Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review.
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
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/1049007 |
Resumo: | Brazil typifies the land use changes happening in South America, where natural vegetation is continuously converted into agriculturally used lands, such as cattle pastures and croplands. Such changes in land use are always associated with changes in the soil nutrient cycles and result in altered greenhouse gas fluxes from the soil to the atmosphere. In this study, we analyzed literature values to extract patterns of direct nitrous oxide (N2O) emissions from soils of different ecosystems in Brazil. Fluxes from natural ecosystems exhibited a wide range: whereas median annual flux rates were highest in Amazonian and Atlantic rainforests (2.42 and 0.88 kg N ha-1), emissions from cerrado soils were close to zero. The decrease in emissions from pastures with increasing time after conversion was associated with pasture degradation. We found comparatively low N2O-N fluxes from croplands (-0.07 to 4.26 kg N ha-1 yr-1 , median 0.80 kg N ha-1 yr-1) and a low response to N fertilization. Contrary to the assumptions, soil parameters, such as pH, Corg, and clay content emerged as poor predictors for N2O fluxes. This could be a result of the formation of micro-aggregates, which strongly affect the hydraulic properties of the soil, and consequently define nitrification and denitrification potentials. Since data from croplands mainly derived from areas that had been under natural cerrado vegetation before, it could explain the low emissions under agriculture. Measurements must be more frequent and regionally spread in order to enable sound national estimates. |
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Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review.Micro-aggregationN2OfluxesSoloLand use changeSoilBrazil typifies the land use changes happening in South America, where natural vegetation is continuously converted into agriculturally used lands, such as cattle pastures and croplands. Such changes in land use are always associated with changes in the soil nutrient cycles and result in altered greenhouse gas fluxes from the soil to the atmosphere. In this study, we analyzed literature values to extract patterns of direct nitrous oxide (N2O) emissions from soils of different ecosystems in Brazil. Fluxes from natural ecosystems exhibited a wide range: whereas median annual flux rates were highest in Amazonian and Atlantic rainforests (2.42 and 0.88 kg N ha-1), emissions from cerrado soils were close to zero. The decrease in emissions from pastures with increasing time after conversion was associated with pasture degradation. We found comparatively low N2O-N fluxes from croplands (-0.07 to 4.26 kg N ha-1 yr-1 , median 0.80 kg N ha-1 yr-1) and a low response to N fertilization. Contrary to the assumptions, soil parameters, such as pH, Corg, and clay content emerged as poor predictors for N2O fluxes. This could be a result of the formation of micro-aggregates, which strongly affect the hydraulic properties of the soil, and consequently define nitrification and denitrification potentials. Since data from croplands mainly derived from areas that had been under natural cerrado vegetation before, it could explain the low emissions under agriculture. Measurements must be more frequent and regionally spread in order to enable sound national estimates.HATHARINA H. E. MEURER, HELMHOLTZ CENTRE FOR ENVIRONMENTAL RESEARCH, HALLE, GE; UWE FRANKO, FEDERAL INSTITUTE FOR GEOSCIENCES AND NATURAL RESOURCES, HANNOVER, GE; CLAUS F. STANGE, FEDERAL INSTITUTE FOR GEOSCIENCES AND NATURAL RESOURCES, HANNOVER, GE; JAQUELINE DALLA ROSA, BOLSISTA EMBRAPA AGROBIOLOGIA; BEATA EMOKE MADARI, CNPAF; HERMANN F. JUNGKUNST, UNIVERSITY OF LOBLENZ, LANDAU, GE.MEURER, K. H. E.FRANKO, U.STANGE, C. F.DALLA ROSA, J.MADARI, B. E.JUNGKUNST, H. F.2016-07-18T11:11:11Z2016-07-18T11:11:11Z2016-07-1820162017-03-01T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleEnvironmental Research Letters, v. 11, 023001, 2016.http://www.alice.cnptia.embrapa.br/alice/handle/doc/104900710.1088/1748-9326/11/2/023001enginfo: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:EMBRAPA2017-08-16T03:37:46Zoai:www.alice.cnptia.embrapa.br:doc/1049007Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T03:37:46falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T03:37:46Repositório 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 |
Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review. |
title |
Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review. |
spellingShingle |
Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review. MEURER, K. H. E. Micro-aggregation N2Ofluxes Solo Land use change Soil |
title_short |
Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review. |
title_full |
Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review. |
title_fullStr |
Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review. |
title_full_unstemmed |
Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review. |
title_sort |
Direct nitrous oxide (N2O) fluxes from soils under different land use in Brazil: a critical review. |
author |
MEURER, K. H. E. |
author_facet |
MEURER, K. H. E. FRANKO, U. STANGE, C. F. DALLA ROSA, J. MADARI, B. E. JUNGKUNST, H. F. |
author_role |
author |
author2 |
FRANKO, U. STANGE, C. F. DALLA ROSA, J. MADARI, B. E. JUNGKUNST, H. F. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
HATHARINA H. E. MEURER, HELMHOLTZ CENTRE FOR ENVIRONMENTAL RESEARCH, HALLE, GE; UWE FRANKO, FEDERAL INSTITUTE FOR GEOSCIENCES AND NATURAL RESOURCES, HANNOVER, GE; CLAUS F. STANGE, FEDERAL INSTITUTE FOR GEOSCIENCES AND NATURAL RESOURCES, HANNOVER, GE; JAQUELINE DALLA ROSA, BOLSISTA EMBRAPA AGROBIOLOGIA; BEATA EMOKE MADARI, CNPAF; HERMANN F. JUNGKUNST, UNIVERSITY OF LOBLENZ, LANDAU, GE. |
dc.contributor.author.fl_str_mv |
MEURER, K. H. E. FRANKO, U. STANGE, C. F. DALLA ROSA, J. MADARI, B. E. JUNGKUNST, H. F. |
dc.subject.por.fl_str_mv |
Micro-aggregation N2Ofluxes Solo Land use change Soil |
topic |
Micro-aggregation N2Ofluxes Solo Land use change Soil |
description |
Brazil typifies the land use changes happening in South America, where natural vegetation is continuously converted into agriculturally used lands, such as cattle pastures and croplands. Such changes in land use are always associated with changes in the soil nutrient cycles and result in altered greenhouse gas fluxes from the soil to the atmosphere. In this study, we analyzed literature values to extract patterns of direct nitrous oxide (N2O) emissions from soils of different ecosystems in Brazil. Fluxes from natural ecosystems exhibited a wide range: whereas median annual flux rates were highest in Amazonian and Atlantic rainforests (2.42 and 0.88 kg N ha-1), emissions from cerrado soils were close to zero. The decrease in emissions from pastures with increasing time after conversion was associated with pasture degradation. We found comparatively low N2O-N fluxes from croplands (-0.07 to 4.26 kg N ha-1 yr-1 , median 0.80 kg N ha-1 yr-1) and a low response to N fertilization. Contrary to the assumptions, soil parameters, such as pH, Corg, and clay content emerged as poor predictors for N2O fluxes. This could be a result of the formation of micro-aggregates, which strongly affect the hydraulic properties of the soil, and consequently define nitrification and denitrification potentials. Since data from croplands mainly derived from areas that had been under natural cerrado vegetation before, it could explain the low emissions under agriculture. Measurements must be more frequent and regionally spread in order to enable sound national estimates. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-07-18T11:11:11Z 2016-07-18T11:11:11Z 2016-07-18 2016 2017-03-01T11:11:11Z |
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 |
Environmental Research Letters, v. 11, 023001, 2016. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1049007 10.1088/1748-9326/11/2/023001 |
identifier_str_mv |
Environmental Research Letters, v. 11, 023001, 2016. 10.1088/1748-9326/11/2/023001 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1049007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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) |
instacron_str |
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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1794503424214040576 |