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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
09/11/2023 |
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Autoria: |
ORSKOV, E. R. |
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Título: |
Nutritional principles and evaluation of by-products, waste products and new feeds for ruminants. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Livestock Production Science, v. 4, n. 2, p. 165-175, 1977. |
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DOI: |
https://doi.org/10.1016/0301-6226(77)90033-1 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Evaluation of by- or waste products for ruminants is in principle no different from evaluation of other feedstuffs, but by-products may have some of the following disadvantages. They are often variable in composition, strictly seasonal and local in production, and often contain undesirable contaminants of organic or inorganic origin. The use of simple and inexpensive techniques to gain knowledge of suitability for animal feeds is discussed. For compounds high in nitrogen this involves an assessment of protein and non-protein nitrogen and the rate of rumen degradation of protein in order to assess whether the nitrogen would be mainly a source of nitrogen for rumen microbes or for additional host animal protein need. The evaluation of by-products as sources of energy can be made firstly by chemical analysis and secondly by determination of their rate and extent of rumen degradation. This can be determined by incubating the materials in nylon bags in the rumen. Animal experiments should include information on digestibility and voluntary food intake, and in order for an experiment to be meaningful, the materials studied should constitute the largest proportion of the diet. The type of animal and its level and type of production for which various sorts of by-product are most suited are discussed, together with their influence on rumen pH and type of fermentation in relation to possible associative effects when given together with other foods. Finally, various categories of by-product are discussed in relation to their protein: energy ratio and how they can form the most efficient combination with other foods. MenosAbstract: Evaluation of by- or waste products for ruminants is in principle no different from evaluation of other feedstuffs, but by-products may have some of the following disadvantages. They are often variable in composition, strictly seasonal and local in production, and often contain undesirable contaminants of organic or inorganic origin. The use of simple and inexpensive techniques to gain knowledge of suitability for animal feeds is discussed. For compounds high in nitrogen this involves an assessment of protein and non-protein nitrogen and the rate of rumen degradation of protein in order to assess whether the nitrogen would be mainly a source of nitrogen for rumen microbes or for additional host animal protein need. The evaluation of by-products as sources of energy can be made firstly by chemical analysis and secondly by determination of their rate and extent of rumen degradation. This can be determined by incubating the materials in nylon bags in the rumen. Animal experiments should include information on digestibility and voluntary food intake, and in order for an experiment to be meaningful, the materials studied should constitute the largest proportion of the diet. The type of animal and its level and type of production for which various sorts of by-product are most suited are discussed, together with their influence on rumen pH and type of fermentation in relation to possible associative effects when given together with other foods. Finally, various categories... Mostrar Tudo |
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Palavras-Chave: |
Sub-produto; Utilizacao. |
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Thesagro: |
Nutrição; Ruminante. |
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Thesaurus Nal: |
Byproducts; Ruminant nutrition. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02280naa a2200205 a 4500
001 1520818
005 2023-11-09
008 1977 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/0301-6226(77)90033-1$2DOI
100 1 $aORSKOV, E. R.
245 $aNutritional principles and evaluation of by-products, waste products and new feeds for ruminants.$h[electronic resource]
260 $c1977
520 $aAbstract: Evaluation of by- or waste products for ruminants is in principle no different from evaluation of other feedstuffs, but by-products may have some of the following disadvantages. They are often variable in composition, strictly seasonal and local in production, and often contain undesirable contaminants of organic or inorganic origin. The use of simple and inexpensive techniques to gain knowledge of suitability for animal feeds is discussed. For compounds high in nitrogen this involves an assessment of protein and non-protein nitrogen and the rate of rumen degradation of protein in order to assess whether the nitrogen would be mainly a source of nitrogen for rumen microbes or for additional host animal protein need. The evaluation of by-products as sources of energy can be made firstly by chemical analysis and secondly by determination of their rate and extent of rumen degradation. This can be determined by incubating the materials in nylon bags in the rumen. Animal experiments should include information on digestibility and voluntary food intake, and in order for an experiment to be meaningful, the materials studied should constitute the largest proportion of the diet. The type of animal and its level and type of production for which various sorts of by-product are most suited are discussed, together with their influence on rumen pH and type of fermentation in relation to possible associative effects when given together with other foods. Finally, various categories of by-product are discussed in relation to their protein: energy ratio and how they can form the most efficient combination with other foods.
650 $aByproducts
650 $aRuminant nutrition
650 $aNutrição
650 $aRuminante
653 $aSub-produto
653 $aUtilizacao
773 $tLivestock Production Science$gv. 4, n. 2, p. 165-175, 1977.
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Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 5 | |
| 2. |  | GOUVEIA, D. M.; RUSCHEL, A. R.; MACHADO, H. B.; SOARES, M. H. M. Análise da dinâmica de crescimento em espécies florestais por grupo ecológico na Flona do Tapajós. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 15., 2011, Belém, PA. A ciência de fazer ciência: anais. Belém, PA: Embrapa Amazônia Oriental, 2011. 1 CD-ROM. PIBIC-2011.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 3. | | SILVA, W. F. M.; MAZZEI, L.; RUSCHEL, A. R.; SOARES, M. H. M.; BENTES, D. S.; GOUVEIA, D. M. Dynamics of the diameter distribuition of a logged forest in Brazilian amazon. In: ANNUAL MEETING OF THE ASSOCIATION FOR TROPICAL BIOLOGY AND CONSERVATION, 49., 2012, Bonito. Ecology, evolution and sustainable use of tropical biodiversity. [S.l.]: ATBC, 2012. p. 993. MAZZEI [i.e. FREITAS], L. J. M.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 4. | | SILVA, W. F. M. da; RUSCHEL, A. R.; HIGUCHI, N.; SOARES, M. H. M.; GOUVEIA, D. M. Levantamento florístico da regeneração natural em uma floresta após 26 anos de exploaração na Flona do Tapajós-PA. In: SIMPÓSIO NACIONAL DE INVENTÁRIO FLORESTAL, 2., 2013, Curitiba. Anais. Brasília, DF: Serviço Florestal Brasileiro, 2013. p. 111.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 5. | | SMOGINSKI, A. P. A.; RUSCHEL, A. R.; GOUVEIA, D. M.; PIEDADE FILHO, E. R. V.; MACHADO, H. B.; SILVA, W. F. M. da. Aspectos fitossociológicos de uma floresta antropizada no município Dom Eliseu, Pará. In: REUNIÃO ANUAL DA SBPC, 64., São Luis, 2012. Ciência, cultura e saberes tradicionais para enfrentar a pobreza. São Luís: SBPC: UFMA, 2012.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 5 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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