Soil carbon stock and humification in pastures under different levels of intensification in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | https://www.revistas.usp.br/sa/article/view/154145 |
Resumo: | Intensive management of tropical pastures has shown potential for greenhouse gas (GHG) mitigation due to high forage production and C accumulation in the soil. This study aimed to evaluate different pasture management options in relation to their effect on soil C stocks and soil organic matter (SOM) humification. Pastures in four beef cattle production systems were assessed: intensive and irrigated pasture with high stocking rate (IHS); dryland pasture with high stocking rate (DHS); dryland pasture with moderate stocking rate (DMS); degraded pasture (DP). The soil under the native forest was also evaluated and soil carbon stocks from the 0-100 and 0-30 cm layers were assessed. Carbon stocks (0-100 cm) ranged from 99.88 to 142.33 Mg ha–1 in DP and DMS, respectively and were, respectively, 14 % and 24 % higher compared to the soil under the forest and indicate the capacity of adequately managed tropical pastures to mitigate GHG emissions from livestock production. Humification indexes indicated the presence of more labile C in pastures with greater C accumulation (DHS and DMS), mainly in the upper soil layers, indicating recent C accumulation resulting from correct management. However, more labile C can be easily lost to the atmosphere as CO2, depending on pasture management. Low C stocks associated with high humification indexes are characteristics of DP in which significant amounts of SOM are lost. It is necessary to develop technologies to improve C sequestration in IHS and results indicate the importance of quantifying C stocks in association with C stability. |
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Soil carbon stock and humification in pastures under different levels of intensification in BrazilAtlantic Forest biomeBrazilian livestock systemsLaser-Induced Fluorescence Spectroscopyhumification indexorganic matterIntensive management of tropical pastures has shown potential for greenhouse gas (GHG) mitigation due to high forage production and C accumulation in the soil. This study aimed to evaluate different pasture management options in relation to their effect on soil C stocks and soil organic matter (SOM) humification. Pastures in four beef cattle production systems were assessed: intensive and irrigated pasture with high stocking rate (IHS); dryland pasture with high stocking rate (DHS); dryland pasture with moderate stocking rate (DMS); degraded pasture (DP). The soil under the native forest was also evaluated and soil carbon stocks from the 0-100 and 0-30 cm layers were assessed. Carbon stocks (0-100 cm) ranged from 99.88 to 142.33 Mg ha–1 in DP and DMS, respectively and were, respectively, 14 % and 24 % higher compared to the soil under the forest and indicate the capacity of adequately managed tropical pastures to mitigate GHG emissions from livestock production. Humification indexes indicated the presence of more labile C in pastures with greater C accumulation (DHS and DMS), mainly in the upper soil layers, indicating recent C accumulation resulting from correct management. However, more labile C can be easily lost to the atmosphere as CO2, depending on pasture management. Low C stocks associated with high humification indexes are characteristics of DP in which significant amounts of SOM are lost. It is necessary to develop technologies to improve C sequestration in IHS and results indicate the importance of quantifying C stocks in association with C stability.Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz2019-01-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/sa/article/view/15414510.1590/1678-992x-2017-0131Scientia Agricola; v. 76 n. 1 (2019); 33-40Scientia Agricola; Vol. 76 No. 1 (2019); 33-40Scientia Agricola; Vol. 76 Núm. 1 (2019); 33-401678-992X0103-9016reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/sa/article/view/154145/150382Copyright (c) 2019 Scientia Agricolainfo:eu-repo/semantics/openAccessSegnini, AlineXavier, Alfredo Augusto PereiraOtaviani-Junior, Pedro LuisOliveira, Patrícia Perondi AnchãoPedroso, André de FariaPraes, Maria Fernanda Ferreira MenegucciRodrigues, Paulo Henrique MazzaMilori, Débora Marcondes Bastos Pereira2019-02-04T13:50:02Zoai:revistas.usp.br:article/154145Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2019-02-04T13:50:02Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Soil carbon stock and humification in pastures under different levels of intensification in Brazil |
