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Dissertations / Theses on the topic 'Beef cattle production'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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1

Davis, Michael Patrick Kerley Monty Stephen. "Influence of diet, production traits, blood hormones and metabolites, and mitochondrial complex protein concentrations on residual feed intake in beef cattle." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/7034.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 26, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Monty Kerley. Vita. Includes bibliographical references.

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2

Sutarno. "Candidate gene markers for production traits in beef cattle." Thesis, Sutarno, (1998) Candidate gene markers for production traits in beef cattle. PhD thesis, Murdoch University, 1998. https://researchrepository.murdoch.edu.au/id/eprint/53181/.

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In this study, two candidate gene markers, bovine growth hormone gene and mitochondrial DNA, were characterized using PCR-RFLP (Polymerase Chain Reaction - Restriction Fragment Length Polymorphism) analysis. Previous studies on variation in the growth hormone gene have contributed to our understanding of the relationship between this gene and milk production in dairy cattle, but not for production traits in beef cattle. In mitochondrial DNA, variation has also been demonstrated mostly in dairy cattle, and associated with variation in milk production. The major aims of my study, therefore, were

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3

Lalman, David Leon. "Influence of early lactation energy balance on postpartum interval, milk production, and metabolic hormone concentration in thin primiparous beef heifers /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9737895.

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4

Hill, Hester Elizabeth Johanna. "Modelling extensive beef cattle production systems for computerised decision support in South Africa." Diss., Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-02102009-114500.

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5

Abell, Kaitlynn M. "Predictive analytics and data management in beef cattle production medicine." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/35418.

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Doctor of Philosophy<br>Department of Diagnostic Medicine/Pathobiology<br>Robert L. Larson<br>Bradley J. White<br>Utilization of data analytics allows for rapid and real-time decision making in the food animal production industry. The objective of my research was to implement and utilize different data analytic strategies in multiple sectors of the beef cattle industry in order to determine management, health, and performance strategies. A retrospective analysis using reproductive and genomic records demonstrated that a bull will sire a larger number of calves in a multiple sire-pasture compa

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6

Lima, Jacqueline Geraldo de. "Dietary strategy to reduce methane emission in Brazilian beef cattle production." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-11112014-135743/.

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In Brazil, estimate of methane (CH4) emission for the National Greenhouse Gas Inventory is carried out using the empirical Tier 2 approach published by the Intergovernmental Panel on Climate Change (IPCC). Although, IPCC recommends the use of a more specific, mechanistic Tier 3 approach, this is hampered by a lack of consolidated data for development, evaluation and application of such a Tier 3 approach. The purpose of the present modelling study was to evaluate whether a Tier 3 approach instead of the Tier 2 approach has merit in estimating the effect of improvement of diet quality by feeding

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7

Allen, Lee Robert. "The impact of wild dog predation and wild dog control on beef cattle production /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19276.pdf.

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8

Du, Plessis Izak. "The effect of breed type and slaughter age on certain production parameters of beef cattle in the arid sweet bushveld." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16314.

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Thesis (MScAgric)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: The aim of this study was to provide scientifically founded guidelines to enhance the understanding of beef production from natural pastures in arid sweet veld regions. Cattle from four breed types ranging from large to small frame sizes (Simmentaler cross > Bonsmara cross > Afrikaner > Nguni) were compared in terms of cow production and efficiency as well as the growth performance, carcass and meat quality of steers slaughtered at 18, 24 and 30 months of age. Eighteen and 30 month old steers were slaughtered at the

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9

Botha, Theunis Christoffel. "Effect of selected physical and production traits on the tick burdens of beef cattle." Thesis, Port Elizabeth Technikon, 2002. http://hdl.handle.net/10948/91.

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The objective of this study was to determine the effect of selected traits such as age, sex, body weight, body length and height, body condition score (BCS), coatscore (CS), skin thickness and average skin surface temperature on tick burdens in beef cattle. Bonsmara cattle (n= 143) were used to measure visible tick counts, body condition score, coat score, skin thickness, body height and length, body weight, body surface temperature, gender and inter calving period. Measurements were taken from April to December. All animals were managed extensively on natural and cultivated pastures near Geor

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10

McClain, William Edward. "Phosphorus nutrition in tall fescue from stockpiling to seed production /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4870.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on September 28, 2007) Vita. Includes bibliographical references.

