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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Cerrados. |
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Data corrente: |
24/04/2008 |
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Data da última atualização: |
20/10/2009 |
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Tipo da produção científica: |
Documentos |
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Autoria: |
CARVALHO, A. M. de; BUSTAMANTE, M. M. da C. |
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Afiliação: |
Arminda Moreira de Carvalho, CPAC; Mercedes Maria da Cunha Bustamante, UnB. |
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Título: |
Emissões de NO, N2O e CO2 em agroecossistemas do Cerrado. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2007. |
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Páginas: |
26 p. |
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Série: |
(Embrapa Cerrados. Documentos, 188). |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT: In the last 30 years, the Cerrado Biome has suffered very intense conversion of its native vegetation into croplands (Brazilian Savanna). This habitat modification has contributed with 25% and 90% of the total CO2 and N2O anthropogenic emission respectively. Soil preparation (tillage and no-tillage), deposition of crop residues, cultivation of N-fixing species and nitrogen fertilization are management practices that influence trace gas fluxes from soil to atmosphere. Nevertheless, the interaction between such practices and NO, N2O and CO2 fluxes in the Cerrado region is still unclear. Raining events after the dry season results in NO and CO2 pulses. The interaction between nitrogen application-during rain events affects NO and CO2 emissions. The soil in the no-tillage system when under leguminosae shows higher annual emissions of CO2. In the seasonal dry, most of the N2O fluxes values are below the detection limit. Higher NO fluxes are found immediately (5.4 ng NO-N cm-2 h-1) and 3 days (4,8 ng NO-N cm-2 h-1) after N fertilization and irrigation. After the first pulses of NO (5,4 ng NO-N cm-2 H-1 and 4,8 ng NO-N cm-2 h-1), the emission decreases significantly (1.9 ng NO-N cm-2 h-1). Residues of cover plants and nitrogen fertilization associated to raining events affects trace gas fluxes. |
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Palavras-Chave: |
Solo: Levantamento e Mapeamento. |
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Thesagro: |
Carbono; Conservação do Solo; Efeito Estufa; Gás; Manejo do Solo; Matéria Orgânica. |
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Thesaurus Nal: |
carbon; gases; greenhouse effect; organic matter; soil conservation; soil management. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/28953/1/doc_188.pdf
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Marc: |
LEADER 02140nam a2200301 a 4500
001 1572290
005 2009-10-20
008 2007 bl uuuu u0uu1 u #d
100 1 $aCARVALHO, A. M. de
245 $aEmissões de NO, N2O e CO2 em agroecossistemas do Cerrado.
260 $aPlanaltina, DF: Embrapa Cerrados$c2007
300 $a26 p.
490 $a(Embrapa Cerrados. Documentos, 188).
520 $aABSTRACT: In the last 30 years, the Cerrado Biome has suffered very intense conversion of its native vegetation into croplands (Brazilian Savanna). This habitat modification has contributed with 25% and 90% of the total CO2 and N2O anthropogenic emission respectively. Soil preparation (tillage and no-tillage), deposition of crop residues, cultivation of N-fixing species and nitrogen fertilization are management practices that influence trace gas fluxes from soil to atmosphere. Nevertheless, the interaction between such practices and NO, N2O and CO2 fluxes in the Cerrado region is still unclear. Raining events after the dry season results in NO and CO2 pulses. The interaction between nitrogen application-during rain events affects NO and CO2 emissions. The soil in the no-tillage system when under leguminosae shows higher annual emissions of CO2. In the seasonal dry, most of the N2O fluxes values are below the detection limit. Higher NO fluxes are found immediately (5.4 ng NO-N cm-2 h-1) and 3 days (4,8 ng NO-N cm-2 h-1) after N fertilization and irrigation. After the first pulses of NO (5,4 ng NO-N cm-2 H-1 and 4,8 ng NO-N cm-2 h-1), the emission decreases significantly (1.9 ng NO-N cm-2 h-1). Residues of cover plants and nitrogen fertilization associated to raining events affects trace gas fluxes.
650 $acarbon
650 $agases
650 $agreenhouse effect
650 $aorganic matter
650 $asoil conservation
650 $asoil management
650 $aCarbono
650 $aConservação do Solo
650 $aEfeito Estufa
650 $aGás
650 $aManejo do Solo
650 $aMatéria Orgânica
653 $aSolo: Levantamento e Mapeamento
700 1 $aBUSTAMANTE, M. M. da C.
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 1.651 | |
| 163. |  | NOGUEIRA, J. G.; CARVALHO, A. V.; MATTIETTO, R. de A. Obtenção e caracterização físico-química de estruturados de umbu. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA, 18.; SEMINÁRIO DE PÓS-GRADUAÇÃO DA EMBRAPA AMAZÔNIA ORIENTAL, 2., 2014, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental, 2014. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 180. | | BARROS, L. de M.; CARVALHO, A. C. P. P. de; BONGERS, F. J. G.; BAIMA, S. O agronegócio da floricultura no Brasil. In: ALBUQUERQUE, A. C. S.; SILVA, A. G. da. (Ed.). Agricultura tropical: quatro décadas de inovações tecnológicas, institucionais e políticas. Brasília, DF: Embrapa Informação Tecnológica, 2008, v.1 p.881-904| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| Registros recuperados : 1.651 | |
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