Estimativas de valores econômicos para sistemas de recria e engorda de bovinos Nelore e cruzados
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Data
2013-03-05
Autores
Oliveira, Marco Antonio Lopes de [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O objetivo geral deste trabalho foi estimar valores econômicos para um sistema de recria e engorda a partir de um Modelo Bioeconômico detalhado de quatro sistemas de produção, utilizando animais da raça Nelore e Cruzados. Os quatro modelos foram compostos da seguinte forma: 1)animais de composição 100% Nelore recriados e terminados a pasto; 2) animais de composição ½ Taurino X ½ Nelore recriados e terminados a pasto; 3) animais de composição 100% Nelore recriados a pasto e terminados em sistema de confinamento; 4) animais de composição ½ Taurino X ½ Nelore recriados a pasto e terminados em sistema de confinamento. Os valores econômicos foram estimados para as seguintes características: Ganho Médio Diário (GMD), Rendimento de Carcaça (RC), Consumo Alimentar (CA) e Energia de Mantença (EM), para cada um dos modelos propostos.Os valores econômicos dos modelos Pasto + Confinamento, baseados em R$/animal/ano foram superiores aos valores econômicos dos modelos Pasto. Isto se deve à maior eficiência dos animais que estão ocupando as áreas de pastejo, ou seja, animais mais leves e jovens possuem um menor custo para ganhar o mesmo peso do que animais mais pesados e adultos. Produzem-se mais arrobas em pastejo durante os modelos Pasto + Confinamento, quando comparado aos modelos Pasto, devido ao confinamento dos animais. As características estudadas possuem um grande impacto econômico nos sistemas de recria e engorda conforme os modelos propostos, com grande vantagem, nestes modelos, para a característica de RC. O GMD foi a segunda característica com maior valor econômico para os sistemas. As características de consumo alimentar e energia de mantença estão diretamente ligadas devido aos cálculos realizados para estimação de consumo. Estas características apresentam importância significativa no ponto de vista econômico, porém são pouco exploradas em programas...
The general objective of this work was to estimate economic values for growing and finishing systems from a detailed Bioeconomic Model of four production systems, using Nelore breed and Crossbreed animals. Those four systems were composed by the following way: 1) animals with composition 100% of Nelore blood, growing and finishing period on pasture. 2) animals with composition ½ Taurus X ½ Nelore growing and finishing on pasture. 3) animals with composition 100% Nelore growing on pasture and finishing on feedlot system. 4) animals with composition ½ taurus X ½ Nelore growing on pasture and finishing on feedlot system. The economic values was estimated for the following traits: Average Daily Gain (ADG), Dressing Percentage (DP), Feed Consumption (FC) and Maintenance Energy (ME) for each proposed system. The economic values of Pasture + Feedlot systems based on R$/animal/yearwere in majority traits, higher than the economic values of Pasture models. This is due to the higher efficiency of animals that are occupying the grazing areas, i.e., lighter and young animals have a lower cost for the same weight gain than heavier and adults animals. Produces more arrobas in grazing during the Pasture + Feedlot models when compared the Pasture models, due to confinement of animals. The studied traits have a major economic impact on the growing and finishing systems as the models proposed, with great importance, in these models, for the traits of dressing percentage. Average daily gain was the second trait with greater economic value for the system. The traits of food consumption and maintenance energy are directly linked because of calculations to estimate consumption, and are traits with significant importance in the economic point of view, and explored by genetic evaluations programs in Brazil. Feed consumption and maintenance energy are important traits when evaluating... (Complete abstract click electronic access below)
The general objective of this work was to estimate economic values for growing and finishing systems from a detailed Bioeconomic Model of four production systems, using Nelore breed and Crossbreed animals. Those four systems were composed by the following way: 1) animals with composition 100% of Nelore blood, growing and finishing period on pasture. 2) animals with composition ½ Taurus X ½ Nelore growing and finishing on pasture. 3) animals with composition 100% Nelore growing on pasture and finishing on feedlot system. 4) animals with composition ½ taurus X ½ Nelore growing on pasture and finishing on feedlot system. The economic values was estimated for the following traits: Average Daily Gain (ADG), Dressing Percentage (DP), Feed Consumption (FC) and Maintenance Energy (ME) for each proposed system. The economic values of Pasture + Feedlot systems based on R$/animal/yearwere in majority traits, higher than the economic values of Pasture models. This is due to the higher efficiency of animals that are occupying the grazing areas, i.e., lighter and young animals have a lower cost for the same weight gain than heavier and adults animals. Produces more arrobas in grazing during the Pasture + Feedlot models when compared the Pasture models, due to confinement of animals. The studied traits have a major economic impact on the growing and finishing systems as the models proposed, with great importance, in these models, for the traits of dressing percentage. Average daily gain was the second trait with greater economic value for the system. The traits of food consumption and maintenance energy are directly linked because of calculations to estimate consumption, and are traits with significant importance in the economic point of view, and explored by genetic evaluations programs in Brazil. Feed consumption and maintenance energy are important traits when evaluating... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Bovino de corte, Nelore (Zebu), Bovino - Carcaças, Carne bovina, Modelos econômicos, Carcasses
Como citar
OLIVEIRA, Marco Antonio Lopes de. Estimativas de valores econômicos para sistemas de recria e engorda de bovinos Nelore e cruzados. 2013. xiii, 101 p. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias, 2013.