Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado.
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/1059229 |
Resumo: | Abstract: In Brazil?s central savanna region, government policy is to encourage the conversion of conventional plough tillage (PT) agriculture to no-till (NT) and raise the productivity of under-utilized pastures, including their conversion to integrated crop-livestock (ICL) systems, with the objective of increasing soil organic carbon (SOC) at the expense of atmospheric carbon dioxide. An experiment was established in 1991 by liming and fertilizing at two levels an area of native vegetation (NV). The treatments, replicated in randomized plots, included pastures, continuous cropping and ICL systems under PT or NT. The aim of this study was to quantify the SOC accumulation to 100 cm depth under these treatments over time. The high C:N ratios suggested that there was a high proportion of charcoal present in the soil. Increasing fertilizer inputs had no overall significant effect on SOC stocks. Stocks of SOC changed little under pastures. Analyses of ¹³C abundance showed that higher fertilizer inputs increased the decomposition rate of C derived from NV under pure grass pastures. Continuous cropping under NT preserved SOC and under PT there were significant losses. The highest SOC stocks were found under ILP treatments, but not all ILP treatments accumulated SOC even under NT. These results indicate that government initiatives to substitute PT with NT and to intensify beef cattle production will have only modest short-term gains in SOC accumulation. |
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Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado.Abundância de CarbonoSequestro de carbonoSistema de criação de gado integradoPastagens tropicaisCerradoCarvãoLeguminosa ForrageiraSoloAbstract: In Brazil?s central savanna region, government policy is to encourage the conversion of conventional plough tillage (PT) agriculture to no-till (NT) and raise the productivity of under-utilized pastures, including their conversion to integrated crop-livestock (ICL) systems, with the objective of increasing soil organic carbon (SOC) at the expense of atmospheric carbon dioxide. An experiment was established in 1991 by liming and fertilizing at two levels an area of native vegetation (NV). The treatments, replicated in randomized plots, included pastures, continuous cropping and ICL systems under PT or NT. The aim of this study was to quantify the SOC accumulation to 100 cm depth under these treatments over time. The high C:N ratios suggested that there was a high proportion of charcoal present in the soil. Increasing fertilizer inputs had no overall significant effect on SOC stocks. Stocks of SOC changed little under pastures. Analyses of ¹³C abundance showed that higher fertilizer inputs increased the decomposition rate of C derived from NV under pure grass pastures. Continuous cropping under NT preserved SOC and under PT there were significant losses. The highest SOC stocks were found under ILP treatments, but not all ILP treatments accumulated SOC even under NT. These results indicate that government initiatives to substitute PT with NT and to intensify beef cattle production will have only modest short-term gains in SOC accumulation.Selenobaldo A. C. de Sant-Anna, Universidade Federal Rural do Rio de Janeiro; CLAUDIA POZZI JANTALIA, CNPAB; Jerusa M. Sa, Universidade Federal Rural do Rio de Janeiro; LOURIVAL VILELA, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; BRUNO JOSE RODRIGUES ALVES, CNPAB; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; ROBERT MICHAEL BODDEY, CNPAB.SANTA-ANNA, S. A. C. deJANTALIA, C. P.SA, J. M.VILELA, L.MARCHAO, R. L.ALVES, B. J. R.URQUIAGA, S.BODDEY, R. M.2016-12-23T11:11:11Z2016-12-23T11:11:11Z2016-12-2320162017-01-09T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article20 p.Nutrient Cycling in Agroecosystems, December 2016.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059229enginfo: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:EMBRAPA2017-08-16T03:57:41Zoai:www.alice.cnptia.embrapa.br:doc/1059229Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T03:57:41falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T03:57:41Repositório 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 |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. |
title |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. |
spellingShingle |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. SANTA-ANNA, S. A. C. de Abundância de Carbono Sequestro de carbono Sistema de criação de gado integrado Pastagens tropicais Cerrado Carvão Leguminosa Forrageira Solo |
title_short |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. |
title_full |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. |
title_fullStr |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. |
title_full_unstemmed |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. |
title_sort |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. |
author |
SANTA-ANNA, S. A. C. de |
author_facet |
SANTA-ANNA, S. A. C. de JANTALIA, C. P. SA, J. M. VILELA, L. MARCHAO, R. L. ALVES, B. J. R. URQUIAGA, S. BODDEY, R. M. |
author_role |
author |
author2 |
JANTALIA, C. P. SA, J. M. VILELA, L. MARCHAO, R. L. ALVES, B. J. R. URQUIAGA, S. BODDEY, R. M. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Selenobaldo A. C. de Sant-Anna, Universidade Federal Rural do Rio de Janeiro; CLAUDIA POZZI JANTALIA, CNPAB; Jerusa M. Sa, Universidade Federal Rural do Rio de Janeiro; LOURIVAL VILELA, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; BRUNO JOSE RODRIGUES ALVES, CNPAB; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; ROBERT MICHAEL BODDEY, CNPAB. |
dc.contributor.author.fl_str_mv |
SANTA-ANNA, S. A. C. de JANTALIA, C. P. SA, J. M. VILELA, L. MARCHAO, R. L. ALVES, B. J. R. URQUIAGA, S. BODDEY, R. M. |
dc.subject.por.fl_str_mv |
Abundância de Carbono Sequestro de carbono Sistema de criação de gado integrado Pastagens tropicais Cerrado Carvão Leguminosa Forrageira Solo |
topic |
Abundância de Carbono Sequestro de carbono Sistema de criação de gado integrado Pastagens tropicais Cerrado Carvão Leguminosa Forrageira Solo |
description |
Abstract: In Brazil?s central savanna region, government policy is to encourage the conversion of conventional plough tillage (PT) agriculture to no-till (NT) and raise the productivity of under-utilized pastures, including their conversion to integrated crop-livestock (ICL) systems, with the objective of increasing soil organic carbon (SOC) at the expense of atmospheric carbon dioxide. An experiment was established in 1991 by liming and fertilizing at two levels an area of native vegetation (NV). The treatments, replicated in randomized plots, included pastures, continuous cropping and ICL systems under PT or NT. The aim of this study was to quantify the SOC accumulation to 100 cm depth under these treatments over time. The high C:N ratios suggested that there was a high proportion of charcoal present in the soil. Increasing fertilizer inputs had no overall significant effect on SOC stocks. Stocks of SOC changed little under pastures. Analyses of ¹³C abundance showed that higher fertilizer inputs increased the decomposition rate of C derived from NV under pure grass pastures. Continuous cropping under NT preserved SOC and under PT there were significant losses. The highest SOC stocks were found under ILP treatments, but not all ILP treatments accumulated SOC even under NT. These results indicate that government initiatives to substitute PT with NT and to intensify beef cattle production will have only modest short-term gains in SOC accumulation. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12-23T11:11:11Z 2016-12-23T11:11:11Z 2016-12-23 2016 2017-01-09T11:11:11Z |
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 |
Nutrient Cycling in Agroecosystems, December 2016. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059229 |
identifier_str_mv |
Nutrient Cycling in Agroecosystems, December 2016. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059229 |
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.format.none.fl_str_mv |
20 p. |
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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1794503430153175040 |