|
|
Hodnocení výkrmu kuřat s využitím nášlapných vah
Bendeová, Tereza
The aim of the diploma thesis was to evaluate the data gained from a weighine-machine located right in the hall of the selected company. The weighine-machine together with thermometer and hygrometer measures the weight of chickens, numbers of chickens weighed, temperature, humidity and uniformity. The data acquired about the given batches are from September 2014 to March 2016 from both types of hybrids. The results show that hybrid ROSS 308 occurred more often above the growth curve, in summer months it had better daily weight gain and the highest uniformity. Hybrid COBB 500 had better increase in winter and its uniformity was higher in temporary and winter period. According to the correlation analysis, the fact was confirmed, that with the growing weight the number of chickens lowers. The average mortality was around 3 %, the exception was the batch 6/2015 when the mortality was 4,8 %.
|
|
|
Produkce a zpracování drůbeže v české republice
SIAWELA, Saviour
The absolute and most fundamental aim of this bachelor's thesis is to compare and understand the production and processing measures of broiler parent combination and their offspring for the desirable breeding type for commercial breeders of broiler chickens COBB 500 and ROSS 308 in that order. The data was obtained from Mezinárodní testování drůbeže, státní podnik (International poultry testing, state enterprise) in Ústrašice. Parent testing of COBB 500 and ROSS 308 consisted of parent rearing periods of up to 154 days of age respectively. The fattening test was made in two sets of 35 days and 42 days in that order. Testing evidence results suggested that ROSS 308 chickens obtained a quite substantial live body mass/weight compared to COBB 500 on due ending course of the set rearing period in parent testing. However, lower feed consumption per head/day was realized in COBB 500 hybrids with reference to this period respectively. In addition to that, lower feed consumption was observed per day/head in COBB 500 hybrids during the laying period. Despite the deduced observations though, a higher egg number/hen housed was laid by ROSS 308 hens but the live hatched chickens per laying hen were higher in COBB 500 hens. Higher live body mass/weight and lower feed consumption per kg gain hybrids were realized in ROSS 308 at the fattening test period of 35 days of age. On the other hand, roosters of both hybrid combinations COBB 500 and ROSS 308 gained a higher live body mass/weight and lower feed consumption per kg gain. 2.3 % of chickens died during the fattening period in each hybrid combination. Higher carcass yield, breast, and thighs muscle mass were in this work determined in ROSS 308 hybrids. This is because ROSS 308 hybrids successfully attained a higher live body/weight of at least about 14 g during a prolonged fattening testing period of 42 days of age. Higher live body mass/weight however and lower feed consumption was determined in cocks obviously in comparison with hens in both genotypes. In that order,4.6 % of COBB 500 chickens and 5.4 % of ROSS 308 chickens died during the fattening period due to improper ventilation yet a very imperative factor to animal welfare at large. genotypic difference between COBB 500 and ROSS 308 was at 0.2 % in slaughter yield, 7 g in breast mass, and 9 g in thighs weight respectively.
|
|
|
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%).
|
|
|
Vliv různého podílu purpurové pšenice na senzorickou jakost drůbežího masa
Hrabal, Ondřej
The aim of this thesis has been to investigate what impact on sensory meat quality will purple wheat content have in the feed of broiler chicken Cobb 500. The chicken were divided in five groups, while each group was fed with a different purple wheat to control wheat ratio. The consequent sensory analysis of breast and thigh meat samples was carried out in a university sensory laboratory meeting the ISO 8589 requirement. According to the results of the following statistical assessment, both breast and thigh meat samples were judged as possessing better sensory qualities whenever they came from the chicken fed with some purple wheat content. Regarding thigh meat, best results were achieved in a group given 1/3 purple wheat and 2/3 control wheat. For breast meat, it was impossible to indicate the best ratio of wheat types. In general, however, it can also be stated that chicken fed with some purple wheat content reached better results than the control group did.
|
|
|
Hodnocení užitkových vlastností potomstva brojlerových slepic
MASÁROVÁ, Anna
The aim of the diploma thesis was to evaluate the performance of commercial broiler chicken genotypes Ross 308, Cobb 500 and Hubbard F15. Parental test consisted of parent rearing up to the age of 22 weeks, the laying period up to the age of 62 weeks and from fattening progeny tests (lasting for 35 days or else 42 days). Hybrid Ross 308 chickens reached the highest live weight at the end of the rearing period. Hubbard F15 chickens had the lowest feed consumption per head and day and also the lowest mortality rate. Hybrid Hubbard F15 showed the highest number of hatched chickens per 1 laying hen (137.2 pcs), the lowest feed consumption per head and day (149.4 g) and the highest fertility of hatching eggs (9,2 %). Hybrid Ross 308 showed the highest weight of hatching eggs and live weight at the end of the laying period (cockerels 5 029 g, pullets 4 310 g). Cobb 500 cockerels (2 397 g) and Hubbard F 15 pullets (2 145 g) showed the highest live weight during the 35 day fattening period. The highest breast weight was at the hybrid Cobb 500 (516.9 g) and the thighs weight was the highest at Hubbard F15 (511.9 g). The highest carcass yield was observed at hybrid Cobb 500 (76.30%). During the extended fattening period of 42 days had the highest live weight cockerels Ross 308 (3 096 g), Cobb 500 and Hubbard F15 pullets (2 688 g and 2 682 g). The highest breast weight was observed at hybrid Ross 308 (697.0 g) and thighs weight at hybrid Hubbard F15 (707.6 g). The highest carcass yield was at hybrid Hubbard F15 (78.0%).
