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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
09/08/2004 |
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Data da última atualização: |
09/08/2004 |
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Autoria: |
OLIVEIRA, O. C. de; OLIVEIRA, I. P. de; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
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Título: |
Chemical and biological indicators of decline/degradation of Brachiaria pastures in the Brazilian cerrado. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Agriculture Ecosystems & Environment, Amsterdam, v. 103, p. 289-300, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
Some years after their installation, areas of planted to Brachiaria and other African grasses in the Brazilian savanna ("Cerrado") region show a continuous decline in forage and productivity. If no remedial measures are taken, plant cover decreases, the areas become invaded by weeds and the soil becomes compacted. In Brazil these pastures are described as degraded ("degradada") and this phenomenon has become the major limiting factor to extensive beef production. However, this process is not yet well understood. A series of evaluations were implemented in representative beef production areas in the Cerrado region in order to determine which chemical and biological parameters could best be used as indicators of degradation. Choronosequences of Brachiaria brizantha and Brachiaria decumbens pastures were used in this study. In degraded pastures the lowest quantities of plant litter and organic matter light fraction were observed, which are important pools in nutrient cycling. Soil microbial biomass carbon decreased as pastures age increased. Soil fertility and plant tissue analyses, and potentially mineralisable nitrogen were not suitable indicators of degradation. Physical fractionation by flotation of soil organic matter (SOM) macro-aggregates (>150 mm) differentiated very clearly more recently reformed B. brizantha pastures from a 20-year-old degraded B. decumbens pastures but this technique a lot of time and effort and did not show any very significant changes with age of the reformed pastures. The results of this suggest that the most reliable and simple indicator of pasture decline was found to be the rate of litter deposition, followed by microbial biomass C and pasture regrowth after cutting. MenosSome years after their installation, areas of planted to Brachiaria and other African grasses in the Brazilian savanna ("Cerrado") region show a continuous decline in forage and productivity. If no remedial measures are taken, plant cover decreases, the areas become invaded by weeds and the soil becomes compacted. In Brazil these pastures are described as degraded ("degradada") and this phenomenon has become the major limiting factor to extensive beef production. However, this process is not yet well understood. A series of evaluations were implemented in representative beef production areas in the Cerrado region in order to determine which chemical and biological parameters could best be used as indicators of degradation. Choronosequences of Brachiaria brizantha and Brachiaria decumbens pastures were used in this study. In degraded pastures the lowest quantities of plant litter and organic matter light fraction were observed, which are important pools in nutrient cycling. Soil microbial biomass carbon decreased as pastures age increased. Soil fertility and plant tissue analyses, and potentially mineralisable nitrogen were not suitable indicators of degradation. Physical fractionation by flotation of soil organic matter (SOM) macro-aggregates (>150 mm) differentiated very clearly more recently reformed B. brizantha pastures from a 20-year-old degraded B. decumbens pastures but this technique a lot of time and effort and did not show any very significant changes with age of t... Mostrar Tudo |
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Palavras-Chave: |
Brachiaria grass. |
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Thesagro: |
Brachiaria; Capim Brachiaria; Cerrado; Pastagem; Vegetação. |
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Thesaurus Nal: |
pastures; savannas; vegetation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02510naa a2200277 a 4500
001 1626284
005 2004-08-09
008 2004 bl --- 0-- u #d
100 1 $aOLIVEIRA, O. C. de
245 $aChemical and biological indicators of decline/degradation of Brachiaria pastures in the Brazilian cerrado.
260 $c2004
520 $aSome years after their installation, areas of planted to Brachiaria and other African grasses in the Brazilian savanna ("Cerrado") region show a continuous decline in forage and productivity. If no remedial measures are taken, plant cover decreases, the areas become invaded by weeds and the soil becomes compacted. In Brazil these pastures are described as degraded ("degradada") and this phenomenon has become the major limiting factor to extensive beef production. However, this process is not yet well understood. A series of evaluations were implemented in representative beef production areas in the Cerrado region in order to determine which chemical and biological parameters could best be used as indicators of degradation. Choronosequences of Brachiaria brizantha and Brachiaria decumbens pastures were used in this study. In degraded pastures the lowest quantities of plant litter and organic matter light fraction were observed, which are important pools in nutrient cycling. Soil microbial biomass carbon decreased as pastures age increased. Soil fertility and plant tissue analyses, and potentially mineralisable nitrogen were not suitable indicators of degradation. Physical fractionation by flotation of soil organic matter (SOM) macro-aggregates (>150 mm) differentiated very clearly more recently reformed B. brizantha pastures from a 20-year-old degraded B. decumbens pastures but this technique a lot of time and effort and did not show any very significant changes with age of the reformed pastures. The results of this suggest that the most reliable and simple indicator of pasture decline was found to be the rate of litter deposition, followed by microbial biomass C and pasture regrowth after cutting.
