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| Registros recuperados : 16 | |
| 1. |  | RESENDE, A. S. de; TARRE, R. M.; REZENDE, C. de P.; BODDEY, R. M.; URQUIAGA, S.; ALVES, B. J. R. Quantificacao da FBN em Desmodium ovalifolium crescido no campo, utilizando-se as tecnicas de abundancia relativa de ureidos e de diluicao isotopica de 15N. In: CONGRESSO LATINO AMERICANO DE CIENCIA DO SOLO, 13.; REUNIAO BRASILEIRA DE BIOLOGIA DO SOLO, 1.; SIMPOSIO BRASILEIRO SOBRE MICROBIOLOGIA DO SOLO, 4., ago. 1996, Aguas de Lindoia-SP. Resumos... Aguas de Lindoia, SP: USP / SLCS / SBCS, 1996. Comissao 3. Trabalho n.79. 1 CD-ROM.| Biblioteca(s): Embrapa Agrobiologia. |
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| 4. | | TARRÉ, R. M.; MACEDO, R. B.; CANTARUTTI, R. B.; REZENDE, C. de P.; PEREIRA, J. M.; FERREIRA, E.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Carbon accumulation in soils under brachiaria pastures in the Atlantic Rorest region of the South of Bahia, Brazil. In: INTERNATIONAL GRASSLAND CONGRESS PROCEEDINGS, 24; INTERNATIONAL RANGELAND CONGRESS, 11, 2021 kentucky. Sustainable Use of Grassland and Rangeland Resources for Improved Livelihoods: proceeding...kentucky: University of kentucky. 2022.| Biblioteca(s): Embrapa Agrobiologia. |
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| 5. | | BODDEY, R. M.; TARRÉ, R. M.; MACEDO, R. B.; REZENDE, C. de P.; PEREIRA, J. M.; ALVES, B. J. R.; URQUIAGA, S. Cycling of N and P in grass-alone (Brachiaria) and mixed grass/legume (Brachiaria/ desmodium ovalifolium) grazed pastures in the Atlantic Forest Region of Brazil. In: INTERNATIONAL GRASSLAND CONGRESS PROCEEDINGS, 24; INTERNATIONAL RANGELAND CONGRESS, 11, 2021 kentucky. Sustainable Use of Grassland and Rangeland Resources for Improved Livelihoods: proceeding...kentucky: University of kentucky, 2022.| Biblioteca(s): Embrapa Agrobiologia. |
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| 6. | | TARRÉ, R. M.; MACEDO, R.; REZENDE, C. de P.; PEREIRA, J. M.; URQUIAGA, S.; BODDEY, R. M.; ALVES, B. J. R. Cycling of P in mixed grass/legume and grass alone Brachiaria pastures in the Atlantic forest region of Brazil. In: INTERNATIONAL SYMPOSIUM PHOSPHORUS DYNAMICS IN SOIL-PLANT CONTINUUM, 3rd., 2006, Uberlândia. Proceedings... Uberlândia: Embrapa Milho e Sorgo, 2006. p. 206-207. Edited by: Vera M. C. Alves, Claudia T. Guimarães, Jurandir V. de Magalhães, Robert E. Schaffert, Antônio Marcos Coelho, Antônio F. de Castro Bahia Filho, Derli P. Santana.| Biblioteca(s): Embrapa Agrobiologia. |
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| 7. | | ALVES, B. J. R.; REZENDE, C. de P.; RESENDE, A. S.; MACEDO, R.; TARRE, R. M.; URQUIAGA, S.; BODDEY, R. M. Estimation of N2 fixation in Desmodium ovalifolium from the relative ureide abundance of stem solutes: Comparison with the 15N-dilution and an in situ soil core technique. Nutrient Cycling in Agroecosystems, v. 56, p. 177-193, 2000.| Biblioteca(s): Embrapa Agrobiologia. |
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| 8. | | MACEDO R.; TARRÉ, R. M.; FERREIRA, E.; REZENDE, C. de P.; PEREIRA, J. M.; CADISCH, G.; COSTA, J. R.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Forage intake and botanical composition of feed for cattle fed Brachiaria/legume mixtures. Sci. Agric., Piracicaba, v. 67, n. 4, p.384-392.| Biblioteca(s): Embrapa Agrobiologia. |
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| 9. | | CANTARUTTI, R. B.; TARRÉ, R. M.; MACEDO, R. B.; REZENDE, C. de P.; PEREIRA, J. M.; FERREIRA, E.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Forage legume presence and grazing intensity effect on nitrogen dynamics in brachiaria pastures in the South of Bahia, Brazil In: INTERNATIONAL GRASSLAND CONGRESS PROCEEDINGS, 24; INTERNATIONAL RANGELAND CONGRESS, 11, 2021 kentucky. Sustainable Use of Grassland and Rangeland Resources for Improved Livelihoods: proceeding...kentucky: University of kentucky, 2022.| Biblioteca(s): Embrapa Agrobiologia. |
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| 10. | | MATOS, P. S.; SILVA, C. F. da; PEREIRA, M. G.; SILVA, E. M. R. da; TARRÉ, R. M.; FRANCO, A. L. C.; ZONTA, E. Short-term modifications of mycorrhizal fungi, glomalin and soil attributes in a tropical agroforestry. Acta Oecologica, v. 114, 103815, May 2022.| Biblioteca(s): Embrapa Agrobiologia. |
