-500 strain.
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