Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/12856 |
Resumo: | The objective of this work was to evaluate the impact of the conversion of native forests into cultivated pasture, and exposure of native pasture to continuous grazing, on the C and N stocks in the soil, in the Brazilian Pantanal wetlands. Three remnants of native forest, three areas with Urochloa decumbens pastures at different ages of formation, and one native pasture submitted to continuous grazing and without grazing for 3 and 19 years were evaluated. Soil samples were collected at 0–10, 10–20 and 20–40 cm depths, with three replications. The conversion of native forests into pastures promoted reduction of organic carbon and microbial carbon stocks in the soil, mainly in cultivated pastures with longer implantation time. However, no alteration in the total N stocks was observed. Carbon stock losses occurred in the three humic fractions but, proportionally, the main losses occurred in the humic and fulvic acid fractions. Cultivated and native pastures under continuous grazing are not capable of accumulating more C in the soil than the natural ecosystems. |
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Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma PantanalCarbon and nitrogen stocks in soil in native forests and pasture in the Pantanal biome, BrazilDesmatamento – PantanalÁcidos húmicosSeqüestro de carbonoÁreas inundáveisDeforestation – PantanalHumic acidsCarbon sequestrationWetlandsThe objective of this work was to evaluate the impact of the conversion of native forests into cultivated pasture, and exposure of native pasture to continuous grazing, on the C and N stocks in the soil, in the Brazilian Pantanal wetlands. Three remnants of native forest, three areas with Urochloa decumbens pastures at different ages of formation, and one native pasture submitted to continuous grazing and without grazing for 3 and 19 years were evaluated. Soil samples were collected at 0–10, 10–20 and 20–40 cm depths, with three replications. The conversion of native forests into pastures promoted reduction of organic carbon and microbial carbon stocks in the soil, mainly in cultivated pastures with longer implantation time. However, no alteration in the total N stocks was observed. Carbon stock losses occurred in the three humic fractions but, proportionally, the main losses occurred in the humic and fulvic acid fractions. Cultivated and native pastures under continuous grazing are not capable of accumulating more C in the soil than the natural ecosystems.O objetivo deste trabalho foi avaliar o impacto da conversão da floresta nativa em pastagem cultivada, e exposição da pastagem nativa ao sistema de pastejo contínuo, sobre os estoques de C e N no solo, em ecossistemas naturais do Pantanal. Foram avaliados três remanescentes de floresta nativa, três áreas de pastagens de Urochloa decumbens com diferentes idades de formação, e uma pastagem nativa submetida ao sistema de pastejo contínuo e sem pastejo, por 3 e 19 anos. Amostras de solo foram coletadas nas profundidades de 0–10, 10–20 e 20–40 cm, com três repetições. A conversão de florestas em pastagens promoveu redução nos estoques de carbono orgânico e carbono microbiano no solo, principalmente nas pastagens cultivadas há mais tempo. Contudo, não houve alteração nos estoques de nitrogênio total. As perdas nos estoques de carbono ocorreram nas três frações húmicas, mas, proporcionalmente, as maiores perdas ocorreram nas frações ácidos húmicos e fúlvicos. As pastagens cultivadas e nativas, sob pastejo contínuo, não são capazes de acumular mais carbono no solo do que os ecossistemas naturais.Empresa Brasileira de Pesquisa Agropecuária2017-05-09T18:01:14Z2017-05-09T18:01:14Z2010-09info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfCARDOSO, E. L. et al. Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal. Pesquisa Agropecuária Brasileira, Brasília, v. 45, n. 9, p. 1028-1035, set. 2010.http://repositorio.ufla.br/jspui/handle/1/12856Pesquisa Agropecuária Brasileirareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLACardoso, Evaldo LuisSilva, Marx Leandro NavesSilva, Carlos AlbertoCuri, NiltonFreitas, Diego Antônio França deinfo:eu-repo/semantics/openAccesspor2017-05-09T18:01:14Zoai:localhost:1/12856Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2017-05-09T18:01:14Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal Carbon and nitrogen stocks in soil in native forests and pasture in the Pantanal biome, Brazil |
title |
Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal |
spellingShingle |
Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal Cardoso, Evaldo Luis Desmatamento – Pantanal Ácidos húmicos Seqüestro de carbono Áreas inundáveis Deforestation – Pantanal Humic acids Carbon sequestration Wetlands |
title_short |
Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal |
title_full |
Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal |
title_fullStr |
Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal |
title_full_unstemmed |
Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal |
title_sort |
Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal |
author |
Cardoso, Evaldo Luis |
author_facet |
Cardoso, Evaldo Luis Silva, Marx Leandro Naves Silva, Carlos Alberto Curi, Nilton Freitas, Diego Antônio França de |
author_role |
author |
author2 |
Silva, Marx Leandro Naves Silva, Carlos Alberto Curi, Nilton Freitas, Diego Antônio França de |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Cardoso, Evaldo Luis Silva, Marx Leandro Naves Silva, Carlos Alberto Curi, Nilton Freitas, Diego Antônio França de |
dc.subject.por.fl_str_mv |
Desmatamento – Pantanal Ácidos húmicos Seqüestro de carbono Áreas inundáveis Deforestation – Pantanal Humic acids Carbon sequestration Wetlands |
topic |
Desmatamento – Pantanal Ácidos húmicos Seqüestro de carbono Áreas inundáveis Deforestation – Pantanal Humic acids Carbon sequestration Wetlands |
description |
The objective of this work was to evaluate the impact of the conversion of native forests into cultivated pasture, and exposure of native pasture to continuous grazing, on the C and N stocks in the soil, in the Brazilian Pantanal wetlands. Three remnants of native forest, three areas with Urochloa decumbens pastures at different ages of formation, and one native pasture submitted to continuous grazing and without grazing for 3 and 19 years were evaluated. Soil samples were collected at 0–10, 10–20 and 20–40 cm depths, with three replications. The conversion of native forests into pastures promoted reduction of organic carbon and microbial carbon stocks in the soil, mainly in cultivated pastures with longer implantation time. However, no alteration in the total N stocks was observed. Carbon stock losses occurred in the three humic fractions but, proportionally, the main losses occurred in the humic and fulvic acid fractions. Cultivated and native pastures under continuous grazing are not capable of accumulating more C in the soil than the natural ecosystems. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-09 2017-05-09T18:01:14Z 2017-05-09T18:01:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
CARDOSO, E. L. et al. Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal. Pesquisa Agropecuária Brasileira, Brasília, v. 45, n. 9, p. 1028-1035, set. 2010. http://repositorio.ufla.br/jspui/handle/1/12856 |
identifier_str_mv |
CARDOSO, E. L. et al. Estoques de carbono e nitrogênio em solo sob florestas nativas e pastagens no bioma Pantanal. Pesquisa Agropecuária Brasileira, Brasília, v. 45, n. 9, p. 1028-1035, set. 2010. |
url |
http://repositorio.ufla.br/jspui/handle/1/12856 |
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.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Empresa Brasileira de Pesquisa Agropecuária |
publisher.none.fl_str_mv |
Empresa Brasileira de Pesquisa Agropecuária |
dc.source.none.fl_str_mv |
Pesquisa Agropecuária Brasileira reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
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1784550130458820608 |