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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
29/12/1999 |
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Data da última atualização: |
31/05/2007 |
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Autoria: |
CANTARUTTI, R. B.; TARRE, R.; MACEDO, R.; CADISCH, G.; REZENDE, C. de P.; PEREIRA, J. M.; BRAGA, J. M.; GOMIDE, J. A.; FERREIRA, E.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
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Título: |
The effect of grazing intensity and the presence of a forage legume on nitrogen dynamics in Brachiaria pastures in the Atlantic forest region of the South of Bahia, Brazil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Nutrient Cycling in Agroecossytems, Netherlands, v. 64, p. 257-271, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
It has been shown that with careful grazing management and addition of p and K. but not N. fertilisers Brachiaria pastures are able to maintain sustainable live weight gains over many years. However. standard on-farm practice. which generally involves high stocking rates. leads after a few years to pasture decline due mainly to N deficiency for grass regrowth. To generate an understanding of the mechanism of pasture decline and possible management options to mitigate this process. a study was performed in the Atlantic forest region of the south of Bahia state to study the N dynamics in pastures of Brachiaria humidicola subject to three different stocking rates of beef cattle. with and without the presence of the forage legume Desmodium ovalifolium. Despite the fact that the C:N ratio of the deposited litter was high (60 to 70) the rate of decomposition was very rapid (k --0.07 9 g-l day-1) and annual rates of N turnover through the litter pathway were between 105 and 170 kg N ha-1 year-1. In the grass-only pastures as stocking rate increased from 2 to 3 head ha -1. N recycled in the litter decreased by 11 %. but a further increase to 4 head ha-1 decreased N recycling by 30% suggesting that beyond a certain critical level higher grazing stocking rates would lead to pasture decline if there was no N addition. High stocking rates decreased the proportion of the legume in the sward. but at all rates the concentration of N in both the green and dead grass in the forage on offer and in the litter was higher in the mixed sward. The presence of the legume caused a decrease in the C:N ratio of the microbial biomass while both soil N minera1isation and nitrification increased. This increased rate of turnover of the microbia1 biomass and the contribution of N2 fixation to the legume resulted in large increases in the N recycled via litter deposition ranging from 42 to 155 kg N ha-1 year-1. MenosIt has been shown that with careful grazing management and addition of p and K. but not N. fertilisers Brachiaria pastures are able to maintain sustainable live weight gains over many years. However. standard on-farm practice. which generally involves high stocking rates. leads after a few years to pasture decline due mainly to N deficiency for grass regrowth. To generate an understanding of the mechanism of pasture decline and possible management options to mitigate this process. a study was performed in the Atlantic forest region of the south of Bahia state to study the N dynamics in pastures of Brachiaria humidicola subject to three different stocking rates of beef cattle. with and without the presence of the forage legume Desmodium ovalifolium. Despite the fact that the C:N ratio of the deposited litter was high (60 to 70) the rate of decomposition was very rapid (k --0.07 9 g-l day-1) and annual rates of N turnover through the litter pathway were between 105 and 170 kg N ha-1 year-1. In the grass-only pastures as stocking rate increased from 2 to 3 head ha -1. N recycled in the litter decreased by 11 %. but a further increase to 4 head ha-1 decreased N recycling by 30% suggesting that beyond a certain critical level higher grazing stocking rates would lead to pasture decline if there was no N addition. High stocking rates decreased the proportion of the legume in the sward. but at all rates the concentration of N in both the green and dead grass in the forage on offer a... Mostrar Tudo |
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Thesagro: |
Brachiaria; Leguminosa Forrageira. |
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Thesaurus Nal: |
forage legumes. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02805naa a2200289 a 4500
001 1624177
005 2007-05-31
008 2002 bl --- 0-- u #d
100 1 $aCANTARUTTI, R. B.
245 $aThe effect of grazing intensity and the presence of a forage legume on nitrogen dynamics in Brachiaria pastures in the Atlantic forest region of the South of Bahia, Brazil.
