| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agrobiologia. |
|
Data corrente: |
02/08/2007 |
|
Data da última atualização: |
18/03/2015 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
DENEF, K.; ZOTARELLI, L.; BODDEY, R. M.; SIX, J. |
|
Afiliação: |
Karolien Denef, Colorado State University; Lincoln Zotarelli; Robert Michael Boddey, Embrapa Agrobiologia; Johan Six, University of California Davis. |
|
Título: |
Microaggregate-associated carbon as a diagnostic fraction for management-induced changes in soil organic carbon in two oxisols. |
|
Ano de publicação: |
2007 |
|
Fonte/Imprenta: |
Soil Biology & Biochemistry, Oxford, v. 39, n. 5, p. 1165-1172, may 2007. |
|
Idioma: |
Inglês |
|
Notas: |
Parceria: Colorado State University, Ghent University, University of Florida, University of California |
|
Conteúdo: |
Carbon stabilization by macroaggregate-occluded microaggregates (Mm) has been proposed as a principal mechanism for long-term soil organic carbon (SOC) sequestration in temperate alternative agricultural and (af)forested systems. The aim of this study was to evaluate the importance of the Mm fraction for long-term C stabilization in Oxisols and to validate its diagnostic properties for total SOC changes upon changes in land use. Soil samples were taken from the 0?5 and 5?20 cm soil layers of native forest vegetation (NV), conventional tillage (CT) and no-tillage (NT) systems at an experimental site near Passo Fundo and one near Londrina in Southern Brazil. After aggregate-size separations by wet-sieving, macroaggregate-occluded water-stable microaggregates (53?250 ?m) (Mm) were isolated from large (>2000 ?m) and small (>250 ?m) macroaggregates. Particulate organic matter located inside the Mm (intra-Mm-POM) and the mineral fraction (< 53 ?m) associated with the Mm (mineral-Mm) were separated from the POM fraction located outside the Mm (inter-Mm-POM) by density flotation followed by mechanical dispersion. Sand-free Mm-C concentrations on a macroaggregate basis were generally greater under NV and NT compared to CT in the 0?5 cm depth at both sites. Our findings support the importance of Mm (especially the mineral-Mm fraction) as long-term C-stabilization sites in highly weathered tropical soils under sustainable agricultural and natural systems. At both sites, significant differences in total SOC stocks (g C m-2) among different land use systems were always accompanied by parallel Mm-C stock differences. Though total SOC did not differ among land use systems in the 0?20 cm depth at both sites, Mm-C stocks were greater under NT compared to the CT treatment in the 0?20 cm depth at the Londrina site. We concluded that in these highly weathered tropical soils the Mm-C fraction is a more responsive fraction to management changes than total SOC and represents a diagnostic fraction for present as well as potential total SOC changes upon land-use change. MenosCarbon stabilization by macroaggregate-occluded microaggregates (Mm) has been proposed as a principal mechanism for long-term soil organic carbon (SOC) sequestration in temperate alternative agricultural and (af)forested systems. The aim of this study was to evaluate the importance of the Mm fraction for long-term C stabilization in Oxisols and to validate its diagnostic properties for total SOC changes upon changes in land use. Soil samples were taken from the 0?5 and 5?20 cm soil layers of native forest vegetation (NV), conventional tillage (CT) and no-tillage (NT) systems at an experimental site near Passo Fundo and one near Londrina in Southern Brazil. After aggregate-size separations by wet-sieving, macroaggregate-occluded water-stable microaggregates (53?250 ?m) (Mm) were isolated from large (>2000 ?m) and small (>250 ?m) macroaggregates. Particulate organic matter located inside the Mm (intra-Mm-POM) and the mineral fraction (< 53 ?m) associated with the Mm (mineral-Mm) were separated from the POM fraction located outside the Mm (inter-Mm-POM) by density flotation followed by mechanical dispersion. Sand-free Mm-C concentrations on a macroaggregate basis were generally greater under NV and NT compared to CT in the 0?5 cm depth at both sites. Our findings support the importance of Mm (especially the mineral-Mm fraction) as long-term C-stabilization sites in highly weathered tropical soils under sustainable agricultural and natural systems. At both sites, significant dif... Mostrar Tudo |
|
Palavras-Chave: |
Forest; Soil organic. |
|
Thesagro: |
Floresta; Solo Orgânico. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02818naa a2200217 a 4500
001 1629236
005 2015-03-18
008 2007 bl uuuu u00u1 u #d
100 1 $aDENEF, K.
245 $aMicroaggregate-associated carbon as a diagnostic fraction for management-induced changes in soil organic carbon in two oxisols.