|
|
|
Porovnání parametrů užitkových vlastností kuřecích hybridů chovaných v odlišných technologiích
JURNÁ, Martina
A total of 169 batches of chicken (almost 4 million pieces) were included in the survey, of which 88 batches were Cobb 500 chicken and 81 batches Ross 308 chickens. The difference in the European Production Efficiency Factor (EPEF) was 30 points in favour of the Ross 308 hybrid when compared with the Cobb 500 hybrid (395 and 365 points respectively, P < 0.05). During the monitored years, the EPEF gradually increased from 357 points in 2014 to 404 points in 2017, i.e. by 47 points (P < 0.05). From the perspective of the hatchery influence (A and B), the Ross 308 hybrid was found have almost identical EPEF (394 and 395 points respectively). The EPEF of the Cobb 500 hybrid was 27 points higher in hatchery B (380 and 353 points respectively, P < 0.05). The dependence of the live weight of the hybrid at slaughter on the age of the parent flock was found to be r = 0.41, i.e. moderate, statistically significant. A higher EPEF was achieved when fattening in green light as compared with white light. For the Cobb 500 hybrid, the difference was only 2 points (367 and 365 points respectively). For Ross 308 hybrid, the difference was higher, 11 points (404 and 393 points respectively). In the high-capacity hall, fattening took longer than in the small-capacity hall. The difference amounted to 0.92 days for the Cobb 500 hybrid (33.66 and 32.74 days respectively) and 0.11 days for the Ross 308 hybrid (33.11 and 33.00 days respectively). The differences in live weight were small, i.e. 0.01 kg for the Cobb 500 hybrid (2.09 and 2.10 kg respectively) and 0.02 kg for the Ross 308 hybrid (2.12 and 2.14 kg respectively), as were the differences in the feed mixture consumption per 1 kg weight gain, i.e. 0.02 kg for the Cobb 500 hybrid (1.57 and 1.59 kg respectively) and 0.03 kg for the Ross 308 hybrid (1.56 and 1.53 kg respectively). Higher mortality was found in the high-capacity hall. It was slightly higher, by 0.06 %, for the Cobb 500 hybrid (3.26 and 3.20 % respectively). For the Ross 308 hybrid, there was a higher difference of 0.72 % (3.46 and 2.74 % respectively). The EPEF was found to be slightly lower in the high-capacity hall compared to the low-capacity hall. The difference amounted to 9 points for the Cobb 500 hybrid (383 and 392 points respectively) and 17 points for the Ross 308 hybrid (395 and 412 points respectively).
|
|
|
Hodnocení výkrmu kuřat s využitím nášlapných vah
Bendeová, Tereza
The aim of the diploma thesis was to evaluate the data gained from a weighine-machine located right in the hall of the selected company. The weighine-machine together with thermometer and hygrometer measures the weight of chickens, numbers of chickens weighed, temperature, humidity and uniformity. The data acquired about the given batches are from September 2014 to March 2016 from both types of hybrids. The results show that hybrid ROSS 308 occurred more often above the growth curve, in summer months it had better daily weight gain and the highest uniformity. Hybrid COBB 500 had better increase in winter and its uniformity was higher in temporary and winter period. According to the correlation analysis, the fact was confirmed, that with the growing weight the number of chickens lowers. The average mortality was around 3 %, the exception was the batch 6/2015 when the mortality was 4,8 %.
|
|
|
Analýza výkrmu vybraných hybridů kuřat
JURNÁ, Martina
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.
|
|
|
Analysi breeding condition in broiler chickens taking into account the microclimatic condition in controlled mode.
SVOBODA, Zdeněk
This thesis is focused on the assessment of production of broiler chickens te. hybrids ROSS and COBB 308 500, in connection with the microclimate conditions in the period from 2011 to 2014. The survey provides calculation of average lengths of broiler fattening, live weight of broiler chickens at the end of the batch, consumption of complete feed mixture for 1 kg of live weight gain, the effectiveness index of fattening, mortality to reproductive breeding age on. The juxtaposition of these zootechnical parameters will be obtained from the company Tagrea s.r.o. with operations in Čekanice near Tabor.
|
|
|
Analysis of production traits in broiler hens and their offspring
FARA, Jiří
The aim of the bachelor thesis was to compare the production traits of parental combination and their progeny of commercial broiler chicken genotypes Cobb 500 and Ross 308. The data was obtained from the International Poultry Testing Station in Ústrašice. Parental test consisted of parent rearing until the age of 154 days, the laying period of 280 days and from four fattening progeny tests (lasting for 35 days or else 42 days). Ross 308 chickens reached the higher live weight compared to Cobb 500 at the end of the rearing period in parental test. The lower feed consumption per head and day had Cobb 500 hybrids during this period. The lower feed consumption per day and per 1 chicken was found in Cobb 500 hybrids in the laying period. The higher eggs number/hen housed was laid by Ross 308 hens. Number of hatched chickens per laying hen was higher in Cobb 500 hens. Higher live weight and lower feed consumption per 1 kilogram gain hybrids was found in Ross 308 at fattening test at 35 days of age. Cockerels of both hybrid combinations reached higher live weight and lower feed consumption per kilogram gain. 2.3 % chickens died during the fattening period in each hybrid combination. The higher carcass yield and breast and thighs muscle weight were determined in Ross 308 hybrids. Ross 308 hybrids achieved higher live weight, only about 14 g at longer fattening test at 42 days of age. Higher live weigh and lower feed consumption was fond out in cockerels in comparison with pullets in both genotypes. 4.6 % Cobb chickens and 5.4 % Ross 308 chickens died during the fattening period (ventilation problems). The difference between genotypes Ross 308 and Cobb 500 was only 0.2 % in carcass yield, 7 g in breast weight and 9 g in thighs weight.
|
guest ::
