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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
03/06/2014 |
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Data da última atualização: |
19/10/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
REICHERT, J. M.; BERVALD, C. M. P.; RODRIGUES, M. F.; KATO, O. R.; REINERT, D. J. |
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Afiliação: |
José Miguel Reichert, UFSM; Clóvis Moisés Priebe Bervald, GSI Brazil; Miriam Fernanda Rodrigues, UFSM; OSVALDO RYOHEI KATO, CPATU; Dalvan José Reinert, UFSM. |
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Título: |
Mechanized land preparation in eastern Amazon in fire-free forest-based fallow systems as alternatives to slash-and-burn practices: Hydraulic and mechanical soil properties. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Agriculture, Ecosystems & Environment, v. 192, p. 47-60, July 2014. |
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DOI: |
http://dx.doi.org/10.1016/j.agee.2014.03.046 |
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Idioma: |
Inglês |
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Conteúdo: |
Soils of the Brazilian Amazon are particularly fragile due to the inherent soil properties, climate conditions, and the management systems adopted in the region. The aim of this study was to evaluate changes in the mechanical properties and water retention of soils under different tillage systems of secondary vegetation in an area kept fallow for 10 years in Eastern Amazon, Brazil. The treatments consisted of the slash-and-burn of secondary vegetation (SB), slash-and-burn, stump removal and plowing (SBSP), chop-and-mulch of secondary vegetation (CM), and original secondary vegetation (OSV). Undisturbed soil samples were collected immediately, and 15 and 30 days after site preparation (0, 15, and 30 DAP, respectively) to determine bulk density (BD), total porosity (TP) and marcoporosity (Mac), and water retention. Preconsolidation pressure (σp) and compression index (Cc) were assessed at 0 and 15 DAP, whereas soil penetration resistance (PR) was measured directly in the soil profile. The least BD and greatest Mac and TP and the highest water retention at −30 kPa matric potential were obtained immediately after preparation using the SBSP system. The σp at 0 DAP was lower than the pressure exerted on the soil surface by the machines used for the CM and SBSP systems, but increased numerically to 15 DAP. The PR differed among the systems until reaching 0.25 cm soil depth. Leaving plant residues from the mulching of secondary vegetation on the soil is not, by itself, an effective practice for maintaining structural soil quality in the short term. Soil tillage in the SBSP system decompacts the upper soil layer, which improves all physical indicators, but only in the short term (less than one month). Soil reconsolidates quickly with the lack or reduced effect of organic matter on soil structure and system equilibrium. MenosSoils of the Brazilian Amazon are particularly fragile due to the inherent soil properties, climate conditions, and the management systems adopted in the region. The aim of this study was to evaluate changes in the mechanical properties and water retention of soils under different tillage systems of secondary vegetation in an area kept fallow for 10 years in Eastern Amazon, Brazil. The treatments consisted of the slash-and-burn of secondary vegetation (SB), slash-and-burn, stump removal and plowing (SBSP), chop-and-mulch of secondary vegetation (CM), and original secondary vegetation (OSV). Undisturbed soil samples were collected immediately, and 15 and 30 days after site preparation (0, 15, and 30 DAP, respectively) to determine bulk density (BD), total porosity (TP) and marcoporosity (Mac), and water retention. Preconsolidation pressure (σp) and compression index (Cc) were assessed at 0 and 15 DAP, whereas soil penetration resistance (PR) was measured directly in the soil profile. The least BD and greatest Mac and TP and the highest water retention at −30 kPa matric potential were obtained immediately after preparation using the SBSP system. The σp at 0 DAP was lower than the pressure exerted on the soil surface by the machines used for the CM and SBSP systems, but increased numerically to 15 DAP. The PR differed among the systems until reaching 0.25 cm soil depth. Leaving plant residues from the mulching of secondary vegetation on the soil is not, by itsel... Mostrar Tudo |
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Palavras-Chave: |
Corte e queima; Preparação do solo. |
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Thesagro: |
Estrutura do Solo; Mecânica do Solo; Mecanização; Vegetação Secundária. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02744naa a2200253 a 4500
001 1987507
005 2022-10-19
008 2014 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.agee.2014.03.046$2DOI
100 1 $aREICHERT, J. M.