260 $c2007
500 $aParceria: Colorado State University, Ghent University, University of Florida, University of California
520 $aCarbon stabilization by macroaggregate-occluded microaggregates (Mm) has been proposed as a principal mechanism for long-term soil organic carbon (SOC) sequestration in temperate alternative agricultural and (af)forested systems. The aim of this study was to evaluate the importance of the Mm fraction for long-term C stabilization in Oxisols and to validate its diagnostic properties for total SOC changes upon changes in land use. Soil samples were taken from the 0?5 and 5?20 cm soil layers of native forest vegetation (NV), conventional tillage (CT) and no-tillage (NT) systems at an experimental site near Passo Fundo and one near Londrina in Southern Brazil. After aggregate-size separations by wet-sieving, macroaggregate-occluded water-stable microaggregates (53?250 ?m) (Mm) were isolated from large (>2000 ?m) and small (>250 ?m) macroaggregates. Particulate organic matter located inside the Mm (intra-Mm-POM) and the mineral fraction (< 53 ?m) associated with the Mm (mineral-Mm) were separated from the POM fraction located outside the Mm (inter-Mm-POM) by density flotation followed by mechanical dispersion. Sand-free Mm-C concentrations on a macroaggregate basis were generally greater under NV and NT compared to CT in the 0?5 cm depth at both sites. Our findings support the importance of Mm (especially the mineral-Mm fraction) as long-term C-stabilization sites in highly weathered tropical soils under sustainable agricultural and natural systems. At both sites, significant differences in total SOC stocks (g C m-2) among different land use systems were always accompanied by parallel Mm-C stock differences. Though total SOC did not differ among land use systems in the 0?20 cm depth at both sites, Mm-C stocks were greater under NT compared to the CT treatment in the 0?20 cm depth at the Londrina site. We concluded that in these highly weathered tropical soils the Mm-C fraction is a more responsive fraction to management changes than total SOC and represents a diagnostic fraction for present as well as potential total SOC changes upon land-use change.
650 $aFloresta
650 $aSolo Orgânico
653 $aForest
653 $aSoil organic
700 1 $aZOTARELLI, L.
700 1 $aBODDEY, R. M.
700 1 $aSIX, J.
773 $tSoil Biology & Biochemistry, Oxford$gv. 39, n. 5, p. 1165-1172, may 2007.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agrobiologia (CNPAB) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 62 | |
| 3. |  | SILVA, J. T.; TORRES, E.; ZOTARELLI, L. Influência do sistema de plantio direto e convencional na agregação do solo. In: MOSTRA ACADÊMICA DE TRABALHOS EM AGRONOMIA, 9., 2005; JORNADA DE ATUALIZAÇÃO EM CIÊNCIAS AGRÁRIAS, 1.; MOSTRA ACADÊMICA DE TRABALHOS EM AGRONOMIA, 8., 2004, Londrina. [Resumos expandidos...]. Londrina: UEL, 2005. p. 258-262. 1 CD-ROM. Seção: Solos da VIII MATA.| Biblioteca(s): Embrapa Soja. |
|   |
| 5. | | GUERZONI, E.; ZOTARELLI, L.; TORRES, E. Distribuição de macro nutrientes no perfil do solo em diferentes sistemas de preparo do solo. In: MOSTRA ACADÊMICA DE TRABALHOS EM AGRONOMIA, 9., 2005; JORNADA DE ATUALIZAÇÃO EM CIÊNCIAS AGRÁRIAS, 1.; MOSTRA ACADÊMICA DE TRABALHOS EM AGRONOMIA, 8., 2004, Londrina. [Resumos expandidos...]. Londrina: UEL, 2005. p. 266-270. 1 CD-ROM. Seção: Solos da VIII MATA.| Biblioteca(s): Embrapa Soja. |
| |
| 6. | | DENEF, K.; ZOTARELLI, L.; BODDEY, R. M.; SIX, J. Microaggregate-associated carbon as a diagnostic fraction for management-induced changes in soil organic carbon in two oxisols. Soil Biology & Biochemistry, Oxford, v. 39, n. 5, p. 1165-1172, may 2007. Parceria: Colorado State University, Ghent University, University of Florida, University of California| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Agrobiologia. |
|  |
