From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia.
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1036013 http://doi.dx.org/1518-279710.1111/gcb.12906 |
Resumo: | Abstract - The impact of deforestation on soil organic carbon (SOC) stocks is important in the context of climate change and agricultural soil use. Trends of SOC stock changes after agroecosystem establishment vary according to the spatial scale considered, and factors explaining these trends may differ sometimes according to meta-analyses. We have reviewed the knowledge about changes in SOC stocks in Amazonia after the establishment of pasture or cropland, sought relationships between observed changes and soil, climatic variables and management practices, and synthesized the ?13C measured in pastures. Our dataset consisted of 21 studies mostly synchronic, across 52 sites (Brazil, Colombia, French Guiana, Suriname), totalling 70 forest?agroecosystem comparisons. We found that pastures (n = 52, mean age = 17.6 years) had slightly higher SOC stocks than forest (+6.8 ± 3.1 %), whereas croplands (n = 18, mean age = 8.7 years) had lower SOC stocks than forest (?8.5 ± 2.9 %). Annual precipitation and SOC stocks under forest had no effect on the SOC changes in the agroecosystems. For croplands, we found a lower SOC loss than other meta-analyses, but the short time period after deforestation here could have reduced this loss. There was no clear effect of tillage on the SOC response. Management of pastures, whether they were degraded/nominal/improved, had no significant effect on SOC response. ?13C measurements on 16 pasture chronosequences showed that decay of forest-derived SOC was variable, whereas pasture-derived SOC was less so and was characterized by an accumulation plateau of 20 Mg SOC ha?1 after 20 years. The large uncertainties in SOC response observed could be derived from the chronosequence approach, sensitive to natural soil variability and to human management practices. This study emphasizes the need for diachronic and long-term studies, associated with better knowledge of agroecosystem management. |
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From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia.Annual cropCarbon storageChronosequenceGrasslandRainforestSoil tillagedeforestationhumid tropicssoil organic matterAbstract - The impact of deforestation on soil organic carbon (SOC) stocks is important in the context of climate change and agricultural soil use. Trends of SOC stock changes after agroecosystem establishment vary according to the spatial scale considered, and factors explaining these trends may differ sometimes according to meta-analyses. We have reviewed the knowledge about changes in SOC stocks in Amazonia after the establishment of pasture or cropland, sought relationships between observed changes and soil, climatic variables and management practices, and synthesized the ?13C measured in pastures. Our dataset consisted of 21 studies mostly synchronic, across 52 sites (Brazil, Colombia, French Guiana, Suriname), totalling 70 forest?agroecosystem comparisons. We found that pastures (n = 52, mean age = 17.6 years) had slightly higher SOC stocks than forest (+6.8 ± 3.1 %), whereas croplands (n = 18, mean age = 8.7 years) had lower SOC stocks than forest (?8.5 ± 2.9 %). Annual precipitation and SOC stocks under forest had no effect on the SOC changes in the agroecosystems. For croplands, we found a lower SOC loss than other meta-analyses, but the short time period after deforestation here could have reduced this loss. There was no clear effect of tillage on the SOC response. Management of pastures, whether they were degraded/nominal/improved, had no significant effect on SOC response. ?13C measurements on 16 pasture chronosequences showed that decay of forest-derived SOC was variable, whereas pasture-derived SOC was less so and was characterized by an accumulation plateau of 20 Mg SOC ha?1 after 20 years. The large uncertainties in SOC response observed could be derived from the chronosequence approach, sensitive to natural soil variability and to human management practices. This study emphasizes the need for diachronic and long-term studies, associated with better knowledge of agroecosystem management.LUIZ CARLOS BALBINO, CPAC.FUJISAKI, K.PERRIN, A.-S.DESJARDINS, T.BERNOUX, M.BALBINO, L. C.BROSSARD, M.2016-02-03T11:11:11Z2016-02-03T11:11:11Z2016-02-0320152016-02-03T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleGlobal Change Biology, v. 21, n. 7, p. 2773-2786, Jul. 2015.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1036013http://doi.dx.org/1518-279710.1111/gcb.12906porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T03:39:49Zoai:www.alice.cnptia.embrapa.br:doc/1036013Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T03:39:49falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T03:39:49Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia. |
