Academic literature on the topic 'Broiler chicken fattening'
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Journal articles on the topic "Broiler chicken fattening"
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Bogosavljevic-Boskovic, S., S. Mitrovic, V. Radovic, and V. Doskovic. "The age and housing system effects on the growth of broilers." Biotehnologija u stocarstvu 23, no. 5-6-1 (2007): 519–25. http://dx.doi.org/10.2298/bah0701519b.
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Bearing in mind certain established European Union regulations on the conventional extensive broiler rearing system as well as poultry breeding specificities of our country, experimental investigations were organized with the aim of making a comparison between broiler growth in two different non-industrial rearing systems. The systems included extensive fattening in a poultry house and free-range rearing. The fattening period in both rearing systems lasted up to the 63rd day of broiler age. During the fattening period chicken growth was controlled by individual chicken weighing on a weekly basis. Based on the research results it was determined that the growth of broilers in both rearing systems was similar up to the 49th day of age. The differences established were small and statistically insignificant (P>0.05). The controls at 56 and 63 days of age showed somewhat higher differences in mean body weights of chicks. The difference determined on the 63rd day was statistically significant (P<0.05). From the results mentioned it could be concluded that the differences in broiler growth between the rearing systems examined increased with the prolongation of the fattening period.
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Skrbic, Zdenka, Z. Pavlovski, and M. Lukic. "The effect of fattening duration in different rearing systems on slaughter traits of broiler chickens of genotype Redbro." Biotehnologija u stocarstvu 23, no. 3-4 (2007): 67–74. http://dx.doi.org/10.2298/bah0704067s.
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Slow growing chickens of genotype Redbro, were reared in two systems in order to determine the effect of duration of fattening on values of slaughter yields/dressing percentages and shares of main carcass parts. Fattening of chickens in chicken coop to age of 84 days had considerable effect on increase of slaughter yields: "Conventional processing"(83.59%), "Ready to roast"(77.22%) and "Ready to grill"(67.17%) compared to 42nd day of age (82.21; 74.87 and 65.42%). Redbro chickens reared on free range had lower body masses compared to chickens reared from chicken coops in all investigated ages. Beside significant increase of body mass, longer fattening period influenced considerably decrease of share of back, pelvic and wings. In both rearing systems, prolonging of fattening had statistically significant effect on increase of share of abdominal fat. .
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Bogosavljevic-Boskovic, Snezana, Zlatica Pavlovski, Milun Petrovic, and Vladimir Doskovic. "Quantitative meat quality parameters of broilers from different rearing systems." Biotehnologija u stocarstvu 20, no. 3-4 (2004): 113–19. http://dx.doi.org/10.2298/bah0404113b.
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Bearing in mind both certain established European Union regulations on the non-industrial poultry meat production and rearing specificities in our conditions, experimental investigations were conducted with the aim of examining the effect of two different rearing systems (outlet fattening and extensive rearing in the chicken-pen) on major quantitative characteristics of dressed broiler carcasses. The initial material used in the experiment consisted of one-day old chickens of the Hybro G strain. Following the 56-day fattening period, the shares of dressed carcasses, slaughter by-products, abdominal fat and basic carcass parts were determined by measuring at the slaughter line. Based upon the data mentioned, major quantitative meat parameters of trial broilers were calculated. The research results analyzed lead to the conclusion that there are no particularly significant differences between the outlet-reared broilers (one chick per square metre of the outlet area) and the extensively reared ones (12 broilers per square metre of the floor area) in terms of major slaughter characteristics.
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Pavlovski, Zlatica, M. Lukic, R. Cmiljanic, and Zdenka Skrbic. "Conformation measures on carcass of chickens." Biotehnologija u stocarstvu 22, no. 3-4 (2006): 83–96. http://dx.doi.org/10.2298/bah0604083p.
