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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
27/12/2016 |
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Data da última atualização: |
27/12/2016 |
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Autoria: |
BLACK, J. L.; BEEVER, D. E.; FAICHNEY, G. J.; HOWART, B. R.; GRAHAM, N. McC. |
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Título: |
Simulation of the effects of rumen function on the flow of nutrients from the stomach of sheep: Part 1 - Description of a computer program. |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
Agricultural Systems, v. 6, n. 3, p. 195-219, Feb. 1981. |
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DOI: |
10.1016/0308-521X(81)90002-0 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: A computer program to simulate rumen function in sheep is described. It predicts the degradation of dietary components within the rumen, products of fermentation, microbial growth yields and the flow of protein and other materials from the rumen. Input information includes: feed intake; modulus of fineness of the diet, chemical composition of the diet in terms of ?-hexose, ?-hexose, soluble carbohydrates, true protein, non-protein nitrogen, total fatty acids, inorganic sulphur and ash; potential degradability of ?-hexose and protein; factors indicating the fractional reduction in maximum rate of degradation of ?-hexose, ?-hexose and protein due to chemical and physical properties of the diet; and time spent feeding and ruminating. Inflow to the rumen of protein, non-protein nitrogen and inorganic sulphur in saliva is predicted, and the amount of each salivary and dietary substrate degraded in the rumen, flowing intact from the rumen or accumulating within the rumen is assessed. Adenosine triphosphate (ATP) released during fermentation is used for maintenance of the existing microbial mass. If ATP release is insufficient a portion of the microbial mass is catabolised, otherwise microbial growth can occur and some degraded substrates are incorporated directly into microbial protoplasm. Possible limits to microbial growth from an insufficiency of amino acids, ammonia, total nitrogen or inorganic sulphur are assessed, and the change in rumen microbial population is determined from the difference between growth and outflow of micro-organisms. Predictions from the program are shown to be stable and to respond appropriately to changes in intake and composition of the diet. MenosAbstract: A computer program to simulate rumen function in sheep is described. It predicts the degradation of dietary components within the rumen, products of fermentation, microbial growth yields and the flow of protein and other materials from the rumen. Input information includes: feed intake; modulus of fineness of the diet, chemical composition of the diet in terms of ?-hexose, ?-hexose, soluble carbohydrates, true protein, non-protein nitrogen, total fatty acids, inorganic sulphur and ash; potential degradability of ?-hexose and protein; factors indicating the fractional reduction in maximum rate of degradation of ?-hexose, ?-hexose and protein due to chemical and physical properties of the diet; and time spent feeding and ruminating. Inflow to the rumen of protein, non-protein nitrogen and inorganic sulphur in saliva is predicted, and the amount of each salivary and dietary substrate degraded in the rumen, flowing intact from the rumen or accumulating within the rumen is assessed. Adenosine triphosphate (ATP) released during fermentation is used for maintenance of the existing microbial mass. If ATP release is insufficient a portion of the microbial mass is catabolised, otherwise microbial growth can occur and some degraded substrates are incorporated directly into microbial protoplasm. Possible limits to microbial growth from an insufficiency of amino acids, ammonia, total nitrogen or inorganic sulphur are assessed, and the change in rumen microbial population is det... Mostrar Tudo |
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Palavras-Chave: |
Rumen Simulation Technique. |
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Thesagro: |
Modelo de simulação; Modelo matemático; Nutrição animal; Ovino; Rúmen. |
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Thesaurus Nal: |
Animal models; Sheep; Simulation models. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02577naa a2200289 a 4500
001 2059380
005 2016-12-27
008 1981 bl uuuu u00u1 u #d
024 7 $a10.1016/0308-521X(81)90002-0$2DOI
100 1 $aBLACK, J. L.
245 $aSimulation of the effects of rumen function on the flow of nutrients from the stomach of sheep$bPart 1 - Description of a computer program.
260 $c1981
520 $aAbstract: A computer program to simulate rumen function in sheep is described. It predicts the degradation of dietary components within the rumen, products of fermentation, microbial growth yields and the flow of protein and other materials from the rumen. Input information includes: feed intake; modulus of fineness of the diet, chemical composition of the diet in terms of ?-hexose, ?-hexose, soluble carbohydrates, true protein, non-protein nitrogen, total fatty acids, inorganic sulphur and ash; potential degradability of ?-hexose and protein; factors indicating the fractional reduction in maximum rate of degradation of ?-hexose, ?-hexose and protein due to chemical and physical properties of the diet; and time spent feeding and ruminating. Inflow to the rumen of protein, non-protein nitrogen and inorganic sulphur in saliva is predicted, and the amount of each salivary and dietary substrate degraded in the rumen, flowing intact from the rumen or accumulating within the rumen is assessed. Adenosine triphosphate (ATP) released during fermentation is used for maintenance of the existing microbial mass. If ATP release is insufficient a portion of the microbial mass is catabolised, otherwise microbial growth can occur and some degraded substrates are incorporated directly into microbial protoplasm. Possible limits to microbial growth from an insufficiency of amino acids, ammonia, total nitrogen or inorganic sulphur are assessed, and the change in rumen microbial population is determined from the difference between growth and outflow of micro-organisms. Predictions from the program are shown to be stable and to respond appropriately to changes in intake and composition of the diet.
650 $aAnimal models
650 $aSheep
650 $aSimulation models
650 $aModelo de simulação
650 $aModelo matemático
650 $aNutrição animal
650 $aOvino
650 $aRúmen
653 $aRumen Simulation Technique
700 1 $aBEEVER, D. E.
700 1 $aFAICHNEY, G. J.
700 1 $aHOWART, B. R.
700 1 $aGRAHAM, N. McC.
773 $tAgricultural Systems$gv. 6, n. 3, p. 195-219, Feb. 1981.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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