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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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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 550 | |
| 87. |  | CHIBEBA, A. M.; KYEI-BOAHEN, S.; GUIMARAES, M. de F.; NOGUEIRA, M. A.; HUNGRIA, M. Isolation, characterization and selection of indigenous Bradyrhizobium strains with outstanding symbiotic performance to increase soybean yields in Mozambique. Agriculture, Ecosystems and Environment, v. 246, p. 291-305, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Soja. |
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| 97. | | SILVA, R. F. da; AQUINO, A. M. de; MERCANTE, F. M.; GUIMARÃES, M. de F. Macrofauna invertebrada do solo em sistema integrado de produção agropecuária no cerrado. Acta Scientiarum, Agronomy, Maringá, v. 30, n. 5, p.725‑ 731, set./out. 2008.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 99. | | SILVA, R. F. da; AQUINO, A. M. de; MERCANTE, F. M.; GUIMARÃES, M. de F. Macrofauna invertebrada do solo sob diferentes sistemas de produção em Latossolo da Região do Cerrado. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 41, n. 4, p. 697-704, abr. 2006 Título em inglês: Soil invertebrate macrofauna under different production systems in a Hapludox in the Cerrado Region.| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 550 | |
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