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Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Cerrados; Embrapa Gado de Leite; Embrapa Semiárido. |
Data corrente: |
22/04/1992 |
Data da última atualização: |
29/09/1999 |
Autoria: |
FREIRE, L. C. L. |
Título: |
The nutritive value of tropical pastures for grazing cattle. |
Ano de publicação: |
1981 |
Fonte/Imprenta: |
Queensland, Australia: James Cook University of North Queensland, 1981. |
Páginas: |
170p. |
Idioma: |
Inglês |
Notas: |
Tese Doutorado. |
Conteúdo: |
The present study describes experiments aimed at manipulating and evaluating the nutritive value of tropical pastures for grazing cattle. Before commencing experiments with grazing cattle, an experiment was conducted with sheep to determine whether the digestion of mature tropical grass forage varied appreciably from that expected from temperate grass of similar composition. Results from this experiment indicated that despite the low intake and digestibility of mature tropical grass, the digestible fraction of this forage behaved in ways predicted from published data obtained with temperate species. It was concluded that principles of rumen function and ruminant nutrition established with temperate forage species could validly be applied to tropical forage species. The subsequent experiment was aimed at avaluating the effects of superphosphate fertiliser on the botanical and chemical composition and nutritive value of the diet selected by cattle grazing Stylosanthes-native grass pastures. The data obtained in this experiment showed that superphosphate fertiliser improved the nutritive value of the diet selected. Animals grazing fertilised pastures had a significantly higher organic matter intake than those grazing unfertilised pastures during the wet and dry seasons but not during the wet-dry transition. This lower consumption with unfertilised pastures during the wet and dry seasons was associated with lower digestibility of the diet selected and possibly also with lower phosphorus content during the wet season. There was no evidence that higher organic matter intake observed for fertilised pastures was associated with a greater production of legume nor with the ingestion of a greater proportion of legume in total diet. It appears that the amount of legume in the diet was mainly determined by the time of the year and by the proportion of legume available in the pasture. Three experiments were conducted to evaluate the use of monensin sodium for manipulating rumen fermentation on the nutritive value of native pasture. The first experiment studied the effect of monensin on liveweight change of steers grazing a native pasture and the second examined this effect on the nutritive value of the forage selected during the wet and dry seasons, while the third used penned animals to study the effect of monensin on the nutritive value and utilisation of native pasture hay with and without nitrogen supplements. Results from these experiments indicated that monensin was efficient in changing the rumen fermentation patterns by increasing the production of propionic acid and reducing acetic and butyric acids. However, no beneficial effects on intake and liveweight gain of grazing animals was observed by the use of monensin during the wet or dry season. Although supplementation of the low quality hay with urea plus formaldehyde-treated casein produced an increase in the digestible organic matter intake (largely by improving both intake and digestibility), no benefit for the animal was achieved by the use of monensin. Comparisons made between predicted and observed liveweight gain of cattle grazing tropical pastures suggest that liveweight gain could accurately predicted from digestible organic matter intake by the use of tables presented by the Commonwealth Agricultural Bureaux - CAB (1980). However, estimates of feed consumption from formulae presented by the CAB underestimated the observed intakes by 25% during the wet season. There is, therefore, an urgent need for the development of equations that would allow the estimation of the digestible organic matter intake. A relationship between organic matter digestibility and digestible organic matter intake is proposed and its limitations are discussed. Although it is clear that much research is needed to elucidate problems of nutrition of cattle grazing tropical pastures, the results from this investigation suggest that the CAB system does provide a useful framework to base the development of system for livestock feeding for tropical as well as for temperate Australia. MenosThe present study describes experiments aimed at manipulating and evaluating the nutritive value of tropical pastures for grazing cattle. Before commencing experiments with grazing cattle, an experiment was conducted with sheep to determine whether the digestion of mature tropical grass forage varied appreciably from that expected from temperate grass of similar composition. Results from this experiment indicated that despite the low intake and digestibility of mature tropical grass, the digestible fraction of this forage behaved in ways predicted from published data obtained with temperate species. It was concluded that principles of rumen function and ruminant nutrition established with temperate forage species could validly be applied to tropical forage species. The subsequent experiment was aimed at avaluating the effects of superphosphate fertiliser on the botanical and chemical composition and nutritive value of the diet selected by cattle grazing Stylosanthes-native grass pastures. The data obtained in this experiment showed that superphosphate fertiliser improved the nutritive value of the diet selected. Animals grazing fertilised pastures had a significantly higher organic matter intake than those grazing unfertilised pastures during the wet and dry seasons but not during the wet-dry transition. This lower consumption with unfertilised pastures during the wet and dry seasons was associated with lower digestibility of the diet selected and possibly also with lower ph... Mostrar Tudo |
Palavras-Chave: |
Bovinae; Bovine; Feed crops; Feed grasses; Nutritive Valve; Pastagem Tropical; Pasture; Production data; Regiao Tropical; Tropical forage; Tropical Range; Tropical zones. |
Thesagro: |
Bovino; Gramínea; Gramínea Forrageira; Nutrição Animal; Pastagem; Pastejo; Planta Forrageira; Produção; Rúmen; Superfosfato; Valor Nutritivo. |
Thesaurus Nal: |
animal nutrition; cattle; digestibility; grasses; nutritive value; pastures; Stylosanthes; superphosphate. |
