| |
|
|
 | 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: |
25/10/2007 |
|
Data da última atualização: |
18/03/2015 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
ZOTARELLI, L.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M.; SIX, J. |
|
Afiliação: |
Lincoln Zotarelli, UFRRJ; Bruno José Rodrigues Alves, Embrapa Agrobiologia; Segundo Urquiaga, Embrapa Agrobiologia; Robert Michael Boddey, Embrapa Agrobiologia; Joerg Six, University of California. |
|
Título: |
Impact of tillage and crop rotation on light fraction and intra-aggregate soil organic matter in two oxisols. |
|
Ano de publicação: |
2007 |
|
Fonte/Imprenta: |
Soil & Tillage Research, Amsterdam, v. 95, n. 1-2, p. 196-206, sept. 2007. |
|
Idioma: |
Inglês |
|
Notas: |
Parceria: Colorado State University, UFRRJ, University of California. |
|
Conteúdo: |
It is well known that no-tillage (NT) practices can promote greater stocks of soil organic matter (SOM) in the soil surface layer compared to conventional tillage (CT) by enhancing the physical protection of aggregate-associated C in temperate soils. However, this link between tillage, aggregation and SOM is less well established for tropical soils, such as Oxisols. The objective of this study was to investigate the underlying mechanisms of SOM stabilization in Oxisols as affected by different crop rotations and tillage regimes at two sites in southern Brazil. Soils were sampled from two agricultural experiment sites (Passo Fundo and Londrina) in southern Brazil, with treatments comparing different crop rotations under NT and CT management, and a reference soil under native vegetation (NV). Free light fraction (LF) and intra-aggregate particulate organic matter (iPOM) were isolated from slaking-resistant aggregates. Of the total C associated with aggregates, 79?90% was found in the mineral fraction, but there were no differences between NT and CT. In contrast, tillage drastically decreased LF-C concentrations in the 0?5 cm depth layer at both sites. In the same depth layer of NT systems at Londrina, the concentrations of iPOM-C were greater when a legume cover crop was included in the rotation. At Londrina, the order of total iPOM-C levels was generally NV > NT > CT in the 0?5 cm depth interval, but the difference between NT and CT was much less than in Passo Fundo. At Passo Fundo, the greatest concentrations and differences in concentrations across tillage treatments were found in the fine (53?250 ?m) iPOM fractions occluded within microaggregates. In conclusion, even though no aggregate hierarchy exists in these Oxisols, our results corroborate the concept of a stabilization of POM-C within microaggregates in no-tillage systems, especially when green manures are included in the rotation. MenosIt is well known that no-tillage (NT) practices can promote greater stocks of soil organic matter (SOM) in the soil surface layer compared to conventional tillage (CT) by enhancing the physical protection of aggregate-associated C in temperate soils. However, this link between tillage, aggregation and SOM is less well established for tropical soils, such as Oxisols. The objective of this study was to investigate the underlying mechanisms of SOM stabilization in Oxisols as affected by different crop rotations and tillage regimes at two sites in southern Brazil. Soils were sampled from two agricultural experiment sites (Passo Fundo and Londrina) in southern Brazil, with treatments comparing different crop rotations under NT and CT management, and a reference soil under native vegetation (NV). Free light fraction (LF) and intra-aggregate particulate organic matter (iPOM) were isolated from slaking-resistant aggregates. Of the total C associated with aggregates, 79?90% was found in the mineral fraction, but there were no differences between NT and CT. In contrast, tillage drastically decreased LF-C concentrations in the 0?5 cm depth layer at both sites. In the same depth layer of NT systems at Londrina, the concentrations of iPOM-C were greater when a legume cover crop was included in the rotation. At Londrina, the order of total iPOM-C levels was generally NV > NT > CT in the 0?5 cm depth interval, but the difference between NT and CT was much less than in Passo Fundo. At Passo... Mostrar Tudo |
|
Palavras-Chave: |
Agregado do solo; Matéria orgânica do solo; Oxissolo; Rotação de culturas. |
|
Thesaurus Nal: |
crop rotation; Oxisols; soil aggregates; soil organic matter. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02795naa a2200277 a 4500
001 1629549
005 2015-03-18
008 2007 bl uuuu u00u1 u #d
100 1 $aZOTARELLI, L.
245 $aImpact of tillage and crop rotation on light fraction and intra-aggregate soil organic matter in two oxisols.
260 $c2007
500 $aParceria: Colorado State University, UFRRJ, University of California.
520 $aIt is well known that no-tillage (NT) practices can promote greater stocks of soil organic matter (SOM) in the soil surface layer compared to conventional tillage (CT) by enhancing the physical protection of aggregate-associated C in temperate soils. However, this link between tillage, aggregation and SOM is less well established for tropical soils, such as Oxisols. The objective of this study was to investigate the underlying mechanisms of SOM stabilization in Oxisols as affected by different crop rotations and tillage regimes at two sites in southern Brazil. Soils were sampled from two agricultural experiment sites (Passo Fundo and Londrina) in southern Brazil, with treatments comparing different crop rotations under NT and CT management, and a reference soil under native vegetation (NV). Free light fraction (LF) and intra-aggregate particulate organic matter (iPOM) were isolated from slaking-resistant aggregates. Of the total C associated with aggregates, 79?90% was found in the mineral fraction, but there were no differences between NT and CT. In contrast, tillage drastically decreased LF-C concentrations in the 0?5 cm depth layer at both sites. In the same depth layer of NT systems at Londrina, the concentrations of iPOM-C were greater when a legume cover crop was included in the rotation. At Londrina, the order of total iPOM-C levels was generally NV > NT > CT in the 0?5 cm depth interval, but the difference between NT and CT was much less than in Passo Fundo. At Passo Fundo, the greatest concentrations and differences in concentrations across tillage treatments were found in the fine (53?250 ?m) iPOM fractions occluded within microaggregates. In conclusion, even though no aggregate hierarchy exists in these Oxisols, our results corroborate the concept of a stabilization of POM-C within microaggregates in no-tillage systems, especially when green manures are included in the rotation.
650 $acrop rotation
650 $aOxisols
650 $asoil aggregates
650 $asoil organic matter
653 $aAgregado do solo
653 $aMatéria orgânica do solo
653 $aOxissolo
653 $aRotação de culturas
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
700 1 $aSIX, J.
773 $tSoil & Tillage Research, Amsterdam$gv. 95, n. 1-2, p. 196-206, sept. 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 : 63 | |
| 3. |  | 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. |
|   |
| 5. | | 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. |
| |
| 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. |
|  |
| 8. | | 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. |
| |
| 11. | | 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. |
| |
| 12. | | 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. |
| |
| 14. | | ZOTARELLI, L.; TORRES, E.; BODDEY, R. M.; URQUIAGA, S.; ALVES, B. J. R. Recuperação do N derivado do fertilizante pela cultura do milho em sistema de plantio direto. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 25.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 9.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 7.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 4., 2002, Rio de Janeiro. Fertbio 2002: agricultura: bases ecológicas para o desenvolvimento social e econômico sustentado. Rio de Janeiro, 2002. p. 91. Guia do congressista e em CD-ROM.| Biblioteca(s): Embrapa Soja. |
| |
| 16. | | 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. |
| |
| 17. | | 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. |
| |
| 18. | | 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. |
| |
| 20. | | 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. |
| |
| Registros recuperados : 63 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
