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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
27/05/2013 |
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Data da última atualização: |
30/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BRAZ, S. P.; URQUIAGA, S.; SANTOS, C. A. dos; SANTOS, S. dos; PINHEIRO, E. F. M.; JANTALIA, C. P.; BODDEY, R. M. |
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Afiliação: |
UFRRJ; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; UFRRJ; UFRRJ; CLAUDIA POZZI JANTALIA, CNPAB; ROBERT MICHAEL BODDEY, CNPAB. |
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Título: |
Soil carbon stocks under productive and degraded brachiaria pastures in the Brazilian Cerrado. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Soil & Water Management & Conservation, v.77, n. 3, p. 914-928, 2013. |
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DOI: |
10.2136/sssaj2012.0269 |
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Idioma: |
Inglês |
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Palavras-Chave: |
Biomassa microbiana; Carbono do solo; Degraded pastures; Microbial biomass carbon; Pastagem degradada. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00781naa a2200253 a 4500
001 1958920
005 2015-03-30
008 2013 bl uuuu u00u1 u #d
024 7 $a10.2136/sssaj2012.0269$2DOI
100 1 $aBRAZ, S. P.
245 $aSoil carbon stocks under productive and degraded brachiaria pastures in the Brazilian Cerrado.
260 $c2013
653 $aBiomassa microbiana
653 $aCarbono do solo
653 $aDegraded pastures
653 $aMicrobial biomass carbon
653 $aPastagem degradada
700 1 $aURQUIAGA, S.
700 1 $aSANTOS, C. A. dos
700 1 $aSANTOS, S. dos
700 1 $aPINHEIRO, E. F. M.
700 1 $aJANTALIA, C. P.
700 1 $aBODDEY, R. M.
773 $tSoil & Water Management & Conservation$gv.77, n. 3, p. 914-928, 2013.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
17/08/2012 |
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Data da última atualização: |
20/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
BAYER, C.; GOMES, J.; VIEIRA, F. C. B; ZANATTA, J. A.; PICCOLO, M. de C.; DIECKOW, J. |
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Afiliação: |
CIMÉLIO BAYER, UFRGS; JULIANA GOMES, UFRGS; FREDERICO COSTA BEBER VIEIRA, UNIVERSIDADE FEDERAL DO PAMPA; JOSILEIA ACORDI ZANATTA, CNPF; MARISA DE CÁSSIA PICOLLO, CENTRO DE ENERGIA NUCLEAR DA AGRICULTURA; JEFERSON DIECKOW, UFPR. |
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Título: |
Methane emission from soil under long-term no-till cropping systems. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Soil & Tillage Research, v. 124, p. 1-7, 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
Methane (CH4) emission from agricultural soils increases dramatically as a result of deleterious effect of soil disturbance and nitrogen fertilization on methanotrophic organisms; however, few studies have attempted to evaluate the potential of long-term conservation management systems to mitigate CH4 emissions in tropical and subtropical soils. This study aimed to evaluate the long-term effect (>19 years) of no-till grass- and legume-based cropping systems on annual soil CH4 fluxes in a formerly degraded Acrisol in Southern Brazil. Air sampling was carried out using static chambers and CH4 analysis by gas chromatography. Analysis of historical data set of the experiment evidenced a remarkable effect of high C- and N-input cropping systems on the improvement of biological, chemical, and physical characteristics of this no-tilled soil. Soil CH4 fluxes, which represent a net balance between consumption () and production (+) of CH4 in soil, varied from 40 2 to +62 78 mg C m2 h1. Mean weighted contents of ammonium (NH4+–N) and dissolved organic carbon (DOC) in soil had a positive relationship with accumulated soil CH4 fluxes in the post-management period (r2 = 0.95, p = 0.05), suggesting an additive effect of these nutrients in suppressing CH4 oxidation and stimulating methanogenesis, respectively, in legumebased cropping systems with high biomass input. Annual CH4 fluxes ranged from 50 610 to +994 105 g C ha1, which were inversely related to annual biomass-C input (r2 = 0.99, p = 0.003), with the exception of the cropping system containing pigeon pea, a summer legume that had the highest biologically fixed N input (>300 kg ha1 yr1). Our results evidenced a small effect of conservation management systems on decreasing CH4 emissions from soil, despite their significant effect restoring soil quality. We hypothesized that soil CH4 uptake strength has been off-set by an injurious effect of biologically fixed N in legume-based cropping systems