Analýza výkrmu vybraných hybridů kuřat

The experiment consisted of 78 production batches of broiler chicken out of which 52 production batches were hybrid chickens Cobb 500 and 26 production batches were Ross 308. During 13 production batches was used green lighting for the feeding regimen and during 65 batches was used white light. The broilers were slaughtered at the age of 32.96 days. The Ross 308 hybrid (2.13 kg) reached 0.09 kg higher live weight compared to hybrid Cobb 500 (2.04 kg). In the case of Ross 308 there was 0.03 kg lower feed consumption (1.66, resp. 1.69 kg) and 0.15% lower mortality (3.54, resp. 3.68%). The difference in the index of European Efficiency Factor was 23 points in favour of Ross 308 (376, resp. 353 points). The mean length of production batch with green lighting was 0.54 day shorter (32.51, resp. 33.05 days). The difference in live weight was very small in production batches with different lighting colour regimes (0.05 kg). The difference in feed consumption per 1 kg of weight gain was 0.06 kg in favour of broilers fattening while using green light. Mortality rate of broilers was 0.3% lower when fattening while using white light. The European Efficiency Factor was 9 points higher while fattening using green light. The correlation of live weight of broiler at slaughter with the age of breeding flock was r = 0.42, moderate, statistically highly significant