245 $aMechanized land preparation in eastern Amazon in fire-free forest-based fallow systems as alternatives to slash-and-burn practices$bHydraulic and mechanical soil properties.$h[electronic resource]
260 $c2014
520 $aSoils of the Brazilian Amazon are particularly fragile due to the inherent soil properties, climate conditions, and the management systems adopted in the region. The aim of this study was to evaluate changes in the mechanical properties and water retention of soils under different tillage systems of secondary vegetation in an area kept fallow for 10 years in Eastern Amazon, Brazil. The treatments consisted of the slash-and-burn of secondary vegetation (SB), slash-and-burn, stump removal and plowing (SBSP), chop-and-mulch of secondary vegetation (CM), and original secondary vegetation (OSV). Undisturbed soil samples were collected immediately, and 15 and 30 days after site preparation (0, 15, and 30 DAP, respectively) to determine bulk density (BD), total porosity (TP) and marcoporosity (Mac), and water retention. Preconsolidation pressure (σp) and compression index (Cc) were assessed at 0 and 15 DAP, whereas soil penetration resistance (PR) was measured directly in the soil profile. The least BD and greatest Mac and TP and the highest water retention at −30 kPa matric potential were obtained immediately after preparation using the SBSP system. The σp at 0 DAP was lower than the pressure exerted on the soil surface by the machines used for the CM and SBSP systems, but increased numerically to 15 DAP. The PR differed among the systems until reaching 0.25 cm soil depth. Leaving plant residues from the mulching of secondary vegetation on the soil is not, by itself, an effective practice for maintaining structural soil quality in the short term. Soil tillage in the SBSP system decompacts the upper soil layer, which improves all physical indicators, but only in the short term (less than one month). Soil reconsolidates quickly with the lack or reduced effect of organic matter on soil structure and system equilibrium.
650 $aEstrutura do Solo
650 $aMecânica do Solo
650 $aMecanização
650 $aVegetação Secundária
653 $aCorte e queima
653 $aPreparação do solo
700 1 $aBERVALD, C. M. P.
700 1 $aRODRIGUES, M. F.
700 1 $aKATO, O. R.
700 1 $aREINERT, D. J.
773 $tAgriculture, Ecosystems & Environment$gv. 192, p. 47-60, July 2014.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
23/03/2009 |
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Data da última atualização: |
04/03/2010 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
CARVALHO, P. G. B. de; LOPES, S. B.; MORETTI, C. L.; RIBEIRO, R. L. V. |
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Afiliação: |
Patrícia Gonçalves Baptista de Carvalho, Embrapa Hortaliças; Celso Luiz Moretti, Embrapa Hortaliças; Ricardo Luiz Vasconcelos Ribeiro, Embrapa Hortaliças. |
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Título: |
Avaliação da degradação de betalaínas durante a secagem de resíduos do processamento mínimo de beterrabas. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIÊNCIA E TECNOLOGIA DOS ALIMENTOS, 21.; SEMINÁRIO LATINOAMERICANO E DO CARIBE DE CIÊNCIA E TECNOLOGIA DE ALIMENTOS, 15., 2008, Belo Horizonte. Anais... Belo Horizonte: Sociedade Brasileira de Ciência e Tecnologia de Alimentos, 2008. |
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Páginas: |
3 p. |
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Idioma: |
Português |
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Palavras-Chave: |
Betalaína; Coloração; Produto minimamente processado; Resíduo agroindustrial. |
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Thesagro: |
Beta Vulgaris; Beterraba; Composição Química; Pigmentação; Processamento Mínimo; Secagem; Temperatura. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01064naa a2200289 a 4500
001 1782223
005 2010-03-04
008 2008 bl uuuu u00u1 u #d
100 1 $aCARVALHO, P. G. B. de
245 $aAvaliação da degradação de betalaínas durante a secagem de resíduos do processamento mínimo de beterrabas.
260 $c2008
300 $a3 p.
650 $aBeta Vulgaris
650 $aBeterraba
650 $aComposição Química
650 $aPigmentação
650 $aProcessamento Mínimo
650 $aSecagem
650 $aTemperatura
653 $aBetalaína
653 $aColoração
653 $aProduto minimamente processado
653 $aResíduo agroindustrial
700 1 $aLOPES, S. B.
700 1 $aMORETTI, C. L.
700 1 $aRIBEIRO, R. L. V.
773 $tIn: CONGRESSO BRASILEIRO DE CIÊNCIA E TECNOLOGIA DOS ALIMENTOS, 21.; SEMINÁRIO LATINOAMERICANO E DO CARIBE DE CIÊNCIA E TECNOLOGIA DE ALIMENTOS, 15., 2008, Belo Horizonte. Anais... Belo Horizonte: Sociedade Brasileira de Ciência e Tecnologia de Alimentos, 2008.
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