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11

Hessle, Anna. "Beef cattle on semi-natural grasslands : production of meat and nature conservation /." Skara : Dept. of Animal Environment and Health, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200732.pdf.

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12

Dodd, Charles C. "Epidemiology of salmonella and E. coli O157 in beef cattle production systems." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/6916.

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Doctor of Philosophy<br>Food Science Institute -- Diagnostic Medicine/Pathobiology<br>David G. Renter<br>Salmonella and Escherichia coli O157 are important causes of foodborne illness in humans and have been associated with the consumption of undercooked, contaminated beef. Individual feedlot cattle may shed these organisms in their feces and subsequently contaminate cattle hides and carcasses at harvest. Preharvest and harvest interventions may significantly decrease the risk of beef contamination and subsequent risk of human illness. Previous research suggests that preharvest intervention

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13

Busato, André. "The epidemiology of production diseases in Swiss dairy and beef cattle herds /." Bern : [s.n.], 2000. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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14

Romanczak, Taryn. "Prediction of forage intake and production of steers in a winter forage system." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4214.

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Thesis (M.S.)--West Virginia University, 2005.<br>Title from document title page. Document formatted into pages; contains xi, 104 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 95-104).

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15

Wileman, Ben. "Preharvest Escherichia coli o157:h7 vaccination of beef cattle: industry-wide acceptance through a beef production lifecycle approach." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/4612.

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Doctor of Philosophy<br>Department of Diagnostic Medicine/Pathobiology<br>Daniel U. Thomson<br>Escherichia coli O157:H7 is responsible for over 70,000 cases of human illness every year in the United States. Most cases occur in children under the age of five, the elderly, or other immune-compromised people. A small percentage of these cases will develop a life threatening complication, hemolytic uremic syndrome. Cattle are the reservoir host for E. coli O157:H7 and serve as the main source of contamination of meat products and other food sources. The beef cattle industry is diverse with pro

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16

Horne, Willy J. "Application of vaccination protocols to manage beef cattle productivity and mitigate production risk." [College Station, Tex. : Texas A&M University, 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-561.

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17

Cardoso, Abmael da Silva. "Greenhouse gas emissons and N2O mitigation in beef cattle production on tropical pasture /." Jaboticabal, 2016. http://hdl.handle.net/11449/135851.

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Orientador: Ana Cláudia Ruggieri<br>Banca: Carlos Eduardo Pellegrino Cerri<br>Banca: Patrícia Perondi Anchão de Oliveira<br>Banca: Ricardo Andrade Reis<br>Banca: Mara Cristina Pessoa da Cruz<br>Resumo: Metano (CH4) e óxido nitroso (N2O) são dois dos mais importantes gases de efeito estufa emitidos pela pecuária. Eles são produzidos pelas excretas dos animais e fertilizantes. No Brasil, a quantidade emitida destes gases e opções para mitigação foram pouco exploradas. Uma sequência de 4 experimentos foram realizados em campo (em duas estações chuvosas e duas secas, 106 dias de duração cada) com

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18

Nichols, Bryan Micheal. "Effects of metabolizable protein supplementation and intake on cow production." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/nichols/NicholsB0510.pdf.

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In 2008, two-yr-old Angus and Simmental x Angus pregnant, non-lactating heifers (n = 120, initial BW = 448 Â± 36 kg) had individual feed intake determined using a GrowSafe feeding system. Dietary treatments were based on approximately 85% grass hay and 15% supplement. Supplements contained whole soybeans plus corn (102% MP) or dried distillers grains plus soybean meal (119% MP). After 35 d of intake measurement, heifers were placed into adjacent pens and fed their diets for an additional 50 or 82 d. Upon completion of the feeding trial, heifers were transported back to the ranch,

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19

Sánchez, Ramírez José Manuel. "INFLUENCE OF SACCHAROMYCES CEREVISIAE ON THE ENVIRONMENTAL EFFICIENCY OF METHANE PRODUCTION IN DAIRY AND BEEF CATTLE: META-ANALYSIS." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2018. http://hdl.handle.net/20.500.11799/94354.