| 7. | | NOVAES, M. T.; CARDOSO, E. G.; TORRES, E.; ALVES, B. J. R.; URQUIAGA, S.; ZOTARELLI, L. Acumulação de matéria seca do tremoço (adubo-verde) cultivado em diferentes densidades em plantio direto. In: MOSTRA ACADÊMICA DE TRABALHOS EM AGRONOMIA, 8., 2004, Londrina. Caderno de resumos. Londrina: UEL, 2004. p. 76.| Biblioteca(s): Embrapa Soja. |
| |
| 9. | | ZOTARELLi, L.; TORRES, E.; BODDEY, R. M.; URQUIAGA, S.; ALVES, B. J. R. Influence of no tillage and conventional tillage and crop rotation on soil carbon and nitrogen accumulation and soil aggregation in a rhodic ferralsol. Seropédica: Embrapa Agrobiologia, 2006. 4 p. Trabalho apresentado no 18th World Congress of Soil Science, Philadelphia, Pennsylvania, USA, 9 a 15 de julho de 2006.| Biblioteca(s): Embrapa Agrobiologia. |
| |
| 11. | | SILVA, J. T.; TORRES, E.; ZOTARELLI, L.; NEVES, C. S. V. J. Influência do sistema de plantio no teor de carbono orgânico por classe de agregado do solo. In: MOSTRA ACADÊMICA DE TRABALHOS EM AGRONOMIA, 9., 2005; JORNADA DE ATUALIZAÇÃO EM CIÊNCIAS AGRÁRIAS, 1.; MOSTRA ACADÊMICA DE TRABALHOS EM AGRONOMIA, 8., 2004, Londrina. [Resumos expandidos...]. Londrina: UEL, 2005. p. 156-158. 1 CD-ROM. Seção: Solos da IX MATA.| Biblioteca(s): Embrapa Soja. |
| |
| 12. | | ZOTARELLI, L.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M.; SIX, J. Impact of tillage and crop rotation on light fraction and intra-aggregate soil organic matter in two oxisols. Soil & Tillage Research, Amsterdam, v. 95, n. 1-2, p. 196-206, sept. 2007. Parceria: Colorado State University, UFRRJ, University of California.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Agrobiologia. |
| |
| 13. | | TORRES, E.; SARAIVA, O. F.; FRANCHINI, J. C.; CARDOSO, E. G.; ZOTARELLI, L. Comportamento da compactação do solo no plantio direto e avaliação do seu efeito sobre a produtividade de cultivares de soja. In: CONGRESSO BRASILEIRO DE SOJA, 2.; MERCOSOJA 2002, 2002, Foz do Iguaçu. Perspectivas do agronegócio da soja: resumos. Londrina: Embrapa Soja, 2002. p. 129. (Embrapa Soja. Documentos, 181). Organizado por Odilon Ferreira Saraiva, Clara Beatriz Hoffmann-Campo.| Biblioteca(s): Embrapa Soja. |
| |
| 16. | | TORRES, E.; CARDOSO, E. G.; SARAIVA, O. F.; FRANCHINI, J. C.; ZOTARELLI, L.; PICCININ, J. Distribuição do sistema radicular da cultura da soja em função do manejo do solo. In: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO CENTRAL DO BRASIL, 25., 2003, Uberaba. Resumos... Londrina: Embrapa Soja: EPAMIG: Fundação Triângulo, 2003. p. 265-266. (Embrapa Soja. Documentos, 209). Organizado por Odilon Ferreira Saraiva, Regina Maria Villas Boas de Campos Leite.| Biblioteca(s): Embrapa Soja. |
| |
| 17. | | PICCININ, J. L.; TORRES, E.; ZOTARELLI, L.; SARANVA, O. F.; ESPINDOLA, C. R. Crop yield and physical attributes of a clayey oxisol under diferent soil management systems and crop rotation. In: WORLD CONGRESS OF SOIL SCIENCE, 18., 2006, Philadelphia. Abstracts... Madison: ASA-CSSA-SSSA, 2006. 1 CD-ROM. Nome correto do quarto autor SARAIVA, O. F.| Biblioteca(s): Embrapa Soja. |
| |
| 18. | | ZOTARELLI, L.; TORRES, E.; HUNGRIA, M.; URQUIAGA, S.; BODDEY, R. M.; ALVES, B. J. R. Efeito dos residuos de colheita da cultura da soja sobre a produtividade de trigo e sobre o balanco de N do sistema, conduzido sob plantio direto. In: CONGRESSO BRASILEIRO DE SOJA, 1999, Londrina. Anais... Londrina: Embrapa Soja, 1999. p.345. (Embrapa Soja. Documentos, 124).| Biblioteca(s): Embrapa Soja. |
| |
| 20. | | TORRES, E.; SARAIVA, O. F.; FRANCHINI, J. C.; CARDOSO, E. G.; ZOTARELLI, L. Efeito da compactação do solo sobre as características físicas, desenvolvimento radicular e produtividade de cultivares de soja. In: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO CENTRAL DO BRASIL, 24., 2002, São Pedro, SP. Resumos... Londrina: Embrapa Soja, 2002. p. 207208. (Embrapa Soja. Documentos, 185).| Biblioteca(s): Embrapa Soja. |
| |
| Registros recuperados : 62 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
