Abstract
The study was conducted with the purpose of the comparative analysis of production performance and carcass quality of two coloured broiler genotypes of differentiated genetic potential for growth (Redbro and Redbro Naked Neck) in conditions of intensive feeding, as well as determining the effect of housing system (free range and poultry house) on fattening performance of Redbro broilers. Production performance is presented in the two control periods (days 42 and 84). Carcass quality was analysed at 84 days old broilers based on carcass conformation, yield, share of valuable parts and abdominal fat content. Redbro and Redbro Naked Neck broilers had different growth intensity according to the phases of the experiment, but at the age of 84 days, their body weight did not differ significantly (3382.44g to 3236.0g). Lower efficiency of food utilization (3.08 kg to 2.79 kg) and improved vitality (100 % vs. 97.33 %) was found in Redbro Naked Neck broilers. In terms of carcass quality, there were no significant differences except in the share of wings. The positive impact of growing Redbro broilers in the poultry house was determined on the body weight (p< 0.05), feed efficiency and broiler mortality, which resulted in higher production index (169.83 vs. 140.37) compared to free range reared Redbro chickens. The differences in carcass quality were determined on the basis of better conformation, a small share of the wings but also lower yields of classically dressed carcasses of broilers Redbro reared in the poultry house.
Highlights
The largest part of the total market oriented production of chicken meat still is in intensive broiler production conditions and in this respect the continuous increase of the genetic potential for growth of fast-growing broiler genotypes is important
The study was conducted with the purpose of the comparative analysis of production performance and carcass quality of two coloured broiler genotypes of differentiated genetic potential for growth (Redbro and Redbro Naked Neck) in conditions of intensive feeding, as well as determining the effect of housing system on fattening performance of Redbro broilers
The positive impact of growing Redbro broilers in the poultry house was determined on the body weight (p< 0.05), feed efficiency and broiler mortality, which resulted in higher production index (169.83 vs. 140.37) compared to free range reared Redbro chickens
Summary
The largest part of the total market oriented production of chicken meat still is in intensive broiler production conditions and in this respect the continuous increase of the genetic potential for growth of fast-growing broiler genotypes is important. Taking into account the results of a survey on consumer willingness to allocate more money for products from nonintensive production systems (Rodić et al, 2003), there is a need to balance between productivity and product quality, and in this regard selection of the appropriate genotype and adjustment of technological process are very important. To this end, a study was performed of the effect of extended fattening of fast growing broiler genotypes in extensive production conditions (BogosavljevićBošković et al, 2007) and an analysis of the production performance of our autochthonous breeds in meat production (Pavlovski et al, 2009a). Owing to the significant development of the part of the world poultry meat market originating from non-intensive housing systems, some breeding companies have created several different genotypes of broilers of slow and moderate growth, i.e. of differentiated genetic potential for growth, with feathers in colour and adapted to different conditions and production targets
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