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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
04/04/1994 |
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Data da última atualização: |
04/12/2006 |
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Autoria: |
THIAGO, L. R. de S. |
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Título: |
Voluntary intake of forages by ruminants: factors related to eating behaviour and rumen fill. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
[S.l.] University of Reading, 1988. |
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Páginas: |
253p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Thesis. |
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Conteúdo: |
The aim of this work was to identify dominant factors controlling the size of an individual meal by steers offered hay and silage. In the first experiment, hay and silage made from the same sward of ryegrass, cut on the same day, were offered to surgiaclly modified steers, either times daily, at 20g DM/Kg LW. Conservation method markedly affected eating behaviour, e.g., most of the hay was eaten in one large meal, while silage was consumed in many small meals. Thus, rumen fill measured at the end of the first meal was higher in hay- than silage-fed steers. Silage showed a more rapid initial loss of DM, faster increase in rumen VFA and more rapid fall in pH than hay, suggesting that while for silage the end of the first meal may be linked to some physiological mechanism, rumen distension appears to be the primary factor in hay-fed animals. Eating appeared to increase rumen motility, but the greatest activity was found during the second half of the feeding cycle. In the second experiment, ryegrass hay was offered to similar steers once daily, either at ad libitum or at restricted (18g DM/Kg LW) levels. A 33% higher DM intake for ad libitum steers was associated with increased digesta flow at the duodeum and passege rates, but did not affect digestibility. |
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Palavras-Chave: |
Feed; Forage crop; Ruminant. |
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Thesagro: |
Alimentação; Animal; Digestibilidade; Nutrição; Planta Forrageira; Rúmen; Ruminante. |
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Thesaurus Nal: |
digestibility; nutrition; voluntary intake. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02022nam a2200289 a 4500
001 1402422
005 2006-12-04
008 1988 bl uuuu m 00u1 u #d
100 1 $aTHIAGO, L. R. de S.
245 $aVoluntary intake of forages by ruminants$bfactors related to eating behaviour and rumen fill.
260 $a[S.l.] University of Reading$c1988
300 $a253p.
500 $aPh.D. Thesis.
520 $aThe aim of this work was to identify dominant factors controlling the size of an individual meal by steers offered hay and silage. In the first experiment, hay and silage made from the same sward of ryegrass, cut on the same day, were offered to surgiaclly modified steers, either times daily, at 20g DM/Kg LW. Conservation method markedly affected eating behaviour, e.g., most of the hay was eaten in one large meal, while silage was consumed in many small meals. Thus, rumen fill measured at the end of the first meal was higher in hay- than silage-fed steers. Silage showed a more rapid initial loss of DM, faster increase in rumen VFA and more rapid fall in pH than hay, suggesting that while for silage the end of the first meal may be linked to some physiological mechanism, rumen distension appears to be the primary factor in hay-fed animals. Eating appeared to increase rumen motility, but the greatest activity was found during the second half of the feeding cycle. In the second experiment, ryegrass hay was offered to similar steers once daily, either at ad libitum or at restricted (18g DM/Kg LW) levels. A 33% higher DM intake for ad libitum steers was associated with increased digesta flow at the duodeum and passege rates, but did not affect digestibility.
650 $adigestibility
650 $anutrition
650 $avoluntary intake
650 $aAlimentação
650 $aAnimal
650 $aDigestibilidade
650 $aNutrição
650 $aPlanta Forrageira
650 $aRúmen
650 $aRuminante
653 $aFeed
653 $aForage crop
653 $aRuminant
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| Registros recuperados : 2 | |
| 2. |  | MORAES, S. da S.; THIAGO, L. R. de S.; MACEDO, M. C. M.; TORRES JÚNIOR, R. A. de A. Dose única de zinco como fator moderador do estresse metabólico na desmama de bovinos de corte. In: CURSO DE MANEJO SANITÁRIO, REPRODUTIVO E NUTRICIONAL EM BOVINOS, Programa Repasto - Seprotur, turma 6 - 2. etapa, 2003, Dourados, MS. Palestras apresentadas. Campo Grande, MS: Embrapa Gado de Corte, 2003. Data de realização: 15 e 16 de setembro de 2003. p. 57-61| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 2 | |
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