260 $c2002
520 $aIt has been shown that with careful grazing management and addition of p and K. but not N. fertilisers Brachiaria pastures are able to maintain sustainable live weight gains over many years. However. standard on-farm practice. which generally involves high stocking rates. leads after a few years to pasture decline due mainly to N deficiency for grass regrowth. To generate an understanding of the mechanism of pasture decline and possible management options to mitigate this process. a study was performed in the Atlantic forest region of the south of Bahia state to study the N dynamics in pastures of Brachiaria humidicola subject to three different stocking rates of beef cattle. with and without the presence of the forage legume Desmodium ovalifolium. Despite the fact that the C:N ratio of the deposited litter was high (60 to 70) the rate of decomposition was very rapid (k --0.07 9 g-l day-1) and annual rates of N turnover through the litter pathway were between 105 and 170 kg N ha-1 year-1. In the grass-only pastures as stocking rate increased from 2 to 3 head ha -1. N recycled in the litter decreased by 11 %. but a further increase to 4 head ha-1 decreased N recycling by 30% suggesting that beyond a certain critical level higher grazing stocking rates would lead to pasture decline if there was no N addition. High stocking rates decreased the proportion of the legume in the sward. but at all rates the concentration of N in both the green and dead grass in the forage on offer and in the litter was higher in the mixed sward. The presence of the legume caused a decrease in the C:N ratio of the microbial biomass while both soil N minera1isation and nitrification increased. This increased rate of turnover of the microbia1 biomass and the contribution of N2 fixation to the legume resulted in large increases in the N recycled via litter deposition ranging from 42 to 155 kg N ha-1 year-1.
650 $aforage legumes
650 $aBrachiaria
650 $aLeguminosa Forrageira
700 1 $aTARRE, R.
700 1 $aMACEDO, R.
700 1 $aCADISCH, G.
700 1 $aREZENDE, C. de P.
700 1 $aPEREIRA, J. M.
700 1 $aBRAGA, J. M.
700 1 $aGOMIDE, J. A.
700 1 $aFERREIRA, E.
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tNutrient Cycling in Agroecossytems, Netherlands$gv. 64, p. 257-271, 2002.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| Registros recuperados : 47 | |
| 4. |  | PEREIRA, J. M.; SILVA, J. F.; SANTOS, R. S. Leptopharsa heveae. In: LEMES, P. G.; ZANUNCIO, J. C. (org.). Novo manual de pragas florestais brasileiras. Montes Claros: Instituto de Ciências Agrárias da Universidade Federal de Minas Gerais, 2021. Cap. 15.2.2, p. 316-323.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
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| 7. | | PEREIRA, J. M. N.; FALCÃO, L. L.; GANDER, E. S.; MARCELLINO, L. H. Isolamento e caracterização do promotor do gene waxy de milheto (Pennisetum glaucum). In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 10., 2005, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2005. p. 73.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 8. | | PEREIRA, J. M.; REZENDE, C. de P.; EUCLIDES, V. P. B.; VALLE, C. B. do; BORGES, A. M. F. Avaliação de novos acessos de "Brachiaria brizanta" no Sul da Bahia. 1. Produção animal. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 41., 2004, Campo Grande, MS. A produção animal e a segurança alimentar: anais dos simpósios e dos resumos. Campo Grande, MS: Sociedade Brasileira de Zootecnia: Embrapa Gado de Corte, 2004. 4 p. FORR 270. 1 CD-ROM. CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| 9. | | PEREIRA, J. M.; REZENDE C. de P.; MAGALHÃES, A. F.; ALVES, B. J. R.; BODDEY, R. M. Altura de pastejo, características do pasto e produção animal em pastagens formadas por três cultivares de Urochloa humidicola, Agrotrópica, v. 34, n. 1, p.59-66, 2022.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 4 |
| Biblioteca(s): Embrapa Agrobiologia. |
