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Registros recuperados : 126 | |
9. | | CARVALHO, A. M.; BUSTAMANTE, M. M. C. Decomposição de resíduos vegetais e efeitos em carbono, nitrogênio e fósforo do solo sob sistemas convencional e plantio direto. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 28.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 12.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 10.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 7., 2008, Londrina. FertBio 2008: desafios para o uso do solo com eficiência e qualidade ambiental: anais. Londrina: SBCS: Embrapa Soja: IAPAR: UEL, 2008. 1 CD-ROM. Biblioteca(s): Embrapa Cerrados. |
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18. | | BATISTELLA, M.; ARTAXO, P.; NOBRE, C.; BUSTAMANTE, M.; LUIZÃO, F. Results from LBA and vision for future Amazonian research. In: KELLER, M.; BUSTAMANTE, M.; GASH, J.; DIAS, P. S. (Ed.). Amazonia and global change. Washington: American Geophysical Union, 2009. p. 555-563 (Geophysical Monograph Series, 186) Biblioteca(s): Embrapa Territorial. |
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Registros recuperados : 126 | |
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Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
24/04/2008 |
Data da última atualização: |
20/10/2009 |
Tipo da produção científica: |
Documentos |
Autoria: |
CARVALHO, A. M. de; BUSTAMANTE, M. M. da C. |
Afiliação: |
Arminda Moreira de Carvalho, CPAC; Mercedes Maria da Cunha Bustamante, UnB. |
Título: |
Emissões de NO, N2O e CO2 em agroecossistemas do Cerrado. |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2007. |
Páginas: |
26 p. |
Série: |
(Embrapa Cerrados. Documentos, 188). |
Idioma: |
Português |
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. |
Palavras-Chave: |
Solo: Levantamento e Mapeamento. |
Thesagro: |
Carbono; Conservação do Solo; Efeito Estufa; Gás; Manejo do Solo; Matéria Orgânica. |
Thesaurus NAL: |
carbon; gases; greenhouse effect; organic matter; soil conservation; soil management. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/28953/1/doc_188.pdf
|
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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