Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/10848 |
Resumo: | This work presents the bio-economical evaluation of beef cattle production systems used by farmers in the state of Rio Grande do Sul. Animal production, pasture dynamics and economically related results of two agriculturally integrated systems were studied according to topography, and a third system based on improved native pasture. In order to do this, steers were used, placed in paddocks previously sowed with annual ryegrass (Lolium multiflorum Lam.). Animal performance was also used for the evaluation of mathematical models according to accuracy in predicting weight gain, which may assist in choosing the most adequate system for each situation. It has been verified that the reduced input of insume in the pasture has made the production of forage smaller than the productive potential of this species, resulting in low animal stock rate. The forage masses have apparently caused limitations, in a certain period, to the intake of dry matter by the animal, still allowing expressive individual gains to be verified. The results from slaughterhouse productivity were obtained from carcass evaluation, applied to the analysis of system viability. Thus, only the systems that were preceded by crop production had positive economic results. Among the two mathematical models tested only one of them was capable of estimating adequately the animal live weight gain in the three production systems. The reduced forage masses above mentioned are appointed as a source of error to the models, even though the Pampa Corte model has been efficient in predicting animal performance in the three systems. It has been concluded that the farmer has alternatives for increasing beef cattle profit, among which production cost reduction brought through the integration between crop production, influence in the slaughter price variable, like the use of protection mechanisms against price oscillation and/or qualitative differentiation. Similarly, a series of factors that interfere in the increment of productive efficiency can be applied, using mathematical modelling as an auxiliary tool to quantify its effects. |
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2017-06-052017-06-052007-02-15SILVA, Alexandre Coradini Fontoura da. Finishing steers systems: bio-economy and model evaluation for predicting animal performance. 2007. 100 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Santa Maria, Santa Maria, 2007.http://repositorio.ufsm.br/handle/1/10848This work presents the bio-economical evaluation of beef cattle production systems used by farmers in the state of Rio Grande do Sul. Animal production, pasture dynamics and economically related results of two agriculturally integrated systems were studied according to topography, and a third system based on improved native pasture. In order to do this, steers were used, placed in paddocks previously sowed with annual ryegrass (Lolium multiflorum Lam.). Animal performance was also used for the evaluation of mathematical models according to accuracy in predicting weight gain, which may assist in choosing the most adequate system for each situation. It has been verified that the reduced input of insume in the pasture has made the production of forage smaller than the productive potential of this species, resulting in low animal stock rate. The forage masses have apparently caused limitations, in a certain period, to the intake of dry matter by the animal, still allowing expressive individual gains to be verified. The results from slaughterhouse productivity were obtained from carcass evaluation, applied to the analysis of system viability. Thus, only the systems that were preceded by crop production had positive economic results. Among the two mathematical models tested only one of them was capable of estimating adequately the animal live weight gain in the three production systems. The reduced forage masses above mentioned are appointed as a source of error to the models, even though the Pampa Corte model has been efficient in predicting animal performance in the three systems. It has been concluded that the farmer has alternatives for increasing beef cattle profit, among which production cost reduction brought through the integration between crop production, influence in the slaughter price variable, like the use of protection mechanisms against price oscillation and/or qualitative differentiation. Similarly, a series of factors that interfere in the increment of productive efficiency can be applied, using mathematical modelling as an auxiliary tool to quantify its effects.A avaliação bio-econômica de sistemas de produção de bovinos de corte passíveis de serem adotados pelos pecuaristas do Rio Grande do Sul é apresentada neste trabalho. Foram estudados a produção animal, a dinâmica das pastagens e os resultados de ordem econômica de dois sistemas integrados com agricultura, de acordo com a topografia das áreas, e de um terceiro sistema, baseado em pastagem nativa melhorada. Para isto utilizou-se novilhos de corte, alocados nos piquetes após o estabelecimento de azevém (Lolium multiflorum Lam.) previamente semeado. O desempenho dos animais foi utilizado também para a avaliação de modelos matemáticos quanto à acurácia em predizer o ganho de peso, o que pode auxiliar na escolha dos sistemas mais adequados a cada situação. Constatou-se que o reduzido aporte de insumos nas pastagens fez com que a produção de forragem fosse menor que o potencial produtivo desta espécie, resultando em baixa carga animal. As massas de forragem aparentemente provocaram limitações, em determinado período, ao consumo de matéria seca pelos animais, não impedindo que fossem verificados ganhos médios individuais expressivos. Da avaliação das carcaças obteve-se os resultados de rendimento frigorífico, empregados para a análise da viabilidade dos sistemas. Assim, apenas aqueles sistemas que foram precedidos por agricultura proporcionaram resultados econômicos positivos. Entre os dois modelos matemáticos testados apenas um foi capaz de estimar adequadamente a evolução do peso vivo dos animais nos três sistemas de produção. As reduzidas massas de forragem, como mencionado anteriormente, são apontadas como uma fonte de erro aos modelos, embora o modelo Pampa Corte tenha sido eficaz em predizer o desempenho dos animais para os três sistemas testados. Conclui-se que o produtor rural dispõe de alternativas para o incremento da lucratividade da bovinocultura de corte, entre as quais a redução dos custos de produção proporcionada pela integração com agricultura e a atuação sobre a variável preços de animais para o abate, como o emprego de mecanismos de proteção contra oscilação de preços e/ou diferenciação qualitativa. Da mesma forma, uma série de fatores que