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| 12. | | TARRÉ, R. M.; MACEDO, R.; REZENDE, C. de P.; RESENDE, A. S. de; RESENDE, A. S.; URQUIAGA, S.; ALVES, B. J. R. Variação sazonal da FBN em pastagem de Desmodium ovalifolium consorciada com Brachiaria humidicola, estimada pela abundância relativa de ureídos. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 33., 1996, Fortaleza. Forragicultura: anais. Fortaleza: SBZ, 1996. v. 2, p. 197-199.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 13. | | BODDEY, R. M.; ALVES, B. J. R.; URQUIAGA, S.; FERREIRA, E.; MACEDO, R. O.; OLIVEIRA, O. C.; PEREIRA, J. M.; REZENDE, C. de P.; TARRÉ, R. M.; VILELA, L. Avaliação do impacto da introdução de leguminosas forrageiras na produção e sustentabilidade de pastagens de Brachiaria através de estudos do ciclo de N. Seropédica: EMBRAPA-CNPAB, 1998. 9 p. (EMBRAPA-CNPAB. Documentos, 67).| Biblioteca(s): Embrapa Agrobiologia; Embrapa Agropecuária Oeste; Embrapa Rondônia; Embrapa Unidades Centrais. |
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| 14. | | BODDEY, R. M.; MACEDO, R.; TARRÉ, R. M.; FERREIRA, E.; OLIVEIRA, O. C. de; REZENDE, C. de P.; CANTARUTTI, R. B.; PEREIRA, J. M.; ALVES, B. J. R.; URQUIAGA, S. Nitrogen cycling in Brachiaria pastures: the key to understanding the process of pasture decline. Agriculture Ecosystems & Environment, Amsterdam, v. 103, p. 389-403, 2004.| Biblioteca(s): Embrapa Agrobiologia. |
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| 15. | | RESENDE, C. de P.; CANTARUTTI, R. B.; PEREIRA, J. M.; SANTANA, J. B.; MACEDO, R. de O.; TARRÉ, R. M.; RICHTER, M.; FERREIRA, E.; CADISCH, G.; OLIVEIRA, O. C. de; RESENDE, A. S. de; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Avaliação da sustentabilidade de sistemas agrícolas através de estudos do ciclo de nitrogênio. Seropédica: EMBRAPA-CNPAB, 1996. 11 p. (EMBRAPA-CNPAB. Pesquisa em Andamento, 2).| Biblioteca(s): Embrapa Agrobiologia. |
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| 16. | | RESENDE, C. de P.; CANTARUTTI, R. B.; PEREIRA, J. M.; SANTANA, J. R.; MACEDO, R. de O.; TARRÉ, R. M.; RICHTER, M.; FERREIRA, E.; GADISH, G.-, OLIVEIRA, O. C. de; RESENDE, A. S. de; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Avaliação do impacto da introdução de leguminosas forrageiras na sustentabilidade de pastagens de gramíneas através de estudos do ciclo de nitrogênio. Seropédica: EMBRAPA-CNPAB, 1997. 11 f. (EMBRAPA-CNPAB. Pesquisa em Andamento, 2).| Biblioteca(s): Embrapa Agropecuária Oeste; Embrapa Unidades Centrais. |
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| Registros recuperados : 16 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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: |
BODDEY, R. M.; MACEDO, R.; TARRÉ, R. M.; FERREIRA, E.; OLIVEIRA, O. C. de; REZENDE, C. de P.; CANTARUTTI, R. B.; PEREIRA, J. M.; ALVES, B. J. R.; URQUIAGA, S. |
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Título: |
Nitrogen cycling in Brachiaria pastures: the key to understanding the process of pasture decline. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Agriculture Ecosystems & Environment, Amsterdam, v. 103, p. 389-403, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
In the tropical regions of Brazil there are at leas 80 million ha Mha of pastures planted to grasses introduced from Africa, principaly Brachiaria spp. It is estamated at least half of theses pastures are degraded, that is, support very low stocking rates, show low plant cover, are invaded by-non-palatable native species and often densely populated with termite mounds. The main causes of the process of pature decline are lack of maintenance fertilisation and excessively high animal stocking rates. In this study the of increasing stockingrate on the fluxes of nitrogen N though the animal (forage consumiption, production of faeces and urine) and through the plant (growth, senescence) pathways were studied on Brachiaria humidicola pastures grazed by Zebu beef cattle in the Atlantic fores region of south of (Brazil). As stocking rate increased from 2 to 4animals ha -1, live weight gain per animal decreased from 153 to 120 kg per animal per year but overall weight gain per hectare increased from 305 to 360 kg per vear. Nitrogen exported in the animal weight gain only increased from 7.3 to 8.6 kg N ha-1, but the pathways of Ncycling were radically changed. Increasing the stocking rate from 2 to 4 animal ha-1, increased total Nconsumed by the animal from 94 to 158 kb ha-1 per year, and that deposited in plant litter decreased from 170 to 105 kg ha-1.This resulted in increases in N deposited as urine and dung in the paddocks from 50 to 90 and 37 to 59 kg ha-1, respectively. A large proportion of the excretions were deposited in rest ares and around drinking troughs where the grass was so trampled that it coud not take advantage of thisN, and other nutrients. Data from complementary studies showed that N losses from urine could be between 35 and 80%, being much higher in without vegetation. Weconclude that decline is hastened by increasing stocking rates because of these losses of N and