on soil methanotrophic microbiota, and by the methanogenesis increase as a result of the O2 depletion in niches of high biological activity in the surface layer of the no-tillage soil. MenosMethane (CH4) emission from agricultural soils increases dramatically as a result of deleterious effect of soil disturbance and nitrogen fertilization on methanotrophic organisms; however, few studies have attempted to evaluate the potential of long-term conservation management systems to mitigate CH4 emissions in tropical and subtropical soils. This study aimed to evaluate the long-term effect (>19 years) of no-till grass- and legume-based cropping systems on annual soil CH4 fluxes in a formerly degraded Acrisol in Southern Brazil. Air sampling was carried out using static chambers and CH4 analysis by gas chromatography. Analysis of historical data set of the experiment evidenced a remarkable effect of high C- and N-input cropping systems on the improvement of biological, chemical, and physical characteristics of this no-tilled soil. Soil CH4 fluxes, which represent a net balance between consumption () and production (+) of CH4 in soil, varied from 40 2 to +62 78 mg C m2 h1. Mean weighted contents of ammonium (NH4+–N) and dissolved organic carbon (DOC) in soil had a positive relationship with accumulated soil CH4 fluxes in the post-management period (r2 = 0.95, p = 0.05), suggesting an additive effect of these nutrients in suppressing CH4 oxidation and stimulating methanogenesis, respectively, in legumebased cropping systems with high biomass input. Annual CH4 fluxes ranged from 50 610 to +994 105 g C ha1, which were inversely related to annual biomass-C input (r2 = 0.99, p... Mostrar Tudo |
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Palavras-Chave: |
Emissão de gás. |
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Thesagro: |
Agricultura; Metano. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/64094/1/Josileia-STR-Methane.pdf
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Marc: |
LEADER 02751naa a2200217 a 4500
001 1931501
005 2015-02-20
008 2012 bl uuuu u00u1 u #d
100 1 $aBAYER, C.
245 $aMethane emission from soil under long-term no-till cropping systems.$h[electronic resource]
260 $c2012
520 $aMethane (CH4) emission from agricultural soils increases dramatically as a result of deleterious effect of soil disturbance and nitrogen fertilization on methanotrophic organisms; however, few studies have attempted to evaluate the potential of long-term conservation management systems to mitigate CH4 emissions in tropical and subtropical soils. This study aimed to evaluate the long-term effect (>19 years) of no-till grass- and legume-based cropping systems on annual soil CH4 fluxes in a formerly degraded Acrisol in Southern Brazil. Air sampling was carried out using static chambers and CH4 analysis by gas chromatography. Analysis of historical data set of the experiment evidenced a remarkable effect of high C- and N-input cropping systems on the improvement of biological, chemical, and physical characteristics of this no-tilled soil. Soil CH4 fluxes, which represent a net balance between consumption () and production (+) of CH4 in soil, varied from 40 2 to +62 78 mg C m2 h1. Mean weighted contents of ammonium (NH4+–N) and dissolved organic carbon (DOC) in soil had a positive relationship with accumulated soil CH4 fluxes in the post-management period (r2 = 0.95, p = 0.05), suggesting an additive effect of these nutrients in suppressing CH4 oxidation and stimulating methanogenesis, respectively, in legumebased cropping systems with high biomass input. Annual CH4 fluxes ranged from 50 610 to +994 105 g C ha1, which were inversely related to annual biomass-C input (r2 = 0.99, p = 0.003), with the exception of the cropping system containing pigeon pea, a summer legume that had the highest biologically fixed N input (>300 kg ha1 yr1). Our results evidenced a small effect of conservation management systems on decreasing CH4 emissions from soil, despite their significant effect restoring soil quality. We hypothesized that soil CH4 uptake strength has been off-set by an injurious effect of biologically fixed N in legume-based cropping systems on soil methanotrophic microbiota, and by the methanogenesis increase as a result of the O2 depletion in niches of high biological activity in the surface layer of the no-tillage soil.
650 $aAgricultura
650 $aMetano
653 $aEmissão de gás
700 1 $aGOMES, J.
700 1 $aVIEIRA, F. C. B
700 1 $aZANATTA, J. A.
700 1 $aPICCOLO, M. de C.
700 1 $aDIECKOW, J.
773 $tSoil & Tillage Research$gv. 124, p. 1-7, 2012.
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