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| Registros recuperados: 135 | |
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| Pérez Carbajal, Carlos. |
| Este experimento se llevó a cabo para analizar los efectos inmunomodulatorios de arginina (ARG) y vitamina E (VE) en pollos de engorda infectados con coccidias. Un total de 300 pollos, vacunados contra coccidiosis (Coccivac®-B) al primer día de edad, fueron divididos en seis grupos con la finalidad de evaluar tres niveles de ARG en el alimento (NARG, 1.44%; MARG, 1.74%; HARG, 2.04%) y dos niveles de VE (40 u 80 UI / kg de alimento, VE40 y VE80, respectivamente) en un diseño factorial 3 x 2. Los pollos se criaron en piso y se les proporcionó agua y una dieta a base de maíz y pasta de soya ad libitum. Al d 14, todos los pollos se infectaron oralmente con un cultivo de diferentes especies del género Eimeria (E. acervulina, E. maxima y E. tenella). A los 9,... |
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Palavras-chave: Pollos de engorda; Arginina; Vitamina E; Respuesta inmunitaria; Broilers; Arginine; Vitamin E; Immune response; Maestría; Ganadería. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/63 |
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| Pérez Carbajal, Carlos. |
| Este experimento se llevó a cabo para analizar los efectos inmunomodulatorios de arginina (ARG) y vitamina E (VE) en pollos de engorda infectados con coccidias. Un total de 300 pollos, vacunados contra coccidiosis (Coccivac®-B) al primer día de edad, fueron divididos en seis grupos con la finalidad de evaluar tres niveles de ARG en el alimento (NARG, 1.44%; MARG, 1.74%; HARG, 2.04%) y dos niveles de VE (40 u 80 UI / kg de alimento, VE40 y VE80, respectivamente) en un diseño factorial 3 x 2. Los pollos se criaron en piso y se les proporcionó agua y una dieta a base de maíz y pasta de soya ad libitum. Al d 14, todos los pollos se infectaron oralmente con un cultivo de diferentes especies del género Eimeria (E. acervulina, E. maxima y E. tenella). A los 9,... |
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Palavras-chave: Pollos de engorda; Arginina; Vitamina E; Respuesta inmunitaria; Broilers; Arginine; Vitamin E; Immune response; Maestría; Ganadería. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/63 |
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| Arroyo Villegas, Josué Juvencio. |
| La habilidad para caminar y la salud de los huesos son importantes en la producción de pollo de engorda. Se realizó un experimento (factorial 2 x 2) de cuatro tratamientos, con cuatro repeticiones (54 pollos cada una) para evaluar los efectos de las distancias (3m u 8m) y la presencia (CR) o no presencia (NR) de rampas (prisma triangular de 132 cm de ancho x 31 cm de altura x 174 cm de largo con inclinación de 38° por cada lado) entre comederos y bebederos en la resistencia a la rotura de la tibia, rendimiento de la canal y rendimiento productivo. 864 pollos machos (Cobb 500) de un día de edad se criaron convencionalmente y se asignaron al azar en corrales de piso idénticos, con libre acceso al alimento (NRC, 1994) y agua. Se evaluó el rendimiento... |
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Palavras-chave: Distancia; Rampa; Resistencia a la rotura de la tibia; Bone breaking strength; Broilers; Distance; Barriers; Latency to lie; Ganadería; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/1992 |
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| Oladele,O. A; Emikpe,B. O; Bakare,H. |
| The effect of garlic on the absorptive surface of the small intestine of broilers was investigated towards elucidating its mechanism of growth promotion. One hundred day-old Arbor acre broilers were reared in 4 separate groups of twenty-five each. Broiler diet was supplemented with graded doses of garlic meal viz: 0% - group A; 0.125% - group B; 0.25% - group C; 0.5% - group D. Feed conversion ratio (FCR) was determined at 6 week-old. At 8 week-old, five broilers/group were selected randomly, euthanized and sections of the jejunum were harvested for histological examination. Villi lengths, widths and cryptal depths were determined. Mean body weight at 8 weeks old was highest in group B (1930 ± 41g) and least in group A (1850 ± 92g). FCR was highest in... |
| Tipo: Journal article |
Palavras-chave: Body weight; Broilers; Garlic; Gut morphometry. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100042 |
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| Almeida Paz,I. C. L; Mendes,A. A; Martins,M. R. F. B; Fernandes,B. C. S; Almeida,I. C. L; Milbradt,E. L; Balog,A; Komiyama,C. M. |
| A study was carried out in the experimental facilities of FMVZ/UNESP-Botucatu, with the aim of following-up the development and the incidence of femoral degeneration (FD). A total of 305 one-day-old male broilers were housed in six pens of 5m² each. Histological analyses of femur head collected when broilers were 0, 7, 14, 21, 28, 35, and 42 days of age were carried out. At 42 days of age, 30 birds were taken to the experimental processing plant of FMVZ for leg gross examination. Ten legs per FD score where selected, and histologically analyzed to determine the most probable age at the beginning of the lesions, and to standardize femoral degeneration lesion scores. The histological results showed that cell architecture started to disorganize at 21 days of... |