650 $apastures
650 $asavannas
650 $avegetation
650 $aBrachiaria
650 $aCapim Brachiaria
650 $aCerrado
650 $aPastagem
650 $aVegetação
653 $aBrachiaria grass
700 1 $aOLIVEIRA, I. P. de
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tAgriculture Ecosystems & Environment, Amsterdam$gv. 103, p. 289-300, 2004.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Biblioteca |
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| Registros recuperados : 51 | |
| 23. |  | VIERA-VARGAS, M. S.; OLIVEIRA, O. C. de; SOUTO, C. M.; CADISCH, G.; URQUIAGA, S.; BODDEY, R. M. Use of different 15N labelling techniques to quantify the contribution of biological N2 fixation to legumes. Soil Biology and Biochemistry, Oxford, v. 27, n. 9, p. 1185-1192, 1995.| Biblioteca(s): Embrapa Agrobiologia. |
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| 25. | | FERREIRA, E.; RESENDE, A.; QUESADA, D.; GALINDO, L.; MACEDO, R.; TARRÉ, R.; CAMPOS, D. V.; OLIVEIRA, O. C. de; ALVES, B. J. R.; BODDEY, R. M.; URQUIAGA, S. Avaliação do consumo de gramíneas e leguminosas por meio das fezes de bovinos, no período seco em condições de pastagens consorciadas na região de Uberlândia-MG. Seropédica: EMBRAPA-CNPAB, 1999. 4 p. (EMBRAPA-CNPAB. Pesquisa em Andamento, 29).| Biblioteca(s): Embrapa Agrobiologia. |
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| 26. | | OLIVEIRA, O. C. de; MIRANDA, C. H. B.; RESENDE, A.; FERREIRA, E.; ALVES, Bruno J. R.; URQUIAGA, Segundo; BODDEY, Robert M. Balanco de nitrogenio em um planossolo sob cultivo de diferentes especies de Brachiaria spp. In: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 26., jul. 1997, Rio de Janeiro. Resumos... Rio de Janeiro: Sociedade Brasileira de Ciencia do Solo, 1997. Secao Tematica 4. 1 CD-ROM. Mini-resumo impresso na pagina 278.| Biblioteca(s): Embrapa Agrobiologia. |
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| 27. | | OLIVEIRA, O. C. de; OLIVEIRA, I. P. de; FERREIRA, E.; ALVES, Bruno J. R.; CADISCH, G.; MIRANDA, C. H. B.; VILELA, L.; BODDEY, Robert M.; URQUIAGA, Segundo. A baixa disponibilidade de nutrientes do solo como uma causa potencial da degradacao de pastagens no cerrado brasileiro. In: SIMPOSIO NACIONAL DE RECUPERACAO DE AREAS DEGRADADAS - SINRAD, 3., maio 1997, Ouro Preto. Anais... Vicosa: SOBRADE; UFV/DPS/DEF, 1997. p.110-117.| Biblioteca(s): Embrapa Agrobiologia. |
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| 28. | | MIELE, M.; ALMEIDA, M. M. T. B.; MONTICELLI, C. J.; OLIVEIRA, O. C. de; BOFF, J. A.; PALHARES, J. C. P.; SANDI, A. J.; CARDOSO, L. S. Caracterização da suinocultura no Brasil a partir do censo agropecuário 2006 do IBGE. Concórdia: Embrapa Suínos e Aves, 2013. 149 p. (Embrapa Suínos e Aves. Documentos, 160).| Biblioteca(s): Embrapa Suínos e Aves. |
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| 29. | | FERREIRA, E.; LOPES, W.; MOTA, R. S. S.; TARRE, R.; MACEDO, R.; OLIVEIRA, O. C. de; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Ciclagem de nitrogênio das fezes bovinas no periodo seco, em pastagem de Brachiaria decumbens Stapf. Prain. Fl., localizada no ecossistema de cerrado em Santo Antonio de Goias-Goias. In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 13., 2000, Ilhéus. Resumos... Ilhéus: CEPLAC/CEPEC, 2000. p. 791-792. CD ROM.| Biblioteca(s): Embrapa Agrobiologia. |
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| 30. | | URQUIAGA, S.; ALVES, B. J. R.; BODDEY, R. M.; FERREIRA, E.; MIRANDA, C. H. B.; OLIVEIRA, O. C. de; FERREIRA, J. M.; REZENDE, C. de P. Caracterizacao de degradacao de pastagens e avaliacao de tecnicas de recuperacao usando-se leguminosas forragerias. Seropedica: EMBRAPA-CNPAB, 1998. 21p. (EMBRAPA-CNPAB. Documentos, 66). CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| 31. | | BODDEY, R. M.; OLIVEIRA, O. C. de; URQUIAGA, S.; REIS, V. M.; OLIVARES, F. L. de; BALDANI, V. L. D.; DOBEREINER, Johanna. Biological nitrogen fixation associated with sugar cane and rice: Contributions and prospects for improvement. Plant and Soil, Netherlands, v. 174, p. 195-209, 1995.| Biblioteca(s): Embrapa Agrobiologia. |