title |
From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia. |
spellingShingle |
From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia. FUJISAKI, K. Annual crop Carbon storage Chronosequence Grassland Rainforest Soil tillage deforestation humid tropics soil organic matter |
title_short |
From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia. |
title_full |
From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia. |
title_fullStr |
From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia. |
title_full_unstemmed |
From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia. |
title_sort |
From forest to cropland and pasture systems: a critical review of soil organic carbon stocks changes in Amazonia. |
author |
FUJISAKI, K. |
author_facet |
FUJISAKI, K. PERRIN, A.-S. DESJARDINS, T. BERNOUX, M. BALBINO, L. C. BROSSARD, M. |
author_role |
author |
author2 |
PERRIN, A.-S. DESJARDINS, T. BERNOUX, M. BALBINO, L. C. BROSSARD, M. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
LUIZ CARLOS BALBINO, CPAC. |
dc.contributor.author.fl_str_mv |
FUJISAKI, K. PERRIN, A.-S. DESJARDINS, T. BERNOUX, M. BALBINO, L. C. BROSSARD, M. |
dc.subject.por.fl_str_mv |
Annual crop Carbon storage Chronosequence Grassland Rainforest Soil tillage deforestation humid tropics soil organic matter |
topic |
Annual crop Carbon storage Chronosequence Grassland Rainforest Soil tillage deforestation humid tropics soil organic matter |
description |
Abstract - The impact of deforestation on soil organic carbon (SOC) stocks is important in the context of climate change and agricultural soil use. Trends of SOC stock changes after agroecosystem establishment vary according to the spatial scale considered, and factors explaining these trends may differ sometimes according to meta-analyses. We have reviewed the knowledge about changes in SOC stocks in Amazonia after the establishment of pasture or cropland, sought relationships between observed changes and soil, climatic variables and management practices, and synthesized the ?13C measured in pastures. Our dataset consisted of 21 studies mostly synchronic, across 52 sites (Brazil, Colombia, French Guiana, Suriname), totalling 70 forest?agroecosystem comparisons. We found that pastures (n = 52, mean age = 17.6 years) had slightly higher SOC stocks than forest (+6.8 ± 3.1 %), whereas croplands (n = 18, mean age = 8.7 years) had lower SOC stocks than forest (?8.5 ± 2.9 %). Annual precipitation and SOC stocks under forest had no effect on the SOC changes in the agroecosystems. For croplands, we found a lower SOC loss than other meta-analyses, but the short time period after deforestation here could have reduced this loss. There was no clear effect of tillage on the SOC response. Management of pastures, whether they were degraded/nominal/improved, had no significant effect on SOC response. ?13C measurements on 16 pasture chronosequences showed that decay of forest-derived SOC was variable, whereas pasture-derived SOC was less so and was characterized by an accumulation plateau of 20 Mg SOC ha?1 after 20 years. The large uncertainties in SOC response observed could be derived from the chronosequence approach, sensitive to natural soil variability and to human management practices. This study emphasizes the need for diachronic and long-term studies, associated with better knowledge of agroecosystem management. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015 2016-02-03T11:11:11Z 2016-02-03T11:11:11Z 2016-02-03 2016-02-03T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Global Change Biology, v. 21, n. 7, p. 2773-2786, Jul. 2015. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1036013 http://doi.dx.org/1518-279710.1111/gcb.12906 |
identifier_str_mv |
Global Change Biology, v. 21, n. 7, p. 2773-2786, Jul. 2015. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1036013 http://doi.dx.org/1518-279710.1111/gcb.12906 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
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EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503417514688512 |