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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
21/03/2005 |
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Data da última atualização: |
21/03/2005 |
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Autoria: |
BALBINO, L. C.; BRUAND, A.; BROSSARD, M.; GUIMARÃES, M. de F. |
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Título: |
Comportement de la phase argileuse lors de la dessiccation dans des ferralsols microagrégés du Brésil: rôle de la microstructure et de la matière organique. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Comptes Rendus de l'Academie des Sciences Paris, v. 332, p. 673-680, 2001. |
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Idioma: |
Francês |
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Conteúdo: |
Behaviour of the clay fraction during desiccation in microagggregated Ferralsols from Brazil: role of microestructure and organic matter. The physical properties of the microaggregates of Ferralsols are still under discussion. Two sites were selected for study: in each site one soil under a native savannah (Cerrado) and another one under pasture were studied. Samples were analysed in the laboratory by using scanning electron microscopy and mercury porosimetry and by measuring the water content at -0.1 and 1.5 MPa potential. Results showed the presence of microaggregates 50 to 300 mm in size and bigger ones 500 to 1000 mm in size. The latter were often packed in dense volumes 2 to 20 mm in size, which were numerous in the top soil under pasture. These dense volumes are casts and would result from an imbalance in the faunal population as a consequence of deforestation. Results showed also a shinkage of the clayed phase for drying and this shrinkage increased with the carbon content of the soil. These results showed that microaggregates are not rigid fabrics and the significant role of organic matter in physical properties of the soils studied. |
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Thesagro: |
Argila; Carbono; Cerrado; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01805naa a2200205 a 4500
001 1568628
005 2005-03-21
008 2001 bl --- 0-- u #d
100 1 $aBALBINO, L. C.
245 $aComportement de la phase argileuse lors de la dessiccation dans des ferralsols microagrégés du Brésil$brôle de la microstructure et de la matière organique.
260 $c2001
520 $aBehaviour of the clay fraction during desiccation in microagggregated Ferralsols from Brazil: role of microestructure and organic matter. The physical properties of the microaggregates of Ferralsols are still under discussion. Two sites were selected for study: in each site one soil under a native savannah (Cerrado) and another one under pasture were studied. Samples were analysed in the laboratory by using scanning electron microscopy and mercury porosimetry and by measuring the water content at -0.1 and 1.5 MPa potential. Results showed the presence of microaggregates 50 to 300 mm in size and bigger ones 500 to 1000 mm in size. The latter were often packed in dense volumes 2 to 20 mm in size, which were numerous in the top soil under pasture. These dense volumes are casts and would result from an imbalance in the faunal population as a consequence of deforestation. Results showed also a shinkage of the clayed phase for drying and this shrinkage increased with the carbon content of the soil. These results showed that microaggregates are not rigid fabrics and the significant role of organic matter in physical properties of the soils studied.
650 $aArgila
650 $aCarbono
650 $aCerrado
650 $aSolo
700 1 $aBRUAND, A.
700 1 $aBROSSARD, M.
700 1 $aGUIMARÃES, M. de F.
773 $tComptes Rendus de l'Academie des Sciences Paris$gv. 332, p. 673-680, 2001.
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Embrapa Cerrados (CPAC) |
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| Registros recuperados : 61 | |
| 12. |  | SILVA, A. V.; REATTO, A.; BROSSARD, M.; MARTINS, E. M.; CARVALHO, A. M. Quantificacao de raizes utilizando softwares de tratamento de imagens. In: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 28., 2001, Londrina, PR. Ciencia do solo: fator de produtividade competitiva com sustentabilidade. Londrina: SBCS, 2001. p. 254. Resumo.| Biblioteca(s): Embrapa Cerrados. |
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| 14. | | BENITO, N. P.; SOARES, R. dos S.; CAMARGO, A. J. A. de; BROSSARD, M. Criação de colônias de cupins de montículo em casa de vegetação. In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 22., 2008, Uberlândia. Ciência, tecnologia e inovação: anais. Viçosa, MG: UFV, 2008. 1 CD- ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Cerrados. |
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| 15. | | MARCHÃO, R. L.; BECQUER, T.; BRUNET, D.; BALBINO, L. C.; VILELA, L.; BROSSARD, M. Carbon and nitrogen stocks in a Brazilian clayey Oxisol: 13-year effects of integrated crop-livestock management systems. Soil and Tillage Research, Amsterdam, v. 103, p. 442-450, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Cerrados. |
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| 16. | | LARDY, L. C.; BROSSARD, M.; ASSAD, M. L. L.; LAURENT, J. Y. Carbon and phosphorus stocks of clayey ferralsols in cerrado native and agroecosystems, Brazil. Agriculture, Ecosystems and Environment, Amsterdam, v. 92, p. 147-158, 2002.| Biblioteca(s): Embrapa Cerrados. |
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| 19. | | BALBINO, L. C.; BRUAND, A.; COUSIN, I.; BROSSARD, M.; QUÉTIN, P.; GRIMALDI, M. Change in the hydraulic properties of a Brazilian clay ferralsol on clearing for pasture. Geoderma, v. 120, n. 3/4, p. 297-307, June 2004.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 20. | | BALBINO, L. C.; BRUAND, A.; BROSSARD, M.; GRIMALDI, M.; HAJNOS, M.; GUIMARAES, M. F. Changes in porosity and microaggregation in clayey Ferralsols of the Brazilian Cerrado on clearing for pasture. European Journal of Soil Science, v. 53, n. 2, p. 219-230, June 2002.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| Registros recuperados : 61 | |
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