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| 32. | | REIS, V. M.; REIS JÚNIOR, F. B. dos; QUESADA, D. M.; OLIVEIRA, O. C. de; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Biological nitrogen fixation associated with tropical pasture grasses. Australian Journal of Plant Physiology, Victoria, v. 28, n. 9, p. 837-844, 2001.| Biblioteca(s): Embrapa Agrobiologia. |
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| 33. | | FASIABEN, M. do C. R.; OLIVEIRA, S. R. de M.; MORAES, A. S.; ALMEIDA, M. M. T. B.; OLIVEIRA, O. C. de; EUSÉBIO, G. dos S. Diferenciação e caracterização de municípios produtores de bovinos de corte no bioma Mata Atlântica segundo o Censo Agropecuário 2017. In: CONGRESSO BRASILEIRO DE AGROINFORMÁTICA, 13., 2021, Bagé. Anais... Bagé: Unipampa, 2021. p. 80-89. Organizado por Ana Paula Lüdtke Ferreira.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 34. | | FASIABEN, M. do C. R.; OLIVEIRA, S. R. de M.; MORAES, A. S.; ALMEIDA, M. M. T. B.; OLIVEIRA, O. C. de; EUSÉBIO, G. dos S. Diferenciação e caracterização de municípios produtores de bovinos de corte no bioma Mata Atlântica segundo o Censo Agropecuário 2017. In: CONGRESSO BRASILEIRO DE AGROINFORMÁTICA, 13., 2021, Bagé. Anais [...]. Bagé: Unipampa, 2021. p. 80-89. Organizado por Ana Paula Lüdtke Ferreira. SBIAgro 2021.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agricultura Digital. |
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| 35. | | FASIABEN, M. do C. R.; OLIVEIRA, S. R. de M.; MORAES, A. S.; ALMEIDA, M. M. T. B.; OLIVEIRA, O. C. de; EUSÉBIO, G. dos S. Diferenciação e caracterização de municípios produtores de bovinos de corte no bioma Mata Atlântica segundo o Censo Agropecuário 2017. Revista Brasileira de Computação Aplicada, v. 14, n. 2, p. 67-74, 2022.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Agricultura Digital; Embrapa Soja. |
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| 36. | | FASIABEN, M. do C. R.; LIMA, H. P. de; OLIVEIRA, S. R. de M.; ALMEIDA, M. M. T. B.; OLIVEIRA, O. C. de; MORAES, A. S. Diferenciação e caracterização de municípios produtores de bovinos de corte do Bioma Pampa segundo o Censo Agropecuário 2017. In: CONGRESSO BRASILEIRO DE AGROINFORMÁTICA, 14., 2023, Natal. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2023. p. 135-142. SBIAgro 2023.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agricultura Digital; Embrapa Soja. |
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| 37. | | OLIVEIRA, O. C. de; OLIVEIRA, I. P. de; FERREIRA, E.; ALVES, B. J. R.; MIRANDA, C. H. B.; VILELA, L.; URQUIAGA, S.; BODDEY, R. M. Response of degraded pastures in the Brazilian cerrado to chemical fertilization. Pasturas Tropicales, Cali, v. 23, n. 1, p.14-17, 2001.| Biblioteca(s): Embrapa Agrobiologia. |
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| 38. | | BODDEY, R. M.; JANTALIA, C. P.; MACEDO, M. O.; OLIVEIRA, O. C. de; RESENDE, A. S. de; ALVES, B. J. R.; URQUIAGA, S. Potential of carbon sequestration in soils of the Atlantic forest region of Brazil. In: LAL, R.; CERRI, C. C.; BERNOUX, M.; ETCHEVERS, J.; CERRI, E. (Ed.). Carbon sequestration in soils of Latin America. New York: The Haworth, 2006. p. 305-345.| Biblioteca(s): Embrapa Agrobiologia. |
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| 39. | | FERREIRA, E.; QUESADA, D. M.; RESENDE, A. S. de; OLIVEIRA, O. C. de; GALINDO, L. L: G.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Utilização de nitrogênio de urina bovina por uma pastagem de Brachiaria humidicola. Seropédica: EMBRAPA-CNPAB, 1998. 3 p. (EMBRAPA-CNPAB. Pesquisa em Andamento, 11).| Biblioteca(s): Embrapa Agrobiologia. |
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| Registros recuperados : 51 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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