Categoria do assunto: |
-- |
Marc: |
LEADER 05361nam a2200505 a 4500 001 1563763 005 1999-09-29 008 1981 bl uuuu m 00u1 u #d 100 1 $aFREIRE, L. C. L. 245 $aThe nutritive value of tropical pastures for grazing cattle. 260 $aQueensland, Australia: James Cook University of North Queensland$c1981 300 $a170p. 500 $aTese Doutorado. 520 $aThe present study describes experiments aimed at manipulating and evaluating the nutritive value of tropical pastures for grazing cattle. Before commencing experiments with grazing cattle, an experiment was conducted with sheep to determine whether the digestion of mature tropical grass forage varied appreciably from that expected from temperate grass of similar composition. Results from this experiment indicated that despite the low intake and digestibility of mature tropical grass, the digestible fraction of this forage behaved in ways predicted from published data obtained with temperate species. It was concluded that principles of rumen function and ruminant nutrition established with temperate forage species could validly be applied to tropical forage species. The subsequent experiment was aimed at avaluating the effects of superphosphate fertiliser on the botanical and chemical composition and nutritive value of the diet selected by cattle grazing Stylosanthes-native grass pastures. The data obtained in this experiment showed that superphosphate fertiliser improved the nutritive value of the diet selected. Animals grazing fertilised pastures had a significantly higher organic matter intake than those grazing unfertilised pastures during the wet and dry seasons but not during the wet-dry transition. This lower consumption with unfertilised pastures during the wet and dry seasons was associated with lower digestibility of the diet selected and possibly also with lower phosphorus content during the wet season. There was no evidence that higher organic matter intake observed for fertilised pastures was associated with a greater production of legume nor with the ingestion of a greater proportion of legume in total diet. It appears that the amount of legume in the diet was mainly determined by the time of the year and by the proportion of legume available in the pasture. Three experiments were conducted to evaluate the use of monensin sodium for manipulating rumen fermentation on the nutritive value of native pasture. The first experiment studied the effect of monensin on liveweight change of steers grazing a native pasture and the second examined this effect on the nutritive value of the forage selected during the wet and dry seasons, while the third used penned animals to study the effect of monensin on the nutritive value and utilisation of native pasture hay with and without nitrogen supplements. Results from these experiments indicated that monensin was efficient in changing the rumen fermentation patterns by increasing the production of propionic acid and reducing acetic and butyric acids. However, no beneficial effects on intake and liveweight gain of grazing animals was observed by the use of monensin during the wet or dry season. Although supplementation of the low quality hay with urea plus formaldehyde-treated casein produced an increase in the digestible organic matter intake (largely by improving both intake and digestibility), no benefit for the animal was achieved by the use of monensin. Comparisons made between predicted and observed liveweight gain of cattle grazing tropical pastures suggest that liveweight gain could accurately predicted from digestible organic matter intake by the use of tables presented by the Commonwealth Agricultural Bureaux - CAB (1980). However, estimates of feed consumption from formulae presented by the CAB underestimated the observed intakes by 25% during the wet season. There is, therefore, an urgent need for the development of equations that would allow the estimation of the digestible organic matter intake. A relationship between organic matter digestibility and digestible organic matter intake is proposed and its limitations are discussed. Although it is clear that much research is needed to elucidate problems of nutrition of cattle grazing tropical pastures, the results from this investigation suggest that the CAB system does provide a useful framework to base the development of system for livestock feeding for tropical as well as for temperate Australia. 650 $aanimal nutrition 650 $acattle 650 $adigestibility 650 $agrasses 650 $anutritive value 650 $apastures 650 $aStylosanthes 650 $asuperphosphate 650 $aBovino 650 $aGramínea 650 $aGramínea Forrageira 650 $aNutrição Animal 650 $aPastagem 650 $aPastejo 650 $aPlanta Forrageira 650 $aProdução 650 $aRúmen 650 $aSuperfosfato 650 $aValor Nutritivo 653 $aBovinae 653 $aBovine 653 $aFeed crops 653 $aFeed grasses 653 $aNutritive Valve 653 $aPastagem Tropical 653 $aPasture 653 $aProduction data 653 $aRegiao Tropical 653 $aTropical forage 653 $aTropical Range 653 $aTropical zones
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Embrapa Cerrados (CPAC) |
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Registro Completo
Biblioteca(s): |
Embrapa Suínos e Aves. |
Data corrente: |
14/02/2012 |
Data da última atualização: |
15/02/2012 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
LUDTKE, C. B.; DANDIN, T.; CIOCCA, J. R. P.; BARBALHO, P.; DALLA COSTA, O. A. |
Afiliação: |
CHARLI BEATRIZ LUDTKE, WSPA; TATIANA DANDIN, WSPA; JOSÉ RODOLFO PANIM CIOCCA, WSPA; PATRICIA BARBALHO, WSPA; OSMAR ANTONIO DALLA COSTA, CNPSA. |
Título: |
Bem estar de suínos. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIÊNCIA E TECNOLOGIA DE CARNES, 6., 2011, São Pedro, SP. Anais... São Pedro, SP: ITAL/CTC, 2011. p. 47-48. |
Idioma: |
Português |
Notas: |
Projeto: 03.08.60800-01. |
Palavras-Chave: |
Bem-estar animal. |
Thesagro: |
Suíno. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/54133/1/Bem-Estar-Suinos.pdf
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Marc: |
LEADER 00594nam a2200181 a 4500 001 1915483 005 2012-02-15 008 2011 bl uuuu u00u1 u #d 100 1 $aLUDTKE, C. B. 245 $aBem estar de suínos.$h[electronic resource] 260 $aIn: CONGRESSO BRASILEIRO DE CIÊNCIA E TECNOLOGIA DE CARNES, 6., 2011, São Pedro, SP. Anais... São Pedro, SP: ITAL/CTC, 2011. p. 47-48.$c2011 500 $aProjeto: 03.08.60800-01. 650 $aSuíno 653 $aBem-estar animal 700 1 $aDANDIN, T. 700 1 $aCIOCCA, J. R. P. 700 1 $aBARBALHO, P. 700 1 $aDALLA COSTA, O. A.
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