Comparative Productive Performance of two Broiler Strains in Open Housing System
Abstract
Background: The present study was conducted to compare the growth performance and ultimately to calculate the profitability of the two locally available commercial strains of broiler (Ross 308 and Cobb 500).
Methods: For the purpose of study, 900 number of day-old chicks (DOC) of each strain were purchased from the local market. The birds were reared in conventional broiler house with the provision of standard managemental conditions throughout the experimental period. The parameters recorded on weekly basis were feed intake, body weight gain, feed conversion ratio (FCR) and mortality.
Results: Result shown that the total body weight of Cobb-500 and Ross-308 on 1st week was 207.40±14 gram and 196.00±16 gram respectively and these result represented significant difference of weight gain (P<0.05) on 1st week of experiment among both the strains. From 2nd week of experiment till the last week (5th week) the results shown the total body weight of Cob-500 and Ross-308 as 2180.4±38 gram and 2103.7±36 gram respectively which was non-significantly different (P>0.05) among the strains. Furthermore, significant difference of feed conversion ratio (FCR) was observed (P<0.05) among both the strains but from day 7th till the market age weekly FCR of Cob-500 was significantly higher (P<0.05) than Ross-308. Comparatively high mortality (4.8±0.4%) was noticed in Ross broiler strain than Cobb broiler strain (3.7±0.4%).
Conclusion: It was concluded from the current study that the Cobb-500 is performing better in conventional open housing system at high altitude than Ros-308.
Keywords: Broiler; Cobb-500; Ross-308; Conventional broiler houses; Mortality
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