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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
02/12/2004 |
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Data da última atualização: |
10/01/2024 |
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Autoria: |
HEANEY, D. P.; SHRESTHA, J. N. B.; PETERS, H. F. |
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Título: |
Effects of postweaning protein regimens and urea on the performance of intensively reared lambs. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Canadian Journal of Animal Science, v. 63, n. 3, p. 631-641, Sept., 1983. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Seven hundred fifty artificially reared lambs that had been weaned from milk replacer at 3?wk of age were randomly assigned, at weaning, to 12 ration sequences: 20% vs 17% dietary crude protein from weaning to 56 days of age, 17% dietary protein from 57 to 98 days of age and 17 vs 14% dietary protein from 99 to 140 days of age and each of the resulting four dietary protein concentration regimens with the protein being provided as natural protein throughout, with 30% of the protein being provided as urea throughout or with 30% of the protein being provided as urea from 57 to 140 days of age. The diets contained 72% corn-soybean meal, or corn-soybean-meal-urea and 20% ground hay, providing about 3?mcal/kg of digestible energy. Maximum growth performance was achieved by the lambs fed diets containing only natural protein in the concentration sequence of 20/17/17. However, the advantage (though statistically significant at a probability of 0.05) was small and slightly lower gains with the protein sequence of 17/17/14 might prove economical because of the savings in expensive protein supplement. There was generally no advantage in growth performance as a result of 17% vs 14% dietary protein after 98 days of age. The results also indicated that such lambs can adapt to, and utilize, urea but that introduction of urea should be delayed for about 2?wk after weaning to allow sufficient time for development of fully functional rumens. Key words: Lambs, protein requirements, urea, artificially reared, early weaned MenosAbstract: Seven hundred fifty artificially reared lambs that had been weaned from milk replacer at 3?wk of age were randomly assigned, at weaning, to 12 ration sequences: 20% vs 17% dietary crude protein from weaning to 56 days of age, 17% dietary protein from 57 to 98 days of age and 17 vs 14% dietary protein from 99 to 140 days of age and each of the resulting four dietary protein concentration regimens with the protein being provided as natural protein throughout, with 30% of the protein being provided as urea throughout or with 30% of the protein being provided as urea from 57 to 140 days of age. The diets contained 72% corn-soybean meal, or corn-soybean-meal-urea and 20% ground hay, providing about 3?mcal/kg of digestible energy. Maximum growth performance was achieved by the lambs fed diets containing only natural protein in the concentration sequence of 20/17/17. However, the advantage (though statistically significant at a probability of 0.05) was small and slightly lower gains with the protein sequence of 17/17/14 might prove economical because of the savings in expensive protein supplement. There was generally no advantage in growth performance as a result of 17% vs 14% dietary protein after 98 days of age. The results also indicated that such lambs can adapt to, and utilize, urea but that introduction of urea should be delayed for about 2?wk after weaning to allow sufficient time for development of fully functional rumens. Key words: Lambs, protein requirements, u... Mostrar Tudo |
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Palavras-Chave: |
Nível de proteína. |
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Thesagro: |
Confinamento; Conversão Alimentar; Cordeiro; Ganho de Peso; Nutrição Animal; Ovino; Uréia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02254naa a2200241 a 4500
001 1530846
005 2024-01-10
008 1983 bl uuuu u00u1 u #d
100 1 $aHEANEY, D. P.