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An example of measuring of conformation of chicken carcasses using the method applied in the Institute for Animal husbandry, Belgrade-Zemun is presented in this paper, as well as results of our previous research and more recent comparative investigations of different chicken genotypes used for fattening. In order to determine genetic improvement of hybrid which is used in certain research period in broiler production, we will present results of comparative research of different lines tested in years1983, 1993 and 2004. Investigation of the chicken conformation (with few typical chickens of each sex and hybrids) in broiler tests carried out in the Institute for Animal Husbandry, Belgrade-Zemun in 1981,1993 and 2004, showed that there were no significant differences in conformation between hybrids used in investigation periods in broiler production in our country. If we compare results of investigation obtained during 20 year period (from 1983 to 2004.), we can conclude that genetic-selection research have given considerable contribution to increase of the body mass of chickens, especially of breasts, and of breast angle.
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Kroupa, Leo, Pavel Suchý, Eva Straková, and Ivan Herzig. "Glycerol as source of energy in broiler chicken fattening." Acta Veterinaria Brno 80, no. 2 (2011): 157–64. http://dx.doi.org/10.2754/avb201180020157.
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The objective of this study was to verify the possibility of replacing soybean oil in a diet with glycerol, and investigate the effect of glycerol on performance indicators and health in broiler chickens. The experiment was performed on 122 one-day-old chickens that were divided based on sex into two control groups (30 females and 31 males) and two experimental groups (30 females and 31 males). Half (50%) of the soybean oil in diets used in the experimental groups was replaced with glycerol at a ratio of 1:2. On 15, 32 and 38 day of age chickens of both sexes in the experimental group that were fed with diets containing glycerol showed significantly higher (p ≤ 0.01) mean body weight compared to the control group. At the end of the experiment, the mean weight of chickens in the control group was 2.078 kg, whereas the mean weight of chickens in the experimental group was 2.341 kg. In females, the overall consumption of diets within 38 days of fattening was 3.588 kg in the control group and 4.011 kg in the experimental group, in males, it was 3.915 kg in the control group and 4.366 kg in the experimental group, i.e. it was higher in experimental chickens. Feed conversion in chickens in experimental groups was better, being 1.84 kg in the control group and 1.81 kg in the experimental group in females, and 1.73 kg in the control group and 1.72 kg in the experimental group in males. It follows from our results that the optimum amount of glycerol in feed for poultry is 5%.This study presents an original solution to optimize feed formula by replacing plant oil with glycerol. The results of the study can improve production indicators and economy in broiler fattening.
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Pavlovski, Z., Z. Skrbic, M. Lukic, V. Petricevic, and A. Stanojkovic. "Carcass quality of chickens of different conformation." Biotehnologija u stocarstvu 30, no. 3 (2014): 473–79. http://dx.doi.org/10.2298/bah1403473p.
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The aim of this study was to investigate the effect of conformation of chickens of different genotype on the yield of breast meat. As a typical example of the chickens of very poor conformation pure breed Naked neck chickens were taken, fattened 8 and 10 weeks (groups K8 and K10). As an example of good conformation, an imported hybrid of chickens was taken, known for its broiler qualities and as medium growing hybrid, Red Bro (R). The second experiment included commercial hybrids of fast growth (Ross, Cobb and Hubbard) reared according to all technological standards of intensive fattening until the age of 42 days. The results obtained were contrary to the conclusion obtained a few decades ago, at the beginning of the study the conformation of chicken, by Scots and Darrow (1953), according to which the selection of chickens of heavy type, despite the fact that, to some extent, it had improved meat yield of the breast, did not significantly improve slaughter traits of fattening chickens, confirming that better conformation and higher body weight had a positive impact on improving relative share of breast, i.e. white meat. The results regarding the slaughter traits of chicken genotypes of different conformation suggest that breeding - selection work to improve the conformation of broilers significantly improved slaughter yields and breast meat yield. In this sense, the conformation can be treated as an indicator of the slaughter value of carcasses, rather than an aesthetic category.
