BODY MASS AND DYNAMICS OF GROWTH OF BROILER CHICKENS OF DIFFERENT GENOTYPE IN IMPROVED REARING

lower housing density and discontinuous light programme, which at the same time marked the application of moderate photoperiod, had positive effect on realized final body masses of broiler chickens of both investigated genotype, however, exhibited effect was higher in chickens of Cobb genotype, considering that significantly greater body mass was established. Chicken genotype is confirmed as important interactive factor in improved rearing conditions, considering higher average daily gains of Cobb chickens compared to Arbor Acres, also in all weekly investigations. Key words: broilers, genotype, housing density, light programme Introduction and literature review Intensifying of broiler production in the last several decades was conditioned by progress in selection activities, creating of genotypes which would enable higher gains in shorter period of time. Of course, selection progress in broiler production was followed by optimalization of rearin