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The use of feed additives (e.g. yeasts products) for reduction of ruminants’ methane (CH4) production has drawn the attention of cattle nutritionists and environmentalists. Although there are many relevant studies on this topic, but the obtained results for dairy and beef cattle are contradictory. Therefore, the objective of the present study is to examine the effect of yeast (Saccharomyces cerevisiae) on reduction of CH4 production in dairy and beef cattle using meta-analytic methods. After compilation of relevant articles published between 1990 and 2016 and applying exclusion and inclu

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20

Ponnamaneni, Padmaja. "Economically sustainable cattle production practices during multiple years of drought and differing price cycles." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1445044271&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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21

Mapiye, Cletos. "Cattle production on communal rangelands of South Africa and the potential of acacia karroo in improving Nguni beef production." Thesis, University of Fort Hare, 2009. http://hdl.handle.net/10353/d1000989.

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22

Costa-Roura, Sandra. "Alternatives for the redesign of beef cattle production: dietary protein, forage intake and feed efficiency." Doctoral thesis, Universitat de Lleida, 2021. http://hdl.handle.net/10803/672376.

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La present tesi ha servit per avaluar estratègies per tal de redissenyar els sistemes d’engreix intensiu de vedells, amb l’objectiu de millorar-ne els resultats econòmics i disminuir-ne l’impacte mediambiental. A més, se n’ha determinat el vincle amb la microbiota ruminal, fent èmfasi en el concepte de rusticitat. Les estratègies testades van ser: la reducció del contingut de proteïna bruta de la dieta del 14 % al 12 % (sobre matèria seca); la substitució de la palla de cereal per un farratge de més qualitat (fenolatge de civada o de veça); i la millora de l’eficiència alimentària dels animals

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23

Taylor, Glen James. "Factors affecting the production and reproduction performance of tropically adapted beef cattle in southern Africa." Thesis, University of Pretoria, 2006. http://hdl.handle.net/2263/26985.

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In the first study, non-genetic influences on pre- and post-weaning growth traits of a tropically adapted beef breed in the arid sub-tropical environment of Southern Africa were investigated. Production data of Santa Gertrudis cattle for a ten-year period were analysed. The herds were managed extensively under harsh arid environmental conditions in the northern thornveld region of Namibia. The cattle were divided into summer and winter breeding seasons, which were limited to 90 days for each group. The effect of sex, herd, season, calf birth year and cow parity group on birth weight, pre-weani

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24

Romanzini, Eliéder Prates. "Economic evaluation, strategy and prediction studies of results into beef cattle production using different scenarios /." Jaboticabal, 2019. http://hdl.handle.net/11449/183167.

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Orientador: Euclides Braga Malheiros<br>Resumo: A pecuária de corte brasileira tem sido pressionada no sentido de cada vez obter melhores resultados, o que força os proprietários a utilizar práticas e manejos específicos, os quais possibilitarão a manutenção dentro da atividade. Este estudo teve como objetivos avaliar o uso de inteligência artificial, mais especificamente redes neurais artificiais (RNA), para predizer resultados futuros tanto da produção de pasto quanto animal. Determinar dentre diversos cenários de recria e terminação de bovinos de corte em pastagens tropicais, qual foi o mel

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25

Kirkpatrick, Denise Elizabeth. "The effects of diet utilization on metabolizable energy utilization and carcass composition in beef cattle and sheep." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295414.

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26

Pashi, Katenda. "An economic analysis of the production and utilization of high-oil corn on mixed crop and beef cattle farms in north central Missouri /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3025643.

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27

Nin-Velez, Alexandra Irma. "Genetic and Maternal Factors Underlying Early Milk Production and Their Influence on Calf Health." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99957.

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The quality of early milk produced by dams is affected by various factors (i.e. breed, age, parity, environment, nutrition, management). The impact of these factors on the quality of milk then have subsequent effects on calf health and development. Producers are responsible for following guidelines in order to ensure that they feed calves optimal quality milk in order to produce a healthy animal. They can also regulate factors such as environment and nutrition of the dam in order to produce better quality early milk. However, even after maximizing these factors there is still high mortality ra

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28

Visagie, Pieter Cornelis. "Effect of the production environment on the production efficiency of Bonsmara cows in South Africa." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/24963.

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The production environment is known to have a large influence on extensively managed beef cows. A better understanding of the relationship between the beef cow and her environment should be useful in the pursuit of improving beef cow efficiency. The influence of the production environment on the efficiency of extensively managed Bonsmara cows was investigated through a series of research objectives. It was found that VEGMAP’s bioregion classification system can be used to describe the South African beef production regions. The environmental characteristics with the potential to influence beef

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Téno, Gabriel. "The cost-benefit analysis of extending the grazing season in beef cattle production in Atlantic Canada." Mémoire, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/9902.