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Pavlovski, Z., Z. Skrbic, N. Stanisic, S. Lilic, B. Hengl, M. Lukic, and V. Petricevic. "Differences in fatty acid composition of meat between naked neck and two commercial broiler chicken breeds." Biotehnologija u stocarstvu 29, no. 3 (2013): 467–76. http://dx.doi.org/10.2298/bah1303467p.
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Chicken meat from intensive broiler production have different quality compared with meat from native chicken breeds and chicken from a free range production system. The aim of the present study was to evaluate differences in fatty acids content of meat of Naked Neck chickens rared in free range system and two commercial broiler breeds (Cobb 308 and Hybro G+) reared in conventional production system. The trial involved 100 chickens per group. Fattening period lasted 42 days for conventional system and 84 days for free range system. Breast meat of Naked Neck chicken had statistically more 16:0 content compared with Cobb 308 (p?0.05), where in thigh meat the highest content of 16:0 was determined in Hybro G+ breed. Differences for fatty acids composition of breast meat between breeds were also established for 14:0, 17:0, 18:0, 16:1, 18:1, 18:2, 20:2, 22:1 and 22:5 fatty acid. The Naked Neck group showed the highest (p?0.05) percentage of SFA and the Cobb 308 showed the lowest in breast meat. Thigh SFA were also significantly different (p?0.05) between breeds, where Naked Neck chickens had the lowest and Hybro G+ the highest values. Breast MUFA were higher in Hybro G+ than in Naked Neck or Cobb 308 chickens, and thigh MUFA content had opposite trend and it was the lowest in Hybro G+ chicken. In conclusion, free ranged Naked Neck chickens have been shown to have significant different fatty acid composition compared with broiler chickens reared in conventional system.
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Demchyschyn, O. V., M. D. Kuhtyn, and Yu B. Perkiy. "Assessment of the Quality of Broiler Chicken Meat in case of Feeding the “Aquasan” Acidifier." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 20, no. 88 (November 13, 2018): 85–88. http://dx.doi.org/10.32718/nvlvet8815.
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The acidifying agents are being used more often as an alternative to fodder antibiotics in order to preserve bird’s stock and increase productivity. We created the new liquid acidifier “Aquasan” for broiler chickens on the basis of organic and inorganic acids. The application of various feed additives or drugs to the diet of chickens leads to changes in the chemical composition of meat. The purpose of the paper was to research the slaughter qualities and the chemical composition of broiler chicken meat in case of feeding the stock with the “Aquasan” acidifier. The research was conducted on three groups of chicken broilers of the breed Ross 308 – 50 heads in each group. The first group of chickens was the control one, the second group of chickens was given the acidifier analogue called “FEEDACID MAX L”, and the third group was given the new acidifier “Aquasan”. The process of feeding of 0.1% of the working acidifier solutions was performed from the 27th day of fattening within 10 days (27th–31st and 34th–38th day). The growing period lasted 43 days. The moisture content of meat was determined by the method of drying, the content of protein – by the Kjeldahl method, total fat – by the Soxhlet method, the ash content – by the charring method. It has been established that the use of the “Aquasan” acidifier contributed to the increase in the productivity of broilers, the live weight of chickens on the 43rd day of breeding increased by 1.1 times (Р ≤ 0.05), and the weight of a carcass by 1.2 times (Р ≤ 0.05), in particular, by 310 g and 350 g, respectively. Also, the use of the acidifier allowed increasing the livability of chicken stock by 6% (Р ≤ 0.001). The average yield of carcasses of broilers increased by 4.4% (Р ≤ 0.05), which is 2% more than the standard values for this breed of chickens called Ross 308. With the use of the “Aquasan” acidifier, an increased content of dry matter in the broiler meat by 1.5% (Р ≤ 0.05) was noted and, accordingly, a decrease in the same percentage of moisture in meat. The protein content of chicken meat on the 43rd day of breeding increased by 0.9% (Р ≤ 0.05), ash increased by 0.3% (Р ≤ 0.05), and the fat content decreased by 0.4% (Р ≤ 0.05). Similar changes in slaughter rates and chemical composition of chicken meat were also observed in case of feeding the acidifier analogue “FEEDACID MAX L”; the difference compared with the new “Aquasan” acidifier was insignificant. Consequently, the feeding of the liquid acidifier “Aquasan” to chicken broilers from the 27th day of their breeding does not lead to deterioration in the quality of the slaughter and the chemical composition of poultry meat.