| Tipo: Journal article |
Palavras-chave: Femoral degeneration; Femoral head; Broilers. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200042 |
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| Al meida Paz,I. C. L; Mendes,A. A; Martins,M. R. F. B; Fernandes,B. C. S; Almeida,I. C. L; Milbradt,E. L; Balog,A; Komiyama,C. M. |
| A study was carried out in the experimental facilities of FMVZ/UNESP-Botucatu, with the aim of following-up the development and the incidence of femoral degeneration (FD). A total of 305 one-day-old male broilers were housed in six pens of 5m² each. A completely randomized experimental design, with 3 treatments (T1traditional nutritional density diet; T2high nutritional density diet) of 3 replicates each was applied. Femoral head of the broilers were submitted to gross examination at 0, 7, 14, 21, 28, 35, and 42 days of aged. At 42 days of age, 60 birds (30 per treatment) were submitted to the Veterinary Hospital of FMVZ to determine bone mineral density by radiography. Birds were then sacrificed for gross examination of the legs, and FD scoring. Five... |
| Tipo: Journal article |
Palavras-chave: Femur; Mineral density; Broilers; Femoral degeneration; High nutritional density diets. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200045 |
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| Mariano,Flávia Cristina Martins Queiroz; Lima,Renato Ribeiro de; Alvarenga,Renata Ribeiro; Rodrigues,Paulo Borges. |
| Abstract: The objective of this work was to compare the committee neural network (CNN) and weighted multiple linear regression (WMLR) models, in order to estimate the nitrogen-corrected apparent metabolizable energy (AMEn) of poultry feedstuffs. The prediction equation was adjusted by using a WMLR model and the meta-analysis principle. The models were compared by considering the correct prediction percentages, based on the classic prediction intervals and on the highest-probability density intervals, and by using a comparison test for proportions. The accuracy of the models was evaluated based on the values of the mean squared error, coefficient of determination, mean absolute deviation, mean absolute percentage error, and bias. Data from metabolic trials... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broilers; Highest-probability density interval; Meta-analysis; Metabolizable energy; Percentage of success. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2020000103600 |
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| Ahearn, Mary Clare; Korb, Penelope J.; Banker, David E.. |
| This paper examines the industrialization process of U.S. agriculture by examining the trends in the number of farms, the concentration of production during the last decade, and the dynamics of farm survivability, entry, and exit underlying aggregate statistics. We next examine vertical coordination as part of the industrialization process and highlight contracting in the poultry industry. The analysis provides evidence that production is continuing to be concentrated on a smaller number of farms at a relatively rapid rate, in spite of the stability in the number of farms. Although contracting clearly dominates the broiler industry, it is less prevalent in egg and turkey production, where other forms of vertical coordination are likely established. |
| Tipo: Journal Article |
Palavras-chave: Broilers; Contracting; Eggs; Industrialization; Poultry; Structural change; Turkeys; Vertical integration; D23; D40; L11; L14 L22; L23; Q12. |
| Ano: 2005 |
URL: http://purl.umn.edu/43511 |
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| Key, Nigel D.; MacDonald, James M.. |
| The exercise of monopsony power by broiler processing firms is plausible because production occurs within localized complexes, which limits the number of integrators with whom growers can contract. In addition, growers face distinct hold-up risks as broiler production requires a substantial investment in specific assets and most production contracts do not involve long-term purchasing commitments by integrators. This paper provides an initial exploration of the links between the local concentration of broiler integrators and grower compensation under production contracts using data from the 2006 broiler version of USDA’s Agricultural Resource Management Survey. Results of this preliminary study, which accounts for characteristics of the operation and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Poultry; Broilers; Market power; Monopsony; Production contracts; Livestock Production/Industries; Marketing. |
| Ano: 2008 |
URL: http://purl.umn.edu/6073 |
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| MacDonald, James M.; Wang, Sun Ling. |
| We use data from a recent national survey to analyze the use of subtherapeutic antibiotics (STAs) among producers of broilers. STAs are included in feed or water and are intended to prevent disease or promote growth. Producers who do not use STAs instead rely on a set of other practices, including pathogen testing, expanded sanitary protocols, altered feeding regimens, and HACCP plans, to maintain production. We find that producers who do not use STAs realize levels of production that are slightly lower, given other inputs, than STA users, but the differences are not statistically significant. STA users realize lower payments per pound than those who are not users. The 4 percent difference, which is statistically significant, suggests that STA users have... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Antibiotics; Broilers; Production; Industrial Organization; Livestock Production/Industries; Production Economics; Q12. |
