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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
27/07/1995 |
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Data da última atualização: |
27/07/1995 |
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Autoria: |
LANGLANDS, J. P.; HOLMES, C. R. |
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Título: |
The nutrition of ruminants grazing native and improved pastures. I Seasonal variation in the diet selected by grazing sheep and cattle. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, v.29, n.4, p.863-874, 1978. |
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Idioma: |
Inglês |
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Conteúdo: |
The chemical composition of the forage on offer on a native pasture dominated by Poa sieberana and Themeda australis, on a similar native pasture dressed with superphosphate and oversown with white clover, and on two Phalaris aquatica (formerly tuberosa)-Trifolium repens pastures dressed with superphosphate and grazed at different stocking rates during summer, was determined at monthly intervals during 1974 and 1975. Samples were also plucked to simulate grazing in 1975, and extrusa were collected from oesophageally fistulated cattle in both years and from fistulated sheep in 1975. Digestibility and nitrogen content of the diet were determined, and in 1974 the extrusa were manually separated into green and senescent fractions. Samples of rumen liquor were also collected through rumen fistulate, and analysed for ammonia and total and individual volatile fatty acids. The application of superphosphate and white clover, and the replacement of native grasses with Phalaris aquatica, both induced large increases in nutritive value measured in terms of digestibility, protein, macro- and micro-elements in the forage on offer and in the diert selected. Changes in the composition of the forage on offer were attributable to an increase in green materials, and to the greater nutritive value of both green and senescent fractions as th extent of pasture improvement increased. Digestibility, nitrogen and mineral content of the diet selected by cattle and sheep increased with pasture improvement, the nutritive value of the diet selected by sheep being greater on all pastures although the difference was greatest on native pasture. The increase in nutritive value of the diet selected by cattle on improved pasture was associated with an increase in the green component of the diet and in the nutritive value of the green material selected. MenosThe chemical composition of the forage on offer on a native pasture dominated by Poa sieberana and Themeda australis, on a similar native pasture dressed with superphosphate and oversown with white clover, and on two Phalaris aquatica (formerly tuberosa)-Trifolium repens pastures dressed with superphosphate and grazed at different stocking rates during summer, was determined at monthly intervals during 1974 and 1975. Samples were also plucked to simulate grazing in 1975, and extrusa were collected from oesophageally fistulated cattle in both years and from fistulated sheep in 1975. Digestibility and nitrogen content of the diet were determined, and in 1974 the extrusa were manually separated into green and senescent fractions. Samples of rumen liquor were also collected through rumen fistulate, and analysed for ammonia and total and individual volatile fatty acids. The application of superphosphate and white clover, and the replacement of native grasses with Phalaris aquatica, both induced large increases in nutritive value measured in terms of digestibility, protein, macro- and micro-elements in the forage on offer and in the diert selected. Changes in the composition of the forage on offer were attributable to an increase in green materials, and to the greater nutritive value of both green and senescent fractions as th extent of pasture improvement increased. Digestibility, nitrogen and mineral content of the diet selected by cattle and sheep increased with pasture improve... Mostrar Tudo |
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Palavras-Chave: |
Native pasture; Ruminant. |
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Thesagro: |
Dieta; Nutrição; Pastagem Nativa; Ruminante; Variação Sazonal. |
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Thesaurus Nal: |
diet; nutrition; seasonal variation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02593naa a2200253 a 4500
001 1785092
005 1995-07-27
008 1978 bl --- 0-- u #d
100 1 $aLANGLANDS, J. P.
245 $aThe nutrition of ruminants grazing native and improved pastures. I Seasonal variation in the diet selected by grazing sheep and cattle.