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Demchyschyn, O. V., M. D. Kuhtyn, and Yu B. Perkiy. "Toxicity and Biological Value of Broiler Chicken Meat in case of Feeding the “Aquasan” Acidifier." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 20, no. 92 (December 10, 2018): 94–97. http://dx.doi.org/10.32718/nvlvet9218.
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Employees of the Ternopil Research Station on the basis of organic and inorganic acids created a new liquid acidifier for broiler chickens called the “Aquasan”. It positively affects the preservation, productivity and constant microflora of the digestive tract in chickens. An important indicator of meat is its harmlessness and biological value. The purpose of the paper was to research the toxicity and biological value of chicken meat in case of feeding the stock with the “Aquasan” acidifier. The research was conducted on three groups of chicken broilers of the breed Ross 308–50 heads in each group. The first group of chickens was the control one, and the second group of chickens was fed with 0.1 % solution of the “Aquasan” acidifier from the 27th day of fattening within 10 days (27th–31st and 34th–38th days). The growing period lasted 43 days. Toxico-biological evaluation of chicken meat was carried out by express method using infusorias Tetrachymena pyriformis. Study of toxicity of pectoral and thigh muscles of the chickens have shown that within 24 hours of observing the infusorias, there was no death or inhibition of growth in an environment. Only on the 24th hour of observing in the experimental and control groups, there were infusorias with changes in shape and nature of movement in the amount of 0.1–0.2% cultures. The results of the research indicate that there is no acute and subacute toxicity of broiler meat in case of feeding the Acquasan acidifier. After 96 hours of research, 0.5–0.6 % of dead infusorias was found in samples of pectoral and thigh muscles in both groups. Also, there were infusorias with changes in shape and nature of movement on the 4th day, 0.3–0.4% and 0.2–0.3% respectively. There were no changes in growth of infusorias in the test group. Comparing the results of studies with control samples, it can be noted that the broiler chicken meat does not exhibit chronic toxicity. During 96 hours of research on the toxicity of chicken meat, no significant changes were found in the experimental group. Consequently, chicken meat from broilers grown with the use of “Aquasan” acidifier according to the express method is non-toxic, i.e. harmless for consumption. During the study of biological value of chicken meat, calculation of number of infusorias who grew up on the 4th day in the environment of the research samples of pectoral and thigh muscles, showed a lack of credible changes in their number as compared with the control. The absence of a reliable decrease in the relative biological value of meat indicates the high quality of the broiler chicken product in case of feeding them with the “Aquasan” acidifier.
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Peric, L., D. Zikic, and M. Lukic. "Application of alternative growth promoters in broiler production." Biotehnologija u stocarstvu 25, no. 5-6-1 (2009): 387–97. http://dx.doi.org/10.2298/bah0906387p.
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Subsequent to banning of use of antibiotics as growth promoter sin poultry nutrition, numerous studies turned to finding of alternative solutions, i.e. other, natural substances, which would have positive effect on chicken growth and feed conversion. Today, several groups of these additives are in use, and most often probiotics, prebiotics, enzymes, acidifiers, antioxidants and phytogene additives. Considering that each of the stated groups has its own specificities, objective of this work was to present main mechanism of their action and to present their effect on production results in fattening of broiler chickens through review of research published in this field.
Dissertations / Theses on the topic "Broiler chicken fattening"
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Krauß, Michael. "The Influence of Management Strategies on the Water Productivity in Dairy Farming and Broiler Production." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18560.