interferem sobre o aumento da eficiência produtiva podem ser empregados, tendo a modelagem matemática como uma ferramenta auxiliar para quantificar seus efeitos.application/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em ZootecniaUFSMBRZootecniaLucratividadeModelagemProdução animalProfitabilityModellingAnimal productionCNPQ::CIENCIAS AGRARIAS::ZOOTECNIASistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animalFinishing steers systems: bio-economy and model evaluation for predicting animal performanceinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisQuadros, Fernando Luiz Ferreira dehttp://lattes.cnpq.br/9202266292366562Gonçalves, Maria Beatriz Fernandezhttp://lattes.cnpq.br/9576409110248820Machado, João Armando Dessimonhttp://lattes.cnpq.br/9583873223268882http://lattes.cnpq.br/6584311818564264Silva, Alexandre Coradini Fontoura da50040000000240050030030050087f7a696-584d-4ee4-ad83-13fd04320556ca4f9ccb-6ee3-4439-b8e2-a1d37c98567445a5e25f-3e5d-45a4-a731-a054c9f2f434a501fe3f-beb3-4ff2-a74d-a597e1a38946info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALAlexandre Coradini.pdfapplication/pdf470302http://repositorio.ufsm.br/bitstream/1/10848/1/Alexandre%20Coradini.pdf51888650b2e86339d6f59133632f872cMD51TEXTAlexandre Coradini.pdf.txtAlexandre Coradini.pdf.txtExtracted texttext/plain180854http://repositorio.ufsm.br/bitstream/1/10848/2/Alexandre%20Coradini.pdf.txt71d4a294e1369cb59a0b2e52641e795dMD52THUMBNAILAlexandre Coradini.pdf.jpgAlexandre Coradini.pdf.jpgIM Thumbnailimage/jpeg5049http://repositorio.ufsm.br/bitstream/1/10848/3/Alexandre%20Coradini.pdf.jpg80254c54cd99775e220160ed1f0ea259MD531/108482023-02-14 12:17:00.35oai:repositorio.ufsm.br:1/10848Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132023-02-14T15:17Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal |
dc.title.alternative.eng.fl_str_mv |
Finishing steers systems: bio-economy and model evaluation for predicting animal performance |
title |
Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal |
spellingShingle |
Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal Silva, Alexandre Coradini Fontoura da Lucratividade Modelagem Produção animal Profitability Modelling Animal production CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA |
title_short |
Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal |
title_full |
Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal |
title_fullStr |
Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal |
title_full_unstemmed |
Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal |
title_sort |
Sistemas de terminação de novilhos de corte: bioeconomicidade e avaliação de modelos para a predição do desempenho animal |
author |
Silva, Alexandre Coradini Fontoura da |
author_facet |
Silva, Alexandre Coradini Fontoura da |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Quadros, Fernando Luiz Ferreira de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9202266292366562 |
dc.contributor.referee1.fl_str_mv |
Gonçalves, Maria Beatriz Fernandez |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/9576409110248820 |
dc.contributor.referee2.fl_str_mv |
Machado, João Armando Dessimon |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/9583873223268882 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6584311818564264 |
dc.contributor.author.fl_str_mv |
Silva, Alexandre Coradini Fontoura da |
contributor_str_mv |
Quadros, Fernando Luiz Ferreira de Gonçalves, Maria Beatriz Fernandez Machado, João Armando Dessimon |
dc.subject.por.fl_str_mv |
Lucratividade Modelagem Produção animal |
topic |
Lucratividade Modelagem Produção animal Profitability Modelling Animal production CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA |
dc.subject.eng.fl_str_mv |
Profitability Modelling Animal production |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA |
description |
This work presents the bio-economical evaluation of beef cattle production systems used by farmers in the state of Rio Grande do Sul. Animal production, pasture dynamics and economically related results of two agriculturally integrated systems were studied according to topography, and a third system based on improved native pasture. In order to do this, steers were used, placed in paddocks previously sowed with annual ryegrass (Lolium multiflorum Lam.). Animal performance was also used for the evaluation of mathematical models according to accuracy in predicting weight gain, which may assist in choosing the most adequate system for each situation. It has been verified that the reduced input of insume in the pasture has made the production of forage smaller than the productive potential of this species, resulting in low animal stock rate. The forage masses have apparently caused limitations, in a certain period, to the intake of dry matter by the animal, still allowing expressive individual gains to be verified. The results from slaughterhouse productivity were obtained from carcass evaluation, applied to the analysis of system viability. Thus, only the systems that were preceded by crop production had positive economic results. Among the two mathematical models tested only one of them was capable of estimating adequately the animal live weight gain in the three production systems. The reduced forage masses above mentioned are appointed as a source of error to the models, even though the Pampa Corte model has been efficient in predicting animal performance in the three systems. It has been concluded that the farmer has alternatives for increasing beef cattle profit, among which production cost reduction brought through the integration between crop production, influence in the slaughter price variable, like the use of protection mechanisms against price oscillation and/or qualitative differentiation. Similarly, a series of factors that interfere in the increment of productive efficiency can be applied, using mathematical modelling as an auxiliary tool to quantify its effects. |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007-02-15 |
dc.date.accessioned.fl_str_mv |
2017-06-05 |
dc.date.available.fl_str_mv |
2017-06-05 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SILVA, Alexandre Coradini Fontoura da. Finishing steers systems: bio-economy and model evaluation for predicting animal performance. 2007. 100 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Santa Maria, Santa Maria, 2007. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/10848 |
identifier_str_mv |
SILVA, Alexandre Coradini Fontoura da. Finishing steers systems: bio-economy and model evaluation for predicting animal performance. 2007. 100 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Santa Maria, Santa Maria, 2007. |
url |
http://repositorio.ufsm.br/handle/1/10848 |
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