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| 10. | | NOBRE, F. C. R.; PEREIRA, J. M. B.; MOTA, N. C. L.; LIMA, R. S. de; MENEZES, R. S. de. Caracterizacao de sistemas e praticas agroflorestais no estado do Acre. In: CONGRESSO BRASILEIRO SOBRE SISTEMAS AGROFLORESTAIS, 1.; ENCONTRO SOBRE SISTEMAS AGROFLORESTAIS NOS PAÍSES DO MERCOSUL, 1., 1994, Porto Velho. Anais. Colombo: EMBRAPA-CNPF, 1994. v. 2, p. 353-360. (EMBRAPA-CNPF. Documentos, 27).| Biblioteca(s): Embrapa Florestas. |
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| 12. | | FERREIRA, G. B.; FONTES, R. L. F.; VENEGAS, V. H. A.; FONTES, M. P. F.; PEREIRA, J. M. N. Interferência de ferro na dosagem de boro no solo com azometina-H em soluções extratoras ácidas. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 37, n. 9, p. 1311-1318, set. 2002 Título em inglês: Interference of iron on soil boron determination with azomethine-H in acid solutions.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 13. | | PEREIRA, J. M.; LINO, J. S.; BUSCHINELLI, C. C. de A.; BARROS, I. de; RODRIGUES, G. S. Integrated farm environmental management and biodiversity conservation: a case study en the Caratinga Biological Station (Minas Gerais State, Brazil). Pesquisa Agropecuária Tropical, Goiânia, v. 40, n. 4, p. 401-413, 2010.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 14. | | PEREIRA, J. M. N.; RAMOS, A. R.; PAVIN, M. E.; LÜDKE, L. F.; GANDER, E. S.; MARCELLINO, L. H. Isolamento e caracterização de genes codificantes para osmotina em biblioteca bac de Theobroma cação. In : ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 12., 2007, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2007. p. 74.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 15. | | SOLIMAN, E. P.; DIAS, T. K. R.; PEREIRA, J. M.; ZACHÉ, B.; BARBOSA, L. R.; ZAUZA, E. A. V.; WILCKEN, C. F. Aspectos reprodutivos de Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae) em diferentes clones de eucalipto. In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 24., 2012, Curitiba. Anais web. Curitiba: SEB: UFPR, 2012. Resumo.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 16. | | SOARES, N. de F. F.; PEREIRA, J. M. de A. T. K.; MELO, N. R. de; SILVA, W. A. da; BASTOS, M. do S. R. Análise do perfil de textura (TPA) de queijos produzidos com leites de cabra e de vaca. In: CONGRESSO NACIONAL DE LATICÍNIOS, 24., 2007, Juiz de Fora, MG. Anais... Juiz de Fora: EPAMIG: Instituto de Laticínios "Candido Tostes", 2007. 6 p.| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 17. | | SOLIMAN, E. P.; PEREIRA, J. M.; MARCHI, L. F.; DIAS, T. K. R.; ZACHÉ, B.; POGETTO, M. H. F. do A. D.; BARBOSA, L. R.; WILCKEN, C. F. Biologia do percevejo-bronzeado Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae) em Eucalyptus camaldulensis. In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 23., 2010, Natal. Anais... Natal: Sociedade Brasileira de Entomologia: Emparn, 2010. CD-ROM. Resumo.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 18. | | SANTOS, C. A. dos; REZENDE, C. de P.; PINHEIRO, E. F. M.; PEREIRA, J. M.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Changes in soil carbon stocks after land-use change from native vegetation to pastures in the Atlantic Forest Region of Brazil. Geoderma, v. 337, p. 394-401, 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agrobiologia. |
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| 19. | | SOLIMAN, E. P.; WILCKEN, C. F.; PEREIRA, J. M.; DIAS, T. K. R.; ZACHÉ, B.; POGETTO, M. H. F. A.; BARBOSA, L. R. Biology of Thaumastocoris peregrinus in different eucalyptus species and hybrids. Phytoparasitica, v. 40, p. 223-230, 2012.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Florestas. |
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| 20. | | URQUIAGA, S.; ALVES, B. J. R.; BODDEY, R. M.; FERREIRA, E.; MIRANDA, C. H. B.; OLIVEIRA, O. C.; PEREIRA, J. M.; REZENDE, C. de P. Caracterização de degradação de pastagens e avaliação de técnicas de recuperação usando-se leguminosas forrageiras. Seropédica: EMBRAPA-CNPAB, 1998. 18 p. (EMBRAPA-CNPAB. Documentos, 66).| Biblioteca(s): Embrapa Agrobiologia. |
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| Registros recuperados : 47 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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