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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: |
25/10/2007 |
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Data da última atualização: |
18/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ZOTARELLI, L.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M.; SIX, J. |
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Afiliação: |
Lincoln Zotarelli, UFRRJ; Bruno José Rodrigues Alves, Embrapa Agrobiologia; Segundo Urquiaga, Embrapa Agrobiologia; Robert Michael Boddey, Embrapa Agrobiologia; Joerg Six, University of California. |
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Título: |
Impact of tillage and crop rotation on light fraction and intra-aggregate soil organic matter in two oxisols. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Soil & Tillage Research, Amsterdam, v. 95, n. 1-2, p. 196-206, sept. 2007. |
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Idioma: |
Inglês |
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Notas: |
Parceria: Colorado State University, UFRRJ, University of California. |
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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 |
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Palavras-Chave: |
Agregado do solo; Matéria orgânica do solo; Oxissolo; Rotação de culturas. |
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Thesaurus Nal: |
crop rotation; Oxisols; soil aggregates; soil organic matter. |
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Categoria do assunto: |
-- |
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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.
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Embrapa Agrobiologia (CNPAB) |
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| 124. |  | CHAGAS, E.; ARAÚJO, A. de P.; PEREZ, D. V.; ALVES, B. J. R.; TEIXEIRA, M. G. Sementes enriquecidas com fósforo aumentam a contribuição da fixação biológica de nitrogênio no feijoeiro. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 32., 2009, Fortaleza. O solo e a produção de bioenergia: perspectivas e desafios. [Viçosa, MG]: SBCS; Fortaleza: UFC, 2009. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 127. | | MONTEIRO, J. M. G.; ALVES, B. J. R.; ZUCHELLO, F.; SANT'ANNA, S. A. C. de. Emissão de gases de efeito-estufa em solos sob floresta e sob pastagem. In: PRADO, R. B.; FIDALGO, E. C. C.; BONNET, A. (Ed.). Monitoramento da revegetação do COMPERJ: etapa inicial. Brasília, DF: Embrapa, 2014. cap. 12, p. 207-220.| Tipo: Capítulo em Livro Técnico-Científico |
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| 128. | | CARDOSO, A. S.; URQUIAGA, S.; ALVES, B. J. R.; BODDEY, R. M.; JANTALIA, C. P. Emissão de metano pelas fezes bovinos leiteiros, depositadas diretamente em solo de pastagem de Seropédica, RJ. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 33., 2011, Uberlândia. Solos nos biomas brasileiros: sustentabilidade e mudanças climáticas: anais. [Uberlândia]: SBCS: UFU, ICIAG, 2011.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agrobiologia. |
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| 130. | | GIACOMINI, S. J.; JANTALIA, C. P.; AITYA, C.; URQUIAGA, S.; ALVES, B. J. R. Emissão de óxido nitroso com a aplicação de dejetos líquidos de suínos em solo sob plantio direto. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 41, n. 11, p. 1653-1661, nov. 2006 Título em inglês: Nitrous oxide emissions following pig slurry application in soil under no-tillage system.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 131. | | LESSA, A. C. R.; LENGRUBER, J. A.; URQUIAGA, S.; BODDEY, R. M.; ALVES, B. J. R. Emissão de óxido nitroso de fezes e urina bovina. 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: Embrapa Soja: SBCS: IAPAR, UEL, 2008. 4 p. 1 CD-ROM. Parceria: UFRRJ.
Organizado por: Adilson de Oliveira Júnior, Regina Maria Villas Bôas de Campos Leite, César de Castro, Fábio Álvares de Oliveira; Odilon Ferreira Saraiva.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Agrobiologia. |
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| 136. | | FERNANDES, P. R. T.; POLIDORO, J. C.; JANTALIA, C. P.; ALVES, B. J. R.; URQUIAGA, S. Emissões de óxido nitroso em solos adubados com fontes orgânicas e minerais de nitrogênio cultivados com brócolos (Brassica oleracea var. italica) em sistema de preparo mínimo e convencional. In: CONGRESSO DE PESQUISA, 2., JORNADA DE INICIAÇÃO CIENTÍFICAS DA UFRural/RJ, 14., 2004, Seropédica, RJ. Anais... Seropédica: Universidade Federal Rural do Rio de Janeiro, 2004. v. 14. p. 217-221. CD ROM. Área de Agronomia. JIC 369.pdf.| Biblioteca(s): Embrapa Agrobiologia. |
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| 139. | | ALVES, B. J. R.; TORRES, E.; URQUIAGA, S.; BODDEY, R. M.; ZOTARELLI, L. Resposta da cultura do milho a abudacao verde com tremoco, em sistema de rotacao de culturas sob plantio direto e convencional. In: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 28., 2001, Londrina. Ciencia do solo: fator de produtividade e competitividade com sustentabilidade. Londrina: Sociedade Brasileira de Ciencia do Solo, 2001. p.255.| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 731 | |
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