Detalhes bibliográficos
| Ano de defesa: |
2014 |
| Autor(a) principal: |
Alves, Verônica Auxiliadora
 |
| Orientador(a): |
Padua, João Teodoro
|
| Banca de defesa: |
Padua, Teodoro Padua,
Silva, Rodrigo Medeiros da,
Oliveira Júnior, Reinaldo Cunha de,
Fernandes, Juliano José de Resende,
Lima, Milton Luiz Moreira |
| Tipo de documento: |
Tese
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Ciência Animal (EVZ)
|
| Departamento: |
Escola de Agronomia e Engenharia de Alimentos - EAEA (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/3867
|
Resumo: |
The objective of this study was to evaluate strategies for the use of these animals for meat production. The influence of concentrate levels in the finishing diet on the productive performance and the carcass characteristics of crossbred dairy cattle, growing on pasture with two levels of energetic supplementation was evaluated. 39 non-castrated, crossbred dairy steers were used. The behavior of these animals during the confinement was also evaluated. The growing was conducted on Brachiaria brizantha cv. Marandu under two supplementation strategies based on milled corn grain and mineral supplement until the dry season of the year. The animals showed at the beginning of the trial confinement, age and average body weight of 23 months and 417.7 ± 5.7 kg, respectively. The treatments were randomized amongst the animals: 0.7% supplementation in growing and 60 % of concentrate in the confinement diet; 0.7% supplementation in growing and 90 % of concentrate in the confinement diet; 1.2% supplementation in growing and 60 % of concentrate in the confinement diet; and 1.2% supplementation in growing and 90 % of concentrate in the confinement diet. Statistical analyzes were conducted according to a completely randomized design with a 2x2 factorial arrangement through the computer program SAS (1997). Supplementation with 1.2% of body weight during growth results in a higher initial weight at the beginning of the confinement and improves the quantitative carcass characteristics of crossbred dairy steers. The supplementation with 0.7% of body weight may result in compensatory gains during finishing, resulting in increased average daily gain of crossbred dairy steers. Qualitative characteristics of meat from crossbred dairy steers are not influenced by levels of 60% or 90% of concentrate at finishing, when the slaughter weight is predetermined. Nutritional strategies do not influence the profile of longissimus dorsi fatty acids from crossbred dairy steers finished in confinement. The inclusion of higher levels of concentrate in the diet decreases the time that animals intend for food consumption and ruminating and increases the resting time. These alterations in the ingestive behavior, however, are not sufficient to interfere in the food consumption. |