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The aim of the study was to integrate economics, forage agronomy and livestock production data to determine the economic costs and benefits of management techniques that can extend the grazing season for beef production in Atlantic Canada. The results of the study show that extending the grazing season is financially and economically beneficial for both an Atlantic beef farmer and the whole Atlantic community. Extending the grazing season could be thus an alternative solution to enhance beef farm viability in Atlantic Canada. It can also contribute to the sustainable development of beef cattle

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30

Bungenstab, Elias José Muntifering Russell Brian. "Productivity, nutritive quality and utilization of dallisgrass (Paspalum dilatatum) for beef cattle production as influenced by fertilization regime and grazing management." Auburn, Ala, 2009. http://hdl.handle.net/10415/1867.

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31

Marandure, Tawanda. "Sustainability of smallholder cattle production and its vertical integration into the formal beef market value chain in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97974.

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Thesis (MSc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: A survey to assess the sustainability and marketing opportunities for smallholder cattle production systems was conducted by consulting with a total of 95 smallholder cattle producers in Ncorha and Gxwalibomvu communities in the Eastern Cape Province (ECP) of South Africa. In addition, a total of 18 surrounding beef retailers, 5 abattoirs that supplied beef to these retailers and 155 beef consumers who bought beef from these retailers between February 2013 and February 2014 were also interviewed using pretested structured questi

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Silveira, Vicente. "Farmer integrated decision model : integration between beef cattle and rice production in Rio Grande do Sul, Brazil." Thesis, University of Edinburgh, 2000. http://hdl.handle.net/1842/27385.

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Rio Grande do Sul is the southern state of Brazil. The Southern part of the Rio Grande do Sul state, an area of approximately the size of England, is part of the Campos sub-region of the Rio de La Plata temperate sub-humid grasslands ecosystem. Beef cattle and the rice crop are the main economic activities in this region. The main goal of this thesis was to simulate the dynamic nature of the farm with the partnership between finishing beef cattle and the rice crop that can be carried out in Rio Grande do Sul, Brazil. To achieve this goal crop, livestock and economic models were developed and i

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33

Jeske, Barry Dean. "Environmental indicators for sustainable beef cattle/forage production, case study for the south Interlake region of Manitoba." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0008/MQ53110.pdf.

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Brown, Gary Robert. "Use of phenotypic target objectives in beef cattle crossbreeding strategies to increase uniformity in production and product." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0015/MQ55657.pdf.

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35

Jaborek, Jerad R. "Use of Diverse Cattle Breeds to Understand Marbling Development and Growth for the Production of High-Quality Beef." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574348508186835.

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36

Tucker, Grace. "Key drivers of producer trust for sources and methods of accessing management information." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/13961.

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Master of Science<br>Department of Agricultural Economics<br>Glynn Tonsor<br>Accessing new management information is crucial for the effective management of an operation in any industry. Beef producers are no exception to this as producers are exposed to numerous risks. The use and implementation of new management information by producers can assist in managing the operation to limit a producer’s risk exposure. The beef industry in the United States today is comprised of a large number of small producers, and operations can be categorized into three segments - cow-calf, stocker/backgrounder

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Lowe, Victoria H., and Victoria H. Lowe. "Effects of Early Weaning Calves as a Management Tool." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/625344.

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The goal of a cow-calf producer is to produce a calf each year per cow. Research suggests that first year heifers struggle breeding back with their second calf because of the adjustments to new range/main herd conditions and the partitioning of nutrients between gaining weight, milk production, and gestation. This study was conducted at the V-V ranch at the University of Arizona for five years and looked at the effects on young cows when calves were weaned from first year heifers at 80 days rather than 205 days. Early weaning allows for gestational benefits because they are given the opportuni

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Hagenmaier, Jacob Andrew. "Investigation into an ongoing dilemma: undefined welfare implications challenging the use of β-adrenergic agonists in beef production". Diss., Kansas State University, 2016. http://hdl.handle.net/2097/35217.

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Doctor of Philosophy<br>Department of Diagnostic Medicine/Pathobiology<br>Daniel U. Thomson<br>Beta-adrenergic agonists (βAA) are administered during the final weeks of the beef production system to improve efficiency and increase meat yield. Welfare concerns linked to the administration of βAA have garnered significant attention in recent years due to anecdotal reports of increased mortality during βAA feeding periods and cattle without obvious disease or injury having difficulty walking at abattoirs being overrepresented in cattle fed βAA. Thomson et al. (2015) reported 2 events where cattle

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Mazzetto, André Mancebo. "Greenhouse gas emission on Brazilian beef production: from experimental data to farm-scale modeling." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/64/64135/tde-04112014-102157/.