260 $c1978
520 $aThe chemical composition of the forage on offer on a native pasture dominated by Poa sieberana and Themeda australis, on a similar native pasture dressed with superphosphate and oversown with white clover, and on two Phalaris aquatica (formerly tuberosa)-Trifolium repens pastures dressed with superphosphate and grazed at different stocking rates during summer, was determined at monthly intervals during 1974 and 1975. Samples were also plucked to simulate grazing in 1975, and extrusa were collected from oesophageally fistulated cattle in both years and from fistulated sheep in 1975. Digestibility and nitrogen content of the diet were determined, and in 1974 the extrusa were manually separated into green and senescent fractions. Samples of rumen liquor were also collected through rumen fistulate, and analysed for ammonia and total and individual volatile fatty acids. The application of superphosphate and white clover, and the replacement of native grasses with Phalaris aquatica, both induced large increases in nutritive value measured in terms of digestibility, protein, macro- and micro-elements in the forage on offer and in the diert selected. Changes in the composition of the forage on offer were attributable to an increase in green materials, and to the greater nutritive value of both green and senescent fractions as th extent of pasture improvement increased. Digestibility, nitrogen and mineral content of the diet selected by cattle and sheep increased with pasture improvement, the nutritive value of the diet selected by sheep being greater on all pastures although the difference was greatest on native pasture. The increase in nutritive value of the diet selected by cattle on improved pasture was associated with an increase in the green component of the diet and in the nutritive value of the green material selected.
650 $adiet
650 $anutrition
650 $aseasonal variation
650 $aDieta
650 $aNutrição
650 $aPastagem Nativa
650 $aRuminante
650 $aVariação Sazonal
653 $aNative pasture
653 $aRuminant
700 1 $aHOLMES, C. R.
773 $tAustralian Journal of Agricultural Research$gv.29, n.4, p.863-874, 1978.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
19/09/2005 |
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Data da última atualização: |
28/09/2018 |
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Tipo da produção científica: |
Documentos |
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Autoria: |
ADUAN, R. E.; VILELA, M. de F.; REIS JUNIOR, F. B. dos. |
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Afiliação: |
ROBERTO ENGEL ADUAN, CPAC; MARINA DE FATIMA VILELA, CPAC; FABIO BUENO DOS REIS JUNIOR, CPAC. |
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Título: |
Os grandes ciclos biogeoquímicos do planeta. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2004. |
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Páginas: |
25 p. |
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Série: |
(Embrapa Cerrados. Documentos, 119). |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT: The aim of this work was to present in a didactic way the biogeochemical cycles of the four most important elements and substances on global chemistry: water, carbon, nitrogen and phosphorous. The importance of these elements and substances becomes from the great magnitude of mass and energy utilized in their processes, and on their essentiality on biosphere formation and maintenance. This work intends to showthe interdependence between these great cycles and the biosphere, and the way that the human activity influences on the chemical dynamic of the globe, and the consequences of these shifts for the humanity itself. |
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Palavras-Chave: |
Biogeochemical cycling; Biogeoquímica; Biosfera; Ciclagem de nutriente; Ciclo global; Global climate change; Nutrient cycling; Variação climática. |
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Thesagro: |
Água; Carbono; Fósforo; Geoquímica; Nitrogênio. |
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Categoria do assunto: |
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P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/26730/1/doc_119.pdf
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Marc: |
LEADER 01465nam a2200313 a 4500
001 1569371
005 2018-09-28
008 2004 bl uuuu u0uu1 u #d
100 1 $aADUAN, R. E.
245 $aOs grandes ciclos biogeoquímicos do planeta.
260 $aPlanaltina, DF: Embrapa Cerrados$c2004
300 $a25 p.
490 $a(Embrapa Cerrados. Documentos, 119).
520 $aABSTRACT: The aim of this work was to present in a didactic way the biogeochemical cycles of the four most important elements and substances on global chemistry: water, carbon, nitrogen and phosphorous. The importance of these elements and substances becomes from the great magnitude of mass and energy utilized in their processes, and on their essentiality on biosphere formation and maintenance. This work intends to showthe interdependence between these great cycles and the biosphere, and the way that the human activity influences on the chemical dynamic of the globe, and the consequences of these shifts for the humanity itself.
650 $aÁgua
650 $aCarbono
650 $aFósforo
650 $aGeoquímica
650 $aNitrogênio
653 $aBiogeochemical cycling
653 $aBiogeoquímica
653 $aBiosfera
653 $aCiclagem de nutriente
653 $aCiclo global
653 $aGlobal climate change
653 $aNutrient cycling
653 $aVariação climática
700 1 $aVILELA, M. de F.
700 1 $aREIS JUNIOR, F. B. dos
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