Biotechnology in Animal Husbandry 2009 Volume 25, Issue 3-4, Pages: 221-229
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The effect of genotype and housing system on production results of fattening chickens
Pavlovski Zlatica, Škrbić Z., Lukić M., Petričević V., Trenkovski S.
Investigation was carried out on 500 Arbor Acres and Redbro chickens. First group of 30 male and female chickens per genotype was slaughtered after 12 h period of food deprivation. Second group remained in the facility and was fattened until 50. day. Third group was reared for 50 days but in a semi intensive system, with use of 20 m² and free range area of 1 m²/bird. Nutrition was based on mixture of ground corn, barley, vitamins mineral additive and 30% of complete forage mixture. All chickens, subsequent to finished fattening period (50 days) were weighed and after 12 h food deprivation period were slaughtered. Arbor Acres chickens at the age of 42 days had lower mortality (3.80%), better feed conversion (1.868) and higher realized value of production index (206.73) compared to Redbro chickens. Chickens reared in the facility have realized considerably higher body mass (1820.33 g) compared to free range chickens (1667.50 g). Chickens at the age of 50 days had higher carcass yield compared to chickens at the age of 42 days. Carcass yields 'traditional processing' and 'ready to roast' were considerably higher in chickens at the age of 50 days (83.53 and 76.59) compared to carcass yields of chickens at the age of 42 days (82.61 and 75.68). Chickens reared in the facility (chicken coop) (83.86) had higher carcass yields 'traditional processing' than free range chickens. Other yields in chickens were considerably higher in chickens reared in the facility (76.56 and 67.13) than in free range chickens (75.76 and 65.45). .
Keywords: housing system, genotype, broiler, production traits
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