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Die Wasserproduktivität in der Tierhaltung ist von vielen Faktoren abhängig. Die Futterproduktion hat den größten Anteil am Wasserbedarf von tierischen Produkten. Weitere Einflussfaktoren sind die Leistung, die Reproduktion und der Gesundheitsstatus der Tiere, das Management und die Haltungsbedingungen. In dieser Arbeit sollte untersucht werden, wie sich diese Faktoren auf die Wasserproduktivität von Milch und Geflügelfleisch in Nord-Ost-Deutschland auswirken. Zehn unterschiedliche Futtermittel wurden hinsichtlich ihres Wasserbedarfes untersucht. Aus diesen Futtermitteln wurden die Rationen für die Tiere erstellt. Die Milchleistung der Kühe wurde zwischen 4.000 und 12.000 kg Milch pro Kuh und Jahr in 2.000 kg Schritten variiert. Für jedes Leistungsniveau wurden zwölf verschiedene Fütterungsstrategien untersucht, welche auf der Erhöhung einzelner Bestandteile der Ration basieren. Der Wasserbedarf von Leitungswasser im Stall wurde mit 38 Wasserzählern ermittelt. Für die Wasserproduktivität des Geflügelfleisches wurden vier verschieden intensive Mastverfahren untersucht.
Die Wasserproduktivität steigt mit steigender Milchleistung der Kühe. Das Maximum wird bei 10.000 kg Milch pro Kuh und Jahr und Rationen mit einem hohem Gras- bzw. Maissilageanteil erreicht.
Die Kühe, die im automatischen Melksystem gemolken wurden, nahmen mehr Tränkwasser zu sich, als die Kühe im Fischgrätenmelkstand. Dies ist durch die höhere Milchleistung bedingt. Im automatischen Melksystem wurden im Mittel 28,6 Liter Reinigungswasser pro Kuh und Tag benötigt. Für die Reinigung des Fischgrätenmelkstandes wurden 33,8 Liter pro Kuh und Tag genutzt.
Die untersuchten Broilermastverfahren zeigten keine Unterschiede hinsichtlich der Wasserproduktivität. Die intensivere Aufzucht und bessere Futterverwertung wurde durch eine niedrigere Wasserproduktivität des Futters kompensiert.
Der Anteil des technischen Wassers macht in der Milchkuh- und Broilerhaltung nur einen kleinen Teil am Gesamtwasserbedarf aus.Livestock production is the main user of water resources in agricultural production. Water is used in animal production for producing feed, watering the animals, and cleaning and disinfecting barns and equipment. The objective of this dissertation was to quantify the effects of management strategies, such as feeding, intensity of production and the replacement process on the water productivity of milk and poultry meat in Germany. Water productivity in milk and broiler production systems was calculated based on the methodology of Prochnow et al. (2012). Own measurements of the drinking and cleaning water demand in milk production were conducted in a dairy cow barn. The study was based on site conditions of North-East Germany with common variations in farm operations. The feed production is the main contributor to water input in dairy and poultry production. The water productivity of milk increased with an increasing milk yield. The most beneficial conditions related to water productivity in dairy farming were found to be with a milk yield of approximately 10,000 kg fat corrected milk and a grass silage and maize silage based feeding. The total technical water use in the barn makes only a minor contribution to water use. Former regression functions of the drinking water intake of the cows were reviewed and a new regression function based on the ambient temperature and the milk yield was developed. In broiler production the intensification of the fattening systems did not increase water productivity. An increase of water productivity in animal production can be achieved with various management strategies with their specific influence on the production process. The feed management should be a focus of the strategies.
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Hinz, Katharina [Verfasser], Nicole [Akademischer Betreuer] Kemper, and Birgit [Akademischer Betreuer] Spindler. "Enriched charcoal as feed additive in the nutrition of commercial broiler chickens and male fattening turkeys kept under on-farm conditions / Katharina Hinz ; Nicole Kemper, Birgit Spindler." Hannover : Stiftung Tierärztliche Hochschule Hannover, 2019. http://d-nb.info/1202272266/34.