decrease in N nutrients available for grass growth. MenosIn the tropical regions of Brazil there are at leas 80 million ha Mha of pastures planted to grasses introduced from Africa, principaly Brachiaria spp. It is estamated at least half of theses pastures are degraded, that is, support very low stocking rates, show low plant cover, are invaded by-non-palatable native species and often densely populated with termite mounds. The main causes of the process of pature decline are lack of maintenance fertilisation and excessively high animal stocking rates. In this study the of increasing stockingrate on the fluxes of nitrogen N though the animal (forage consumiption, production of faeces and urine) and through the plant (growth, senescence) pathways were studied on Brachiaria humidicola pastures grazed by Zebu beef cattle in the Atlantic fores region of south of (Brazil). As stocking rate increased from 2 to 4animals ha -1, live weight gain per animal decreased from 153 to 120 kg per animal per year but overall weight gain per hectare increased from 305 to 360 kg per vear. Nitrogen exported in the animal weight gain only increased from 7.3 to 8.6 kg N ha-1, but the pathways of Ncycling were radically changed. Increasing the stocking rate from 2 to 4 animal ha-1, increased total Nconsumed by the animal from 94 to 158 kb ha-1 per year, and that deposited in plant litter decreased from 170 to 105 kg ha-1.This resulted in increases in N deposited as urine and dung in the paddocks from 50 to 90 and 37 to 59 kg ha-1, respectively. A larg... Mostrar Tudo |
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Palavras-Chave: |
Brcahiaria grass; Cycling; Litters; Nitrogen cycle in ecosystems. |
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Thesagro: |
Brachiaria; Brachiaria Humidicola; Capim Brachiaria; Ciclo do Nitrogênio; Feno; Pastagem. |
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Thesaurus NAL: |
pastures. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02972naa a2200361 a 4500
001 1624696
005 2004-08-09
008 2004 bl --- 0-- u #d
100 1 $aBODDEY, R. M.
245 $aNitrogen cycling in Brachiaria pastures$bthe key to understanding the process of pasture decline.
260 $c2004
520 $aIn the tropical regions of Brazil there are at leas 80 million ha Mha of pastures planted to grasses introduced from Africa, principaly Brachiaria spp. It is estamated at least half of theses pastures are degraded, that is, support very low stocking rates, show low plant cover, are invaded by-non-palatable native species and often densely populated with termite mounds. The main causes of the process of pature decline are lack of maintenance fertilisation and excessively high animal stocking rates. In this study the of increasing stockingrate on the fluxes of nitrogen N though the animal (forage consumiption, production of faeces and urine) and through the plant (growth, senescence) pathways were studied on Brachiaria humidicola pastures grazed by Zebu beef cattle in the Atlantic fores region of south of (Brazil). As stocking rate increased from 2 to 4animals ha -1, live weight gain per animal decreased from 153 to 120 kg per animal per year but overall weight gain per hectare increased from 305 to 360 kg per vear. Nitrogen exported in the animal weight gain only increased from 7.3 to 8.6 kg N ha-1, but the pathways of Ncycling were radically changed. Increasing the stocking rate from 2 to 4 animal ha-1, increased total Nconsumed by the animal from 94 to 158 kb ha-1 per year, and that deposited in plant litter decreased from 170 to 105 kg ha-1.This resulted in increases in N deposited as urine and dung in the paddocks from 50 to 90 and 37 to 59 kg ha-1, respectively. A large proportion of the excretions were deposited in rest ares and around drinking troughs where the grass was so trampled that it coud not take advantage of thisN, and other nutrients. Data from complementary studies showed that N losses from urine could be between 35 and 80%, being much higher in without vegetation. Weconclude that decline is hastened by increasing stocking rates because of these losses of N and decrease in N nutrients available for grass growth.
650 $apastures
650 $aBrachiaria
650 $aBrachiaria Humidicola
650 $aCapim Brachiaria
650 $aCiclo do Nitrogênio
650 $aFeno
650 $aPastagem
653 $aBrcahiaria grass
653 $aCycling
653 $aLitters
653 $aNitrogen cycle in ecosystems
700 1 $aMACEDO, R.
700 1 $aTARRÉ, R. M.
700 1 $aFERREIRA, E.
700 1 $aOLIVEIRA, O. C. de
700 1 $aREZENDE, C. de P.
700 1 $aCANTARUTTI, R. B.
700 1 $aPEREIRA, J. M.
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
773 $tAgriculture Ecosystems & Environment, Amsterdam$gv. 103, p. 389-403, 2004.
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