245 $aEffects of postweaning protein regimens and urea on the performance of intensively reared lambs.$h[electronic resource]
260 $c1983
520 $aAbstract: Seven hundred fifty artificially reared lambs that had been weaned from milk replacer at 3?wk of age were randomly assigned, at weaning, to 12 ration sequences: 20% vs 17% dietary crude protein from weaning to 56 days of age, 17% dietary protein from 57 to 98 days of age and 17 vs 14% dietary protein from 99 to 140 days of age and each of the resulting four dietary protein concentration regimens with the protein being provided as natural protein throughout, with 30% of the protein being provided as urea throughout or with 30% of the protein being provided as urea from 57 to 140 days of age. The diets contained 72% corn-soybean meal, or corn-soybean-meal-urea and 20% ground hay, providing about 3?mcal/kg of digestible energy. Maximum growth performance was achieved by the lambs fed diets containing only natural protein in the concentration sequence of 20/17/17. However, the advantage (though statistically significant at a probability of 0.05) was small and slightly lower gains with the protein sequence of 17/17/14 might prove economical because of the savings in expensive protein supplement. There was generally no advantage in growth performance as a result of 17% vs 14% dietary protein after 98 days of age. The results also indicated that such lambs can adapt to, and utilize, urea but that introduction of urea should be delayed for about 2?wk after weaning to allow sufficient time for development of fully functional rumens. Key words: Lambs, protein requirements, urea, artificially reared, early weaned
650 $aConfinamento
650 $aConversão Alimentar
650 $aCordeiro
650 $aGanho de Peso
650 $aNutrição Animal
650 $aOvino
650 $aUréia
653 $aNível de proteína
700 1 $aSHRESTHA, J. N. B.
700 1 $aPETERS, H. F.
773 $tCanadian Journal of Animal Science$gv. 63, n. 3, p. 631-641, Sept., 1983.
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| 3. |  | ALVES, E. Agricultura familiar prioridade da Embrapa. Brasília, DF: Embrapa Informação Tecnológica: Embrapa-Secretaria de Administração Estratégica, 2001. 55 p. (Embrapa-Secretaria de Administração Estratégica.Texto para discussão, 9). Na publicação: Eliseu Alves.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 5. | | ALVES, E. R. de A. A agricultura familiar. Revista de Política Agrícola, Brasília, DF, ano 6, n. 3, p. 28-32, jul./set. 1997. Na publicação: Eliseu Alves.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - B |
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| 13. | | DIDONET, A. D.; FREITAS, A. A. de; MELLO, A. F. S.; EVANGELISTA, B. A.; GAVA, C. A. T.; BITTENCOURT, D. M. de C.; LIMA, D. de B.; TAVARES, E. D.; FIDALGO, E. C. C.; ALVES, E. M. P.; COUDEL, E. S.; CRUZ, F. T. da; DINIZ, J. D. de A. S.; CORREIA, J. R.; NOGUEIRA, J. D.; ESPINDOLA, J. A. A.; MEDEIROS, J. da C.; SCHWENGBER, J. E.; MORAIS, J. C. de; WOLFF, L. F.; ONOYAMA, M. M.; UDRY, M. C. F. V.; CORREIA, M. E. F.; VIDAL, M. C.; UZEDA, M. C.; PEREIRA, M. C. N.; PERDIGÃO, N. R. de O. F.; FACÓ, O.; JULIANO, R. S.; BRIENZA JUNIOR, S.; FAVARO, S. P.; VIOLA, T. H.; DIAS, T. A. B.; VIDAL, V. L.; GUEDES, V. G. F.; GUIMARÃES, V. P.; SILVA, W. T. L. da. Desafios de inovação para a agricultura familiar - estratégia para a agricultura familiar: visão de futuro rumo à inovação. In: BITTENCOURT, D. M. de C. (Ed.). Estratégias para a agricultura familiar: visão de futuro rumo à inovação. Brasília, DF: Embrapa, 2020. p. 257-289. (Texto para discussão, 49).| Tipo: Capítulo em Livro Técnico-Científico |
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| 14. | | AGUIAR, J. C. B.; PEREIRA, L. DE A.; SILVA, L. S. C. V. DA; SILVA, W. V. DA; CURADO, F. F.; SILVA, B. L.; SÁ JÚNIOR, A. N.; SALDANHA, P. T. M. Contribuições do estado da arte sobre as políticas públicas para a agricultura familiar após a agenda 2030 das Nações Unidas. International Journal of Scientific Management and Tourism, v. 10, n. 3, 2024. 20 p.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 4 |
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