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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
20/02/2009 |
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Data da última atualização: |
22/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DAVIDSON, E.; SA, T. D. de A.; CARVALHO, C. J. R. de; FIGUEIREDO, R. de O.; KATO, M. do S. A.; KATO, O. R.; ISHIDA, F. Y. |
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Afiliação: |
Eric Atlas Davidson, The Woods Hole Research Center; TATIANA DEANE DE ABREU SA, CPATU; CLAUDIO JOSE REIS DE CARVALHO, CPATU; RICARDO DE OLIVEIRA FIGUEIREDO, CPATU; Maria do Socorro A. Kato, CPATU; OSVALDO RYOHEI KATO, CPATU; Françoise Yoko Ishida, CENA. |
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Título: |
An integrated greenhouse gas assessment of an alternative to slash-and-burn agriculture in eastern Amazonia. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Global Change Biology, v. 14, Issue 5, p. 998-1111, 2008. |
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Descrição Física: |
il. |
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DOI: |
10.1111/j.1365-2486.2008.01542.x. |
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Idioma: |
Inglês |
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Conteúdo: |
Fires set for slash-and-burn agriculture contribute to the current unsustainable accumulation of atmospheric greenhouse gases, and they also deplete the soil of essential nutrients, which compromises agricultural sustainability at local scales. Integrated assessments of greenhouse gas emissions have compared intensive cropping systems in industrialized countries, but such assessments have not been applied to common cropping systems of smallholder farmers in developing countries. We report an integrated assessment of greenhouse gas emissions in slash-and-burn agriculture and an alternative chop-and-mulch system in the Amazon Basin. The soil consumed atmospheric methane (CH4) under slash-and-burn treatment and became a net emitter of CH4 to the atmosphere under the mulch treatment. Mulching also caused about a 50% increase in soil emissions of nitric oxide and nitrous oxide and required greater use of fertilizer and fuel for farm machinery. Despite these significantly higher emissions of greenhouse gases during the cropping phase under the alternative chop-and-mulch system, calculated pyrogenic emissions in the slash-and-burn system were much larger, especially for CH4. The global warming potential CO2-equivalent emissions calculated for the entire crop cycles were at least five times lower in chop-and-mulch compared with slash-and-burn. The crop yields were similar for the two systems. While economic and logistical considerations remain to be worked out for alternatives to slash-and-burn, these results demonstrate a potential 'win-win' strategy for maintaining soil fertility and reducing net greenhouse gas emissions, thus simultaneously contributing to sustainability at both spatial scales. MenosFires set for slash-and-burn agriculture contribute to the current unsustainable accumulation of atmospheric greenhouse gases, and they also deplete the soil of essential nutrients, which compromises agricultural sustainability at local scales. Integrated assessments of greenhouse gas emissions have compared intensive cropping systems in industrialized countries, but such assessments have not been applied to common cropping systems of smallholder farmers in developing countries. We report an integrated assessment of greenhouse gas emissions in slash-and-burn agriculture and an alternative chop-and-mulch system in the Amazon Basin. The soil consumed atmospheric methane (CH4) under slash-and-burn treatment and became a net emitter of CH4 to the atmosphere under the mulch treatment. Mulching also caused about a 50% increase in soil emissions of nitric oxide and nitrous oxide and required greater use of fertilizer and fuel for farm machinery. Despite these significantly higher emissions of greenhouse gases during the cropping phase under the alternative chop-and-mulch system, calculated pyrogenic emissions in the slash-and-burn system were much larger, especially for CH4. The global warming potential CO2-equivalent emissions calculated for the entire crop cycles were at least five times lower in chop-and-mulch compared with slash-and-burn. The crop yields were similar for the two systems. While economic and logistical considerations remain to be worked out for alternatives to sl... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Tipitamba. |
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Thesagro: |
Agricultura; Biomassa; Gás; Solo. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
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001 1409915
005 2022-11-22
008 2008 bl uuuu u00u1 u #d
024 7 $a10.1111/j.1365-2486.2008.01542.x.$2DOI
100 1 $aDAVIDSON, E.
245 $aAn integrated greenhouse gas assessment of an alternative to slash-and-burn agriculture in eastern Amazonia.$h[electronic resource]
260 $c2008
300 $cil.
520 $aFires set for slash-and-burn agriculture contribute to the current unsustainable accumulation of atmospheric greenhouse gases, and they also deplete the soil of essential nutrients, which compromises agricultural sustainability at local scales. Integrated assessments of greenhouse gas emissions have compared intensive cropping systems in industrialized countries, but such assessments have not been applied to common cropping systems of smallholder farmers in developing countries. We report an integrated assessment of greenhouse gas emissions in slash-and-burn agriculture and an alternative chop-and-mulch system in the Amazon Basin. The soil consumed atmospheric methane (CH4) under slash-and-burn treatment and became a net emitter of CH4 to the atmosphere under the mulch treatment. Mulching also caused about a 50% increase in soil emissions of nitric oxide and nitrous oxide and required greater use of fertilizer and fuel for farm machinery. Despite these significantly higher emissions of greenhouse gases during the cropping phase under the alternative chop-and-mulch system, calculated pyrogenic emissions in the slash-and-burn system were much larger, especially for CH4. The global warming potential CO2-equivalent emissions calculated for the entire crop cycles were at least five times lower in chop-and-mulch compared with slash-and-burn. The crop yields were similar for the two systems. While economic and logistical considerations remain to be worked out for alternatives to slash-and-burn, these results demonstrate a potential 'win-win' strategy for maintaining soil fertility and reducing net greenhouse gas emissions, thus simultaneously contributing to sustainability at both spatial scales.
650 $aAmazonia
650 $aAgricultura
650 $aBiomassa
650 $aGás
650 $aSolo
653 $aBrasil
653 $aTipitamba
700 1 $aSA, T. D. de A.
700 1 $aCARVALHO, C. J. R. de
700 1 $aFIGUEIREDO, R. de O.
700 1 $aKATO, M. do S. A.
700 1 $aKATO, O. R.
700 1 $aISHIDA, F. Y.
773 $tGlobal Change Biology$gv. 14, Issue 5, p. 998-1111, 2008.
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