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LANKAŠOVÁ, Jana. "Ekonomické zhodnocení vlivu vybraného biologického doplňku ve výkrmu brojlerových kuřat." Master's thesis, 2007. http://www.nusl.cz/ntk/nusl-46497.
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The influence of biological supplement AEN 700 in broiler chicken fattening was traced in operating conditions of broiler houses Kladruby.This influence was analysed economically.Compared to year 2005 when the antibiotic stimulators of growth were used there are well-balanced zootechnical and economical results.The results of development confirmed that the biological supplement AEN 700 has minimally equivalent effect in production and in economical effect compared to antibiotic stimulators of growth.
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RIŠKOVÁ, Martina. "Analýza produkce kuřecích brojlerů v zemědělském podniku Agro Čejetice a.s." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-154472.
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Production of poultry meat in the Republic and in the world has upward trend. This is primarily due to the highly fattening ability, reproductive short interval, dietetic properties of meat and good efficiency of conversion of feed nutrients. Every year across the European Union is produced about 9,6 billion broiler chickens. Broiler chicknes are specialized type of chicken bred and consume for meat. In a global comparison of the largest share of the production of poultry meat is provided by the United States and countries of the European Union. Czech Republic belongs to the volume of production to less dynamically developing countries. Chicken meat is cheaper than the other kinds of meat and this has significantly increased its market share. This is due to the fact that chicken meat contains many valuable protein and its cuisine is very simple. The subject of the master thesis was to evaluate selected influences on increment of broiler chickens in the farm Agro Čejetice s.r.o. in a time sequence of five years (2008-2012). The thesis was focused on the index calculation and observation of the effectiveness of the fattening period during each batch and on detailed observation of growths and loss in each of the locations. Also on the consumption of KKS and link to average selling weight of chicks.
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Rothstein, Susanne. "Ernährungsphysiologische Bewertung von teilentfettetem Larvenmehl der schwarzen Soldatenfliege (Hermetia illucens) für den Einsatz in ressourcenschonenden Ernährungskonzepten der Schweine- und Hähnchenmast." Doctoral thesis, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0005-128F-6.
Full textConference papers on the topic "Broiler chicken fattening"
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Doskovic, Vladimir, Snežana Bogosavljevic-Boškovic, Zdenka Škrbic, Miloš Lukic, Simeon Rakonjac, Veselin Petricevic, and Dejan Beukovic. "EFEKAT ENZIMA PROTEAZE NA PRINOS I UDEO JESTIVIH PRATEĆIH PROIZVODA KLANJA PILIĆA HIBRIDA MASTER GRIS." In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.269d.
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The effect of supplemental protease (Ronozyme ProAct) in broiler diet on the weights and percentage yields of slaughter by-products of male and female medium-growing Master Gris broiler chickens was analysed. Fattening period lasted for 63 days. Broilers were assigned to 3 experimental groups, each consisting of 100 birds. Experimental groups differed in protease levels used in their diets: control broilers (C) received complete feeds (starter, grower and finisher) without supplemental protease; chickens in the experimental group E-I were given a diet containing 0.2% protease and crude protein levels reduced by 4% compared with the control group, whereas experimental E-II broilers were fed a diet supplemented with 0.3% protease and containing crude protein levels reduced by 6% compared with C birds. The analysis of the results showed that feeding treatments had a very small effect on the weights and proportion yields of edible by-products (with difference only in the percentage yield of liver relative to live weight between C and E-I broilers, P<0.05), whereas sex was found to affect almost all slaughter by-products (except abdominal fat weight and the percentage yield of gizzard relative to live weight, P>0.05).
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Trifanov, Alexey, Ilya Plaksin, and Sergei Plaksin. "Study results of the air velocity inside the technological module for broiler chickens fattening." In 18th International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, 2019. http://dx.doi.org/10.22616/erdev2019.18.n170.
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