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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
25/01/2019 |
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Data da última atualização: |
25/01/2019 |
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Autoria: |
ROBLES, A. Y.; BELYEA, R. L.; MARTZ, F. A.; WEISS, M. F. |
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Título: |
Effect of particle size upon digestible cell wall and rate of in vitro digestion of alfalfa and orchard grass forages. |
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Ano de publicação: |
1980 |
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Fonte/Imprenta: |
Journal of Animal Science, v. 51, n. 4, p. 783-790, Oct. 1980. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Alfalfa and orchardgrass forages chopped through a 13-mm screen were larger in particle size than were rumen ingesta samples from sheep fed the same forages. Samples of the chopped forages were ground through 1-, 4-, 8-, and 12-mm screens; particle sizes of the 8- and 12-mm ground forages were not significantly different from those of rumen ingesta samples or chopped forages. The 1- and 4-mm ground forages were significantly smaller in particle size than the 8- and 12-mm ground forages, rumen ingesta and chopped forage. Alfalfa contained less cell wall at the beginning of in vivo digestion, more cell wall residue at the end of digestion and less potentially digestible cell wall than did orchardgrass. The cell wall of alfalfa was 44% digestible, whereas that of orchardgrass was 61% digestible; particle size did not affect the amount of digestible fiber. Alfalfa ground through 1- and 4-mm screen openings had digestion rate constants that were about twice those of the 8- and 12-mm granulations (.10 less than P less than .20). Particle size did not affect rate constants of orchardgrass. These data suggest that in vitro kinetic studies based on examination of finely ground forages (1) may not reflect in vivo conditions, and (2) may depend upon the type of forage. Differences between legumes and grasses in (1) amount of digestible fiber and (2) digestion rate constants and the interaction of the above two factors with particle size and passage rate have important implications for digestibility of forage fiber. MenosAbstract: Alfalfa and orchardgrass forages chopped through a 13-mm screen were larger in particle size than were rumen ingesta samples from sheep fed the same forages. Samples of the chopped forages were ground through 1-, 4-, 8-, and 12-mm screens; particle sizes of the 8- and 12-mm ground forages were not significantly different from those of rumen ingesta samples or chopped forages. The 1- and 4-mm ground forages were significantly smaller in particle size than the 8- and 12-mm ground forages, rumen ingesta and chopped forage. Alfalfa contained less cell wall at the beginning of in vivo digestion, more cell wall residue at the end of digestion and less potentially digestible cell wall than did orchardgrass. The cell wall of alfalfa was 44% digestible, whereas that of orchardgrass was 61% digestible; particle size did not affect the amount of digestible fiber. Alfalfa ground through 1- and 4-mm screen openings had digestion rate constants that were about twice those of the 8- and 12-mm granulations (.10 less than P less than .20). Particle size did not affect rate constants of orchardgrass. These data suggest that in vitro kinetic studies based on examination of finely ground forages (1) may not reflect in vivo conditions, and (2) may depend upon the type of forage. Differences between legumes and grasses in (1) amount of digestible fiber and (2) digestion rate constants and the interaction of the above two factors with particle size and passage rate have important implica... Mostrar Tudo |
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Thesagro: |
Medicago Sativa. |
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Thesaurus Nal: |
Animal feeding; Cell walls; Forage grasses; In vitro digestion; Poaceae. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02211naa a2200229 a 4500
001 2104809
005 2019-01-25
008 1980 bl uuuu u00u1 u #d
100 1 $aROBLES, A. Y.
245 $aEffect of particle size upon digestible cell wall and rate of in vitro digestion of alfalfa and orchard grass forages.
260 $c1980
520 $aAbstract: Alfalfa and orchardgrass forages chopped through a 13-mm screen were larger in particle size than were rumen ingesta samples from sheep fed the same forages. Samples of the chopped forages were ground through 1-, 4-, 8-, and 12-mm screens; particle sizes of the 8- and 12-mm ground forages were not significantly different from those of rumen ingesta samples or chopped forages. The 1- and 4-mm ground forages were significantly smaller in particle size than the 8- and 12-mm ground forages, rumen ingesta and chopped forage. Alfalfa contained less cell wall at the beginning of in vivo digestion, more cell wall residue at the end of digestion and less potentially digestible cell wall than did orchardgrass. The cell wall of alfalfa was 44% digestible, whereas that of orchardgrass was 61% digestible; particle size did not affect the amount of digestible fiber. Alfalfa ground through 1- and 4-mm screen openings had digestion rate constants that were about twice those of the 8- and 12-mm granulations (.10 less than P less than .20). Particle size did not affect rate constants of orchardgrass. These data suggest that in vitro kinetic studies based on examination of finely ground forages (1) may not reflect in vivo conditions, and (2) may depend upon the type of forage. Differences between legumes and grasses in (1) amount of digestible fiber and (2) digestion rate constants and the interaction of the above two factors with particle size and passage rate have important implications for digestibility of forage fiber.
650 $aAnimal feeding
650 $aCell walls
650 $aForage grasses
650 $aIn vitro digestion
650 $aPoaceae
650 $aMedicago Sativa
700 1 $aBELYEA, R. L.
700 1 $aMARTZ, F. A.
700 1 $aWEISS, M. F.
773 $tJournal of Animal Science$gv. 51, n. 4, p. 783-790, Oct. 1980.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| 1. |  | WEISS, M.; ANZILIERO, D.; MARTINS, M.; WEIBLEN, R.; FLORES, E. F. Safety and immunogenicity of a glycoprotein E gene-deleted bovine herpesvirus 1 strain as a candidate vaccine strain. Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 36, n. 11, p. 1067-1074, nov. 2016.| Biblioteca(s): Embrapa Unidades Centrais. |
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