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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: |
29/03/2023 |
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Autoria: |
RANAWANA, S. S. E.; KELLAWAY, R. C. |
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Afiliação: |
Department of Animal Husbandry, University of Sydney, Australia. |
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Título: |
Responses to postruminal infusions of graded levels of casein in lactating goats. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
British Journal Nutrition, v. 37, n. 1, p. 67-79, Jan. 1977. |
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DOI: |
https://doi.org/10.1079/BJN19770008 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: 1. A study was made in goats of the response in terms of milk production, nitrogen utilization, plasma amino acids and amino acid uptake by the mammary gland, to postruminal infusion of casein. Goats in early lactation, housed in metabolism cages, were fed on 2-5 kg basal ration/d (containing 111 g crude protein (N X 6-25)/kg) and were given, by infusion into the abomasum, 0, 15, 30 or 45 g casein/d. 2. Milk production increased from 2-41 kg/d on the basal ration to 2-52, 2-80 and 2-94 kg/d in response to infusions of 15, 30 and 45 g casein/d respectively. Milk composition was unaffected except for milk fat, which was slightly decreased during infusions of the higher levels of casein. 3. The goats were found to be in positive N balance on the basal ration. Milk N output increased with casein infusion; the increase was equvalent to a miximum of 49% of the infused N. 4. The concentration of glucose in arterial blood plasma was decreased at the highest level of casein infusion but that of plasma urea N was unaffected by treatments. 5. Casein infusions increased the concentrations of total indispensable amino acids and the ratio, indispensable: dispensable amino acids in arterial plasma. Arterial concentrations and mammary extractions of most indispensable amino acis were increased, but only a few increases were statistically significant (Pless than 0-05); 6. Comparison of individual indispensable amino acids absorbed from the intestine with output in milk indicated that methionine was probably the first limiting amino acid. 7. The results of the experiment were compared to those of similar experiments with cows that have been reported by other workers. The possible ways in which the infused casein may have caused the responses were discussed. However, no firm conclusions regarding the mechanism involved could be drawn from the results of the present study.. MenosAbstract: 1. A study was made in goats of the response in terms of milk production, nitrogen utilization, plasma amino acids and amino acid uptake by the mammary gland, to postruminal infusion of casein. Goats in early lactation, housed in metabolism cages, were fed on 2-5 kg basal ration/d (containing 111 g crude protein (N X 6-25)/kg) and were given, by infusion into the abomasum, 0, 15, 30 or 45 g casein/d. 2. Milk production increased from 2-41 kg/d on the basal ration to 2-52, 2-80 and 2-94 kg/d in response to infusions of 15, 30 and 45 g casein/d respectively. Milk composition was unaffected except for milk fat, which was slightly decreased during infusions of the higher levels of casein. 3. The goats were found to be in positive N balance on the basal ration. Milk N output increased with casein infusion; the increase was equvalent to a miximum of 49% of the infused N. 4. The concentration of glucose in arterial blood plasma was decreased at the highest level of casein infusion but that of plasma urea N was unaffected by treatments. 5. Casein infusions increased the concentrations of total indispensable amino acids and the ratio, indispensable: dispensable amino acids in arterial plasma. Arterial concentrations and mammary extractions of most indispensable amino acis were increased, but only a few increases were statistically significant (Pless than 0-05); 6. Comparison of individual indispensable amino acids absorbed from the intestine with output in milk indicated th... Mostrar Tudo |
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Thesagro: |
Cabra Leiteira; Caprino; Caseína; Lactação; Leite; Nutrição. |
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Thesaurus Nal: |
Casein; Dairy goats; Lactation. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02611naa a2200253 a 4500
001 1522083
005 2023-03-29
008 1977 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1079/BJN19770008$2DOI
100 1 $aRANAWANA, S. S. E.
245 $aResponses to postruminal infusions of graded levels of casein in lactating goats.$h[electronic resource]
260 $c1977
520 $aAbstract: 1. A study was made in goats of the response in terms of milk production, nitrogen utilization, plasma amino acids and amino acid uptake by the mammary gland, to postruminal infusion of casein. Goats in early lactation, housed in metabolism cages, were fed on 2-5 kg basal ration/d (containing 111 g crude protein (N X 6-25)/kg) and were given, by infusion into the abomasum, 0, 15, 30 or 45 g casein/d. 2. Milk production increased from 2-41 kg/d on the basal ration to 2-52, 2-80 and 2-94 kg/d in response to infusions of 15, 30 and 45 g casein/d respectively. Milk composition was unaffected except for milk fat, which was slightly decreased during infusions of the higher levels of casein. 3. The goats were found to be in positive N balance on the basal ration. Milk N output increased with casein infusion; the increase was equvalent to a miximum of 49% of the infused N. 4. The concentration of glucose in arterial blood plasma was decreased at the highest level of casein infusion but that of plasma urea N was unaffected by treatments. 5. Casein infusions increased the concentrations of total indispensable amino acids and the ratio, indispensable: dispensable amino acids in arterial plasma. Arterial concentrations and mammary extractions of most indispensable amino acis were increased, but only a few increases were statistically significant (Pless than 0-05); 6. Comparison of individual indispensable amino acids absorbed from the intestine with output in milk indicated that methionine was probably the first limiting amino acid. 7. The results of the experiment were compared to those of similar experiments with cows that have been reported by other workers. The possible ways in which the infused casein may have caused the responses were discussed. However, no firm conclusions regarding the mechanism involved could be drawn from the results of the present study..
650 $aCasein
650 $aDairy goats
650 $aLactation
650 $aCabra Leiteira
650 $aCaprino
650 $aCaseína
650 $aLactação
650 $aLeite
650 $aNutrição
700 1 $aKELLAWAY, R. C.
773 $tBritish Journal Nutrition$gv. 37, n. 1, p. 67-79, Jan. 1977.
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| 1. |  | GUIDICE, O. B. SILVA; OLIVEIRA, T. S. de; COSTA, A. M. M.; CORRÊA-FILHO, L. C.; LIMA, J. P.; FOGACA, F. H. dos S.; CABRAL, L. M. C.; TONON, R. V. Development of alginate-based coatings incorporated with oregano essential oil nanoemulsions for application to fish fillets. In: CONGRESSO BRASILEIRO DE CIÊNCIA E TECNOLOGIA DE ALIMENTOS, 29., 2024. Florianópolis. Trabalhos aprovados. O futuro dos alimentos: inovação, saúde e sustentabilidade na cadeia produtiva de alimentos. Santa Catarina: Sociedade Brasileira de Ciência e Tecnologia de Alimentos. CBCTA. 14 a 17 out. 2024. E-Pôster.| Tipo: Resumo em Anais de Congresso |
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