title |
Soil carbon stock and humification in pastures under different levels of intensification in Brazil |
spellingShingle |
Soil carbon stock and humification in pastures under different levels of intensification in Brazil Segnini, Aline Atlantic Forest biome Brazilian livestock systems Laser-Induced Fluorescence Spectroscopy humification index organic matter |
title_short |
Soil carbon stock and humification in pastures under different levels of intensification in Brazil |
title_full |
Soil carbon stock and humification in pastures under different levels of intensification in Brazil |
title_fullStr |
Soil carbon stock and humification in pastures under different levels of intensification in Brazil |
title_full_unstemmed |
Soil carbon stock and humification in pastures under different levels of intensification in Brazil |
title_sort |
Soil carbon stock and humification in pastures under different levels of intensification in Brazil |
author |
Segnini, Aline |
author_facet |
Segnini, Aline Xavier, Alfredo Augusto Pereira Otaviani-Junior, Pedro Luis Oliveira, Patrícia Perondi Anchão Pedroso, André de Faria Praes, Maria Fernanda Ferreira Menegucci Rodrigues, Paulo Henrique Mazza Milori, Débora Marcondes Bastos Pereira |
author_role |
author |
author2 |
Xavier, Alfredo Augusto Pereira Otaviani-Junior, Pedro Luis Oliveira, Patrícia Perondi Anchão Pedroso, André de Faria Praes, Maria Fernanda Ferreira Menegucci Rodrigues, Paulo Henrique Mazza Milori, Débora Marcondes Bastos Pereira |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Segnini, Aline Xavier, Alfredo Augusto Pereira Otaviani-Junior, Pedro Luis Oliveira, Patrícia Perondi Anchão Pedroso, André de Faria Praes, Maria Fernanda Ferreira Menegucci Rodrigues, Paulo Henrique Mazza Milori, Débora Marcondes Bastos Pereira |
dc.subject.por.fl_str_mv |
Atlantic Forest biome Brazilian livestock systems Laser-Induced Fluorescence Spectroscopy humification index organic matter |
topic |
Atlantic Forest biome Brazilian livestock systems Laser-Induced Fluorescence Spectroscopy humification index organic matter |
description |
Intensive management of tropical pastures has shown potential for greenhouse gas (GHG) mitigation due to high forage production and C accumulation in the soil. This study aimed to evaluate different pasture management options in relation to their effect on soil C stocks and soil organic matter (SOM) humification. Pastures in four beef cattle production systems were assessed: intensive and irrigated pasture with high stocking rate (IHS); dryland pasture with high stocking rate (DHS); dryland pasture with moderate stocking rate (DMS); degraded pasture (DP). The soil under the native forest was also evaluated and soil carbon stocks from the 0-100 and 0-30 cm layers were assessed. Carbon stocks (0-100 cm) ranged from 99.88 to 142.33 Mg ha–1 in DP and DMS, respectively and were, respectively, 14 % and 24 % higher compared to the soil under the forest and indicate the capacity of adequately managed tropical pastures to mitigate GHG emissions from livestock production. Humification indexes indicated the presence of more labile C in pastures with greater C accumulation (DHS and DMS), mainly in the upper soil layers, indicating recent C accumulation resulting from correct management. However, more labile C can be easily lost to the atmosphere as CO2, depending on pasture management. Low C stocks associated with high humification indexes are characteristics of DP in which significant amounts of SOM are lost. It is necessary to develop technologies to improve C sequestration in IHS and results indicate the importance of quantifying C stocks in association with C stability. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/sa/article/view/154145 10.1590/1678-992x-2017-0131 |
url |
https://www.revistas.usp.br/sa/article/view/154145 |
identifier_str_mv |
10.1590/1678-992x-2017-0131 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/sa/article/view/154145/150382 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Scientia Agricola info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Scientia Agricola |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz |
publisher.none.fl_str_mv |
Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz |
dc.source.none.fl_str_mv |
Scientia Agricola; v. 76 n. 1 (2019); 33-40 Scientia Agricola; Vol. 76 No. 1 (2019); 33-40 Scientia Agricola; Vol. 76 Núm. 1 (2019); 33-40 1678-992X 0103-9016 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1787713261581369344 |