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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
14/12/2005 |
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Data da última atualização: |
31/08/2017 |
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Autoria: |
BLANCHART, E.; ALBRECHT, A.; BROWN, G.; DECAENS, T.; DUBOISSET, A.; LAVELLE, P.; MARIANI, L.; ROOSE, E. |
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Título: |
Effects of tropical endogeic earthworms on soil erosion. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Agriculture, Ecosystems & Environment, v. 104, n. 2, p. 303-315, Oct. 2004. |
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Idioma: |
Inglês |
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Notas: |
Nome correto do terceiro autor: BROWN, G. G. |
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Conteúdo: |
Soil biota play a crucial role in influencing soil structure and related soil physical properties. In particular, an abundant literature shows that earthworms, through their burrowing and feeding activities, influence particle size distribution, organic matter content, organic matter location, soil aggregation, aggregate stability and tensile strength, soil roughness, and water infiltration. All those properties greatly influence soil erodibility and soil erosion. Nevertheless, there are few quantitative studies of the influence of earthworms on soil erosion. In some cases, earthworms are said to increase soil losses while other studies emphasize their control on structural stability inducing a reduction in soil erosion. This paper analyses the effects of endogeic earthworms on soil erosion, using recently published data collected in the humid tropics. Endogeics comprise two separate functional groups regarding their effects on soil physical properties, i.e. "compacting" and "decompacting" species whose effects on soil erosion may differ substantially. The effects of these earthworms on soil erodibility and erosion in the tropics ultimately depend on soil types and on the organic matter content in soils. In kaolinitic soils, irrespective of clay content, endogeics greatly influence aggregation, aggregate stability, total porosity and pore size distribution; whereas in smectitic soils (such as vertisols), earthworms have a smaller effect on soil erodibility than soil organic matter and cations. Some options for managing earthworms and organic matter in order to limit soil erosion are also discussed in this paper. MenosSoil biota play a crucial role in influencing soil structure and related soil physical properties. In particular, an abundant literature shows that earthworms, through their burrowing and feeding activities, influence particle size distribution, organic matter content, organic matter location, soil aggregation, aggregate stability and tensile strength, soil roughness, and water infiltration. All those properties greatly influence soil erodibility and soil erosion. Nevertheless, there are few quantitative studies of the influence of earthworms on soil erosion. In some cases, earthworms are said to increase soil losses while other studies emphasize their control on structural stability inducing a reduction in soil erosion. This paper analyses the effects of endogeic earthworms on soil erosion, using recently published data collected in the humid tropics. Endogeics comprise two separate functional groups regarding their effects on soil physical properties, i.e. "compacting" and "decompacting" species whose effects on soil erosion may differ substantially. The effects of these earthworms on soil erodibility and erosion in the tropics ultimately depend on soil types and on the organic matter content in soils. In kaolinitic soils, irrespective of clay content, endogeics greatly influence aggregation, aggregate stability, total porosity and pore size distribution; whereas in smectitic soils (such as vertisols), earthworms have a smaller effect on soil erodibility than soil organic ... Mostrar Tudo |
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Thesagro: |
Solo. |
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Categoria do assunto: |
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LEADER 02271naa a2200229 a 4500
001 1468644
005 2017-08-31
008 2004 bl --- 0-- u #d
100 1 $aBLANCHART, E.
245 $aEffects of tropical endogeic earthworms on soil erosion.
260 $c2004
500 $aNome correto do terceiro autor: BROWN, G. G.
520 $aSoil biota play a crucial role in influencing soil structure and related soil physical properties. In particular, an abundant literature shows that earthworms, through their burrowing and feeding activities, influence particle size distribution, organic matter content, organic matter location, soil aggregation, aggregate stability and tensile strength, soil roughness, and water infiltration. All those properties greatly influence soil erodibility and soil erosion. Nevertheless, there are few quantitative studies of the influence of earthworms on soil erosion. In some cases, earthworms are said to increase soil losses while other studies emphasize their control on structural stability inducing a reduction in soil erosion. This paper analyses the effects of endogeic earthworms on soil erosion, using recently published data collected in the humid tropics. Endogeics comprise two separate functional groups regarding their effects on soil physical properties, i.e. "compacting" and "decompacting" species whose effects on soil erosion may differ substantially. The effects of these earthworms on soil erodibility and erosion in the tropics ultimately depend on soil types and on the organic matter content in soils. In kaolinitic soils, irrespective of clay content, endogeics greatly influence aggregation, aggregate stability, total porosity and pore size distribution; whereas in smectitic soils (such as vertisols), earthworms have a smaller effect on soil erodibility than soil organic matter and cations. Some options for managing earthworms and organic matter in order to limit soil erosion are also discussed in this paper.
650 $aSolo
700 1 $aALBRECHT, A.
700 1 $aBROWN, G.
700 1 $aDECAENS, T.
700 1 $aDUBOISSET, A.
700 1 $aLAVELLE, P.
700 1 $aMARIANI, L.
700 1 $aROOSE, E.
773 $tAgriculture, Ecosystems & Environment$gv. 104, n. 2, p. 303-315, Oct. 2004.
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Registro original: |
Embrapa Soja (CNPSO) |
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Origem |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
13/08/2001 |
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Data da última atualização: |
27/09/2004 |
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Autoria: |
PAULA, J. E. de. |
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Título: |
Madeiras da Caatinga Uteis para Producao de Energia. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.28, n.2, p.153-165,fev.1993 |
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Idioma: |
Português |
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Conteúdo: |
Foi estudada a anatomia da madeira de 8 especies da caatinga, e realizou-se um inventario dendrometrico. Determinou-se a biomassa total por m3 de madeira seca. A qualificação de madeira destinada a geracao de energia (alcool, coque metalurgico, carvao e lenha), foi feita com base no peso especifico, na fracao parede das fibras, no fator percentual 0,80 e na frequencia das fibras. Na caatinga inundavel, por estimativa, foram constatadas 287 arvores por hectare, as quais forneceram 268 t de madeira seca por hectare. |
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Palavras-Chave: |
Anatomia de madeira. |
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Thesagro: |
Biomassa; Celulose; Dendrometria; Lignina. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/20487/1/pab93_02_fev.pdf
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Marc: |
LEADER 01011naa a2200181 a 4500
001 1105389
005 2004-09-27
008 1993 bl uuuu u00u1 u #d
100 1 $aPAULA, J. E. de
245 $aMadeiras da Caatinga Uteis para Producao de Energia.
260 $c1993
520 $aFoi estudada a anatomia da madeira de 8 especies da caatinga, e realizou-se um inventario dendrometrico. Determinou-se a biomassa total por m3 de madeira seca. A qualificação de madeira destinada a geracao de energia (alcool, coque metalurgico, carvao e lenha), foi feita com base no peso especifico, na fracao parede das fibras, no fator percentual 0,80 e na frequencia das fibras. Na caatinga inundavel, por estimativa, foram constatadas 287 arvores por hectare, as quais forneceram 268 t de madeira seca por hectare.
650 $aBiomassa
650 $aCelulose
650 $aDendrometria
650 $aLignina
653 $aAnatomia de madeira
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.28, n.2, p.153-165,fev.1993
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