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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
29/04/1999 |
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Data da última atualização: |
29/04/1999 |
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Autoria: |
DETWILLER, R. P. |
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Título: |
Land use change and the global carbon cycle: the role of tropical soils. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Biogeochemistry, v.2, n.1, p.67-93, 1986. |
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Idioma: |
Inglês |
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Conteúdo: |
Millions of hectares of tropical forest are cleared annually for agriculture, pasture, shifting cultivation and timber. One result of these changes in land use is the release of CO2 from the cleared vegetation and soils. Although there is uncertainty as to the size of this release, it appears to be a major source of atmospheric CO2, second only to the release soils using a computer model that simulates land use change in the tropics and data on (1) the carbon content of forest soils before clearing; (2) the changes in the carbon content under the various types of land use; and (3) the area of forest converted to each use. It appears that the clearing and use of tropical soils affects their carbon content to a depth of about 40 cm. Soils of tropical closed forests contain approximately 6.7 kg C.m-2; soils of tropical open forests contain approximately 5.2kg C.m-2 to this depth. The cultivation of tropical soils reduces their carbon content by 40% 5 yr after clearing; the use of these soils for pasture reduces it by about 20%. Logging in tropical forests appears to have little effect on soil carbon. The carbon content of soils used by shifting cultivators returns to the level found under primary forest about 35 yr after abandonnet. The estimated net release of carbon from tropical soils due to land use change was 0.11-0.26 X 10 g in 1980. |
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Palavras-Chave: |
Biogeoquimica; Tropical soil. |
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Thesagro: |
Solo Tropical. |
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Thesaurus Nal: |
biogeochemistry. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01820naa a2200169 a 4500
001 1795464
005 1999-04-29
008 1986 bl --- 0-- u #d
100 1 $aDETWILLER, R. P.
245 $aLand use change and the global carbon cycle$bthe role of tropical soils.
260 $c1986
520 $aMillions of hectares of tropical forest are cleared annually for agriculture, pasture, shifting cultivation and timber. One result of these changes in land use is the release of CO2 from the cleared vegetation and soils. Although there is uncertainty as to the size of this release, it appears to be a major source of atmospheric CO2, second only to the release soils using a computer model that simulates land use change in the tropics and data on (1) the carbon content of forest soils before clearing; (2) the changes in the carbon content under the various types of land use; and (3) the area of forest converted to each use. It appears that the clearing and use of tropical soils affects their carbon content to a depth of about 40 cm. Soils of tropical closed forests contain approximately 6.7 kg C.m-2; soils of tropical open forests contain approximately 5.2kg C.m-2 to this depth. The cultivation of tropical soils reduces their carbon content by 40% 5 yr after clearing; the use of these soils for pasture reduces it by about 20%. Logging in tropical forests appears to have little effect on soil carbon. The carbon content of soils used by shifting cultivators returns to the level found under primary forest about 35 yr after abandonnet. The estimated net release of carbon from tropical soils due to land use change was 0.11-0.26 X 10 g in 1980.
650 $abiogeochemistry
650 $aSolo Tropical
653 $aBiogeoquimica
653 $aTropical soil
773 $tBiogeochemistry$gv.2, n.1, p.67-93, 1986.
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
25/01/2024 |
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Data da última atualização: |
25/01/2024 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
ANJOS, L. H. C. dos; PEREIRA, M. G.; FONTANA, A. |
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Afiliação: |
LÚCIA HELENA CUNHA DOS ANJOS, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; MARCOS GERVASIO PEREIRA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; ADEMIR FONTANA, CNPS. |
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Título: |
Matéria orgânica e pedogênese. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: SANTOS, G. de A.; SILVA, L. S. da; CANELLAS, L. P.; CAMARGO, F. A. de O. (ed.). Fundamentos da matéria orgânica do solo: ecossistemas tropicais & subtropicais. 2. ed. rev. e atual. Porto Alegre: Metrópole, 2008. cap. 6, p. 65-86. |
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Idioma: |
Português |
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Thesagro: |
Gênese do Solo; Matéria Orgânica; Solo. |
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Thesaurus NAL: |
Soil organic matter. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 00665naa a2200181 a 4500
001 2161310
005 2024-01-25
008 2008 bl uuuu u00u1 u #d
100 1 $aANJOS, L. H. C. dos
245 $aMatéria orgânica e pedogênese.
260 $c2008
650 $aSoil organic matter
650 $aGênese do Solo
650 $aMatéria Orgânica
650 $aSolo
700 1 $aPEREIRA, M. G.
700 1 $aFONTANA, A.
773 $tIn: SANTOS, G. de A.; SILVA, L. S. da; CANELLAS, L. P.; CAMARGO, F. A. de O. (ed.). Fundamentos da matéria orgânica do solo: ecossistemas tropicais & subtropicais. 2. ed. rev. e atual. Porto Alegre: Metrópole, 2008. cap. 6, p. 65-86.
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