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Vyhodnocení ukazatelů výkrmnosti krůt ve vybraném chovu
ONDŘEJKOVÁ, Pavlína
The carcass age at the slaughter of turkeys at the end of the monitored period was 109.3 days. The average live weight was 10.09 kg, the average daily gain was 89.5 g. The correlation coefficient between the age at the slaughter and the live weight in turkeys, r = 0.72, was statistically highly significant. The hybrid Converter turkeys reached 0.27 kg higher average live weight and 0.5 g higher average daily gain during the fattening period which was 1.5 days longer in comparison with the BIG hybrid turkeys. The average age of toms at the slaughter was 141.6 days with the average live weight 20.46 kg. The average daily gain was 142.1 g. The correlation coefficient between the age at the slaughter and live weight of toms, r = 0,29, was low, statistically probable significant. The BIG hybrid toms during the 4 days longer fattening period (p < 0,05) reached 0.5 kg (p < 0,05) higher average live weight compared to the Converter hybrid. There was only a slight difference in the average daily gain at both hybrids (142.0 g at the hybrid BIG, 142.1 g at the hybrid Converter). Both hybrids BIG and Converter showed almost the same feed conversion ratio. The hybrid BIG (8.43 %) recorded nearly 2% lower mortality than at the Converter hybrid (10.38%).
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Analýza ukazatelů výkrmnosti u kuřecích hybridů
ČEDÍKOVÁ, Kristýna
The aim of this thesis was to analyse fattening parameters in chicken hybrids at a particular farm. 256 batches (7 836 986 chickens) were included into the study. 56 batches were carried out in years 2016 and 2018. Remaining 48 batches were carried out in years 2017, 2019 and 2020. The Ross hybrid 308 was fattened during all the mentioned years. However, the Cobb 500 hybrid was fattened only in years 2016 (13%), 2018 (25%) and 2019 (29%). Both hybrids showed nearly the same feeding length (Cobb 500 hybrid 0.28 days shorter), live weight (Cobb 500 hybrid 0.03 kg higher) and feed conversion ratio per kg of weight gain (Cobb 500 hybrid 0.02 kg lower). The Cobb 500 hybrid showed 0.52% higher mortality (p < 0.05) and 14.6 points higher efficiency feeding index (EFI), (p < 0.05). The shortest feeding length was in year 2017 (33.15 days) and the longest in year 2016 (p < 0.05). The live weight showed an upward trend from year 2016 (1.98 kg) to 2018 (2.19 kg). However, in years 2019 and 2020 the live weight stagnated on the value of 2.18 kg. The lowest feed mixture consumption per 1 kg of weight gain was in year 2019 (1.47 kg), and the highest in year 2016 (1.61 kg; p < 0.05). The lowest mortality was recorded in 2017 (2,90%) contrary to year 2018 (3,64%). The difference was 0,74% (p < 0.05). The efficiency feeding index (EFI) was growing between years 2016 (353.3 points) to 2019 (431.9 points). Then in year 2020 it dropped to 427.7 points. The dependence between the age of parents in the parent stock and live weight of chickens was moderate (r = 0.38; p < 0,001). Correlation relationship between the live weight of chickens at the age of day 1 and day 33 was medium (r = 0.60; p < 0.001). The lowest mortality rate from all the batches was in the first batch of 2016 (1.31%). On the contrary, the highest mortality rate was recorded during the fourth batch of year 2018 (4,30%).
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