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The emission of greenhouse gases (GHG) is currently intensely debated issue. Countries with reduction targets of GHG emissions have developed studies to understand the processes and reduce the emissions. Farming is the main source of GHG emissions in Brazil. Among the main products of Brazilian agriculture is cattle, handled mainly in the extensive system, where animals are slaughtered at an average of three to four years and grassland receives little or no cultural tract. Quantification and monitoring of GHG emissions in agricultural systems enable the evaluation of the degree of impact on th

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Barrera, Leonel Prieto. "The use of simulation modelling in the study of the production and utilisation of 'star' grass (Cynodon nlemfuensis) and several managerial alternatives for beef production in the humid tropics of Mexico." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315421.

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Nqeno, Noluvuyo. "Reproductive performance of cows in sweet and sour veld types under communal production systems in the Eastern Cape Province of South Africa." Thesis, University of Fort Hare, 2008. http://hdl.handle.net/10353/141.

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The objective of the study was to evaluate cow reproductive performance in the sweetveld and sourveld communal grazing areas of the Eastern Cape Province, South Africa. In the first experiment, farmer perceptions were obtained using participatory rural appraisals. Farmers ranked lack of fences, tick-borne diseases, poor animal condition during winter and poor breeding practices, respectively as major constraints limiting cattle production in the Eastern Cape. Cattle, sheep and goats, in that order, were ranked as the most important livestock species and were mainly kept for meat, cash and cere

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Trindade, Carly Pinheiro. "Viabilidade da produção de gado de corte no Amazonas: um estudo de caso no município de Parintins." Universidade Federal do Amazonas, 2002. http://tede.ufam.edu.br/handle/tede/4189.

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Submitted by Alisson Mota (alisson.davidbeckam@gmail.com) on 2015-06-25T20:22:59Z No. of bitstreams: 1 Dissertação - Carly Pinheiro Tindade.pdf: 30204953 bytes, checksum: 094a45b1c0e6c399e587da7249306fb8 (MD5)<br>Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-06-29T15:47:30Z (GMT) No. of bitstreams: 1 Dissertação - Carly Pinheiro Tindade.pdf: 30204953 bytes, checksum: 094a45b1c0e6c399e587da7249306fb8 (MD5)<br>Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-06-29T15:49:18Z

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Ballesteros, Raúl David Guevara. "Enteric Methane and Nitrogen Emissions in Beef Cattle Grazing a Tannin-Containing Legume Relative to Feedlot and Traditional Pasture-Based Production Systems." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7666.

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Beef cattle production is highly criticized because of the high use of land and water resources, and by the pollution (e.g., the gas methane in a cow’s breath and nitrogen in urine) produced by cows fed in feedlots. In contrast to feedlots diets and grasses, some plants (e.g., legumes) contain bioactive compounds (condensed tannins) that reduce pollution and enhance animal nutrition. In my research, I observed that cows grazing a tannin-containing legume (birdsfoot trefoil; BFT) had methane emissions similar to cows fed a feedlot ration with comparable weight gains. Cows in the BFT treatment g

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Alemu, Aklilu W. "Modelling greenhouse gas emissions in cattle: From rumen to the whole-farm." Elsevier B.V. (Animal Feed Science and Technology), 2011. http://hdl.handle.net/1993/14668.

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Mathematical modeling in animal agriculture can be applied at various levels including at the tissue, organ, animal, farm, regional and global levels. The purposes of this research were i) to evaluate models used to estimate volatile fatty acid (VFA) and methane (CH4) production and assess their impact on regional enteric CH4 inventory, and ii) to develop a process-based, whole-farm model to estimate net farm GHG emissions. In the first study, four VFA stoichiometric models were evaluated for their prediction accuracy of rumen VFA and enteric CH4 production. Comparison of measured and model pr

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Kearnan, Jeffrey Mark. "Pre- and postpartum nutritional effects on milk production, milk composition, calf weaning weight and postpartum reproductive performance of commercial beef cows." Thesis, Virginia Tech, 1991. http://hdl.handle.net/10919/41535.