| Ano: 2009 |
URL: http://purl.umn.edu/49198 |
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| Perry, Janet E.; Banker, David E.; Green, Robert C.. |
| This study provides a comprehensive view of the organization, management, and financial performance of U.S. broiler farms. Using data from USDA's Agricultural Resource Management Study (ARMS, formerly known as the Farm Costs and Returns Survey), we examine farm size, financial structure, household income, management practices, and spousal participation in decision-making. We compare broiler operations with other farming enterprises and their earnings with that of the average U.S. household. Because most of the 7 billion broilers produced in the United States in 1995 were raised under contract, we also explore the use of contracts and the effects of contracting on the broiler sector. |
| Tipo: Report |
Palavras-chave: Contracting; Broilers; Poultry; Farm characteristics; Farm income; Farm operator characteristics; Risk management strategies; Livestock Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/33739 |
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| Goodwin, Harold L., Jr.. |
| The poultry industry is the most vertically integrated of U.S. agriculture and food production and is rapidly progressing toward being one of the most concentrated. In 2002, the top 15 broiler states accounted for 94.4% of U.S. production. From 1982-2002, the top four broiler firms had a fivefold increase in Ready-to-Cook (R-T-C) pounds, a tripling of plants and four-and eight-firm concentration ratio increases of 27.9% to 48.2% and 44.1% to 66.6%. In a broad sense, chicken became more affordable, appealing, and available; total R-T-C pounds increased from 234 to 663 million pounds between 1982 and 2002. |
| Tipo: Journal Article |
Palavras-chave: Broilers; Concentration; Poultry pricing; Poultry production; Vertical integration; L11; L22; M11; Q13; R30. |
| Ano: 2005 |
URL: http://purl.umn.edu/43510 |
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| Kalla, D.J.U.; Barrier, G.; Haruna, U.; Abubakar, Mukhtar Aishatu; Hamidu, B.M.; Murtala, N.. |
| This paper evaluate the economics of broiler production at Miango, Plateau State, Nigeria using a – 9 years record (1992 – 2000). During the period, 76 batches of broilers were reared to point of slaughter. The results shows that the enterprise incurred an average total variable cost of N620,6333.31 out of which feeding cost, day old chicks (stock) and mortality cost represents 58.13%, 19.13% and of 9.64% of the total cost of production, respectively. Total revenue within the period was estimated to be N763,969.44 which was mainly generated from the sales of broiler birds. The gross margin was found to be N143,334.13 with N0.23 as the returns per naira invested in the enterprise. Thus the broiler production is a profitable venture in the study area. |
| Tipo: Report |
Palavras-chave: Broilers; Income; Investment & Profitability; Livestock Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/54388 |
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| MacDonald, James M.. |
| Broiler production in the United States is coordinated almost entirely through systems of production contracts, in which a grower’s compensation is based, in part, on how the grower’s performance compares with that of other growers. The industry is undergoing a gradual structural change as production shifts to larger broiler enterprises that provide larger shares of an operator’s household income. Larger enterprises require substantially larger investments in broiler housing, and new or retrofitted houses are also an important source of productivity growth in the industry. This report, based on a large and representative survey of broiler operations, describes the industry’s organization, housing features, contract design, fees and enterprise cost... |
| Tipo: Report |
Palavras-chave: Broilers; Chickens; Production contracts; Broiler grower financial performance; Chicken housing; Chicken litter; Poultry; Farm Management; Production Economics. |
| Ano: 2008 |
URL: http://purl.umn.edu/58627 |
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| Harrison, R. Wes; Sambidi, Pramod R.. |
| A national survey of broiler industry executives is conducted to analyze site-specific factors related to the broiler-complex location problem. Conjoint analysis is used to analyze the broiler complex location decision. Feed costs, community attitude toward the broiler industry, availability of geographically concentrated growers, unemployment rates, and wage rates were found to be the top five factors affecting broiler company location decisions. The quality of roads between feed mill and growers; electricity, heating, water, and sewage costs; and the number of potential growers in the region were also found to be important. |
| Tipo: Journal Article |
Palavras-chave: Broilers; Conjoint analysis; Location; Poultry industry; R12; O18. |
| Ano: 2004 |
URL: http://purl.umn.edu/43457 |
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| Registros recuperados: 135 | |
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