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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
09/09/2016 |
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Data da última atualização: |
03/10/2016 |
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Autoria: |
SCHNEIDER, K. M.; TERNOUTH, J. H.; SEVILLA, C. C.; BOSTON, R. C. |
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Título: |
A short-term study of calcium and phosphorus absorption in sheep fed on diets high and low in calcium and phosphorus. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, v. 36, n. 1, p. 91-105, 1985. |
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DOI: |
10.1071/AR9850091 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Compartmental modelling techniques were used to measure the absorption of calcium and phosphorus in young sheep which had been fed ad libitum for 6 months on one of four diets containing 1.35 or 8.2 g calcium and 0.72 or 4.5 g phosphorus per kg dry matter. In most of the compartmental models, absorption could be represented by a primary and secondary compartment. The percentage of 45Ca absorbed increased as calcium intake decreased so that the amount of calcium absorbed was not greatly affected by changes in the dietary intake or abomasal contents of calcium. Also, there were no differences due to treatment in the amount of calcium absorbed by primary or secondary absorption. The percentage of 32P absorbed did not vary between treatments, although the percentage absorbed by primary absorption was higher in sheep on low phosphorus diets. For secondary absorption, the percentage absorbed was higher in sheep on high phosphorus diets. The amount of phosphorus absorbed by primary absorption was the same for all treatments; however, sheep on low phosphorus diets absorbed very little phosphorus by secondary absorption, whereas sheep on high phosphorus diets absorbed 2.5 times as much phosphorus as those on low phosphorus diets. The amounts of mineral absorbed by primary absorption for phosphorus and calcium, and by secondary absorption for calcium, were not altered by changes in the amount of phosphorus or calcium mixed with the tracer, indicating that primary absorption may be saturable for phosphorus and calcium and secondary absorption for calcium. The large absorption of phosphorus by the secondary compartment was proportional to the amount of phosphorus in the lower small intestine and therefore the phosphorus was probably absorbed by a non-saturable mechanism. MenosAbstract: Compartmental modelling techniques were used to measure the absorption of calcium and phosphorus in young sheep which had been fed ad libitum for 6 months on one of four diets containing 1.35 or 8.2 g calcium and 0.72 or 4.5 g phosphorus per kg dry matter. In most of the compartmental models, absorption could be represented by a primary and secondary compartment. The percentage of 45Ca absorbed increased as calcium intake decreased so that the amount of calcium absorbed was not greatly affected by changes in the dietary intake or abomasal contents of calcium. Also, there were no differences due to treatment in the amount of calcium absorbed by primary or secondary absorption. The percentage of 32P absorbed did not vary between treatments, although the percentage absorbed by primary absorption was higher in sheep on low phosphorus diets. For secondary absorption, the percentage absorbed was higher in sheep on high phosphorus diets. The amount of phosphorus absorbed by primary absorption was the same for all treatments; however, sheep on low phosphorus diets absorbed very little phosphorus by secondary absorption, whereas sheep on high phosphorus diets absorbed 2.5 times as much phosphorus as those on low phosphorus diets. The amounts of mineral absorbed by primary absorption for phosphorus and calcium, and by secondary absorption for calcium, were not altered by changes in the amount of phosphorus or calcium mixed with the tracer, indicating that primary absorption ... Mostrar Tudo |
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Palavras-Chave: |
Absorção de nutriente; Ad libitum; Unrestricted feeding. |
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Thesagro: |
Alimento para animal; Cálcio; Fósforo; Nutrição animal; Ovino; Suplemento mineral; Volumosos. |
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Thesaurus Nal: |
Absorption; Animal nutrition; Calcium; Feed supplements; Phosphorus; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02822naa a2200361 a 4500
001 2052619
005 2016-10-03
008 1985 bl uuuu u00u1 u #d
024 7 $a10.1071/AR9850091$2DOI
100 1 $aSCHNEIDER, K. M.
245 $aA short-term study of calcium and phosphorus absorption in sheep fed on diets high and low in calcium and phosphorus.
260 $c1985
520 $aAbstract: Compartmental modelling techniques were used to measure the absorption of calcium and phosphorus in young sheep which had been fed ad libitum for 6 months on one of four diets containing 1.35 or 8.2 g calcium and 0.72 or 4.5 g phosphorus per kg dry matter. In most of the compartmental models, absorption could be represented by a primary and secondary compartment. The percentage of 45Ca absorbed increased as calcium intake decreased so that the amount of calcium absorbed was not greatly affected by changes in the dietary intake or abomasal contents of calcium. Also, there were no differences due to treatment in the amount of calcium absorbed by primary or secondary absorption. The percentage of 32P absorbed did not vary between treatments, although the percentage absorbed by primary absorption was higher in sheep on low phosphorus diets. For secondary absorption, the percentage absorbed was higher in sheep on high phosphorus diets. The amount of phosphorus absorbed by primary absorption was the same for all treatments; however, sheep on low phosphorus diets absorbed very little phosphorus by secondary absorption, whereas sheep on high phosphorus diets absorbed 2.5 times as much phosphorus as those on low phosphorus diets. The amounts of mineral absorbed by primary absorption for phosphorus and calcium, and by secondary absorption for calcium, were not altered by changes in the amount of phosphorus or calcium mixed with the tracer, indicating that primary absorption may be saturable for phosphorus and calcium and secondary absorption for calcium. The large absorption of phosphorus by the secondary compartment was proportional to the amount of phosphorus in the lower small intestine and therefore the phosphorus was probably absorbed by a non-saturable mechanism.
650 $aAbsorption
650 $aAnimal nutrition
650 $aCalcium
650 $aFeed supplements
650 $aPhosphorus
650 $aSheep
650 $aAlimento para animal
650 $aCálcio
650 $aFósforo
650 $aNutrição animal
650 $aOvino
650 $aSuplemento mineral
650 $aVolumosos
653 $aAbsorção de nutriente
653 $aAd libitum
653 $aUnrestricted feeding
700 1 $aTERNOUTH, J. H.
700 1 $aSEVILLA, C. C.
700 1 $aBOSTON, R. C.
773 $tAustralian Journal of Agricultural Research$gv. 36, n. 1, p. 91-105, 1985.
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Embrapa Caprinos e Ovinos (CNPC) |
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| 6. |  | RAUBER, L. P.; PICCOLLA, C. D.; ANDRADE, A. P.; FRIEDERICHS, A.; MAFRA, A. L.; CORREA, J. C.; ALBUQUERQUE, J. A. Physical properties and organic carbon content of a rhodic kandiudox fertilized with pig slurry and poultry litter. Revista Brasileira de Ciencia do Solo, v. 36, n. 4, p. 1323-1332, 2012. Projeto: 11.11.11.111.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Suínos e Aves. |
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| 7. | | BALBINOT JUNIOR, A. A.; VEIGA, M. da; MORAES, A. de; PELISSARI, A.; MAFRA, A. L.; PICCOLLA, C. D. Winter pasture and cover crops and their effects on soil and summer grain crops. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 46, n. 10, p. 1357-1363, out. 2011.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
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| Registros recuperados : 7 | |
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