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The purpose of this study was to investigate the effect of prepartum and postpartum nutrition on milk production of commercial beef cows. Forty-three Angus or Angus X Holstein females, ranging in age from 2 to 6 yr, were randomly assigned by age and percentage Holstein within age to one of two prepartum grazing treatments (PRE). All females, regardless of PRE, were assigned at calving to receive the same post-calving nutritional energy. Females were assigned at calving by age, percentage Holstein within age, prepartum nutritional treatment and calving date to one of two milking groups. Milk we

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Campos, José Guilherme Ferraz de. "As estratégias relativas às mudanças climáticas para a carne bovina no Brasil: estudo de caso de três elos da cadeia produtiva." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/12/12139/tde-26112013-194653/.

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A questão das mudanças climáticas é indicada como um dos principais desafios atuais à humanidade. As empresas, enquanto ator importante da sociedade, inicialmente se mostraram refratárias à imputação da responsabilidade parcial pela questão das mudanças climáticas, tendo, por vezes, uma postura de negação quanto a sua ocorrência e contra a imposição de regulações que as obrigassem a reduzir suas emissões. Atualmente, contudo, as empresas têm se mostrado mais proativas no desenvolvimento de ações visando gerir as mudanças climáticas, o que inclui a mensuração e o estabelecimento de metas quanto

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Oliveira, Tamara Esteves de. "Metodologia para quantificação do risco das tecnologias na pecuária de cria." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/67541.

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Este trabalho propõe uma metodologia para auxiliar o empresário rural no momento de decidir qual a tecnologia menos arriscada para aumentar a taxa de prenhez em seu sistema de produção de bezerros. Para tanto, foram avaliadas as percepções de especialistas quanto a sete fatores a partir dos quais foi desenvolvida uma equação para calcular este risco. Tais parâmetros e suas definições foram apresentados em questionários aos 18 especialistas, selecionados por amostragem não probabilística. Neste documento foram listadas 32 tecnologias, avaliadas de acordo com os parâmetros conforme a escala Like

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Lacerda, António Luís Melo Costa Pinheiro de. "Efeito do genótipo da linha materna na margem bruta da exploração de bovinos aleitantes em cruzamento industrial." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária e Instituto Superior de Agronomia, 2016. http://hdl.handle.net/10400.5/13061.

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Dissertação de Mestrado em Engenharia Zootécnica/Produção Animal<br>Com o presente trabalho pretende-se avaliar a viabilidade económica de dois sistemas de cruzamento de bovinos aleitantes em sistemas extensivos no território nacional. Os cruzamentos estudados neste trabalho são o cruzamento de fêmeas de raças autóctones portuguesas e o cruzamento de fêmeas cruzadas com machos de raças exóticas selecionadas para a produção carne. A fim de avaliar a rentabilidade destas atividades inquiriu-se uma exploração agropecuária, detentora de vacas de raça mertolenga, raça preta e vacas cruzadas, toda

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Dill, Matheus Dhein. "Efeitos da utilização de tecnologias de produção e procedimentos gerenciais sobre a taxa de desmame em sistemas de produção de bezerros." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/89730.

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As inovações tecnológicas e os avanços das fronteiras agropecuárias promoveram para o Brasil uma posição de destaque no mercado internacional da carne bovina. Entretanto, no estado Rio Grande do Sul a produção de bezerros de corte apresenta baixos índices reprodutivos e financeiros. Deste modo, cabe ao pecuarista aprimorar sua capacidade tecnológica e gerencial para otimizar a produção. Nesse contexto, os programas de fomento à pecuária são desafiados a prestarem serviços de informação e alinhamento técnico para que os pecuaristas progridam na atividade. Esse trabalho está divido em dois objet

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Sessim, Amir Gil. "Análise econômica de sistemas de produção de bovinos de corte na região do Pampa do Rio Grande do Sul." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/140818.

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O presente trabalho contextualiza a importância da determinação da viabilidade técnico-financeira em sistemas de produção de bovinos de corte, através da aplicação de uma análise técnica e econômica. O objetivo do presente estudo foi realizar uma análise produtiva e econômica de sistemas de produção de bovinos de corte na região do Pampa do Rio Grande do Sul. Foram analisadas quatro propriedades rurais pertencentes a uma empresa agropecuária, localizadas no município de Dom Pedrito, e denominadas como Sistema de Cria em Campo Nativo (SCN), Sistema de Cria com Agricultura (SCA), Sistema de Recr

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