Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | https://www.revistas.usp.br/sa/article/view/130947 |
Resumo: | The purpose of this study was to determine the measured and simulated rates of soil organic carbon (SOC) change in Vertisols in short-term experiments when the tillage system is changed from traditional tillage (TT) to conservation tillage (CT). The study was conducted in plots in four locations in the state of Michoacán and two locations in the state of Guanajuato. In the SOC change simulation, the RothC-26.3 carbon model was evaluated with different C inputs to the soil (ET1-ET5). ET was the measured shoot biomass (SB) plus estimated rhizodeposition (RI). RI was tested at values of 10, 15, 18, 36 and 50 % total biomass (TB). The SOC changes were simulated with the best trial where ET3 = SB + (0.18*TB). Values for model efficiency and the coefficient of correlation were in the ranges of 0.56 to 0.75 and 0.79 to 0.92, respectively. The average rate of SOC change, measured and simulated, in the study period was 3.0 and 1.9 Mg ha−1 yr−1, respectively; later, in a simulation period of 45 years, SOC change was 1.2 ± 0.8. In particular, without making adjustments in the RothC parameters and with information on measured plant residue C inputs to the soil, it was possible to simulate changes in SOC with RothC and estimate trends over a period of more than 45 years. |
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Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC modelland use changeconservation agriculturecarbon sequesterThe purpose of this study was to determine the measured and simulated rates of soil organic carbon (SOC) change in Vertisols in short-term experiments when the tillage system is changed from traditional tillage (TT) to conservation tillage (CT). The study was conducted in plots in four locations in the state of Michoacán and two locations in the state of Guanajuato. In the SOC change simulation, the RothC-26.3 carbon model was evaluated with different C inputs to the soil (ET1-ET5). ET was the measured shoot biomass (SB) plus estimated rhizodeposition (RI). RI was tested at values of 10, 15, 18, 36 and 50 % total biomass (TB). The SOC changes were simulated with the best trial where ET3 = SB + (0.18*TB). Values for model efficiency and the coefficient of correlation were in the ranges of 0.56 to 0.75 and 0.79 to 0.92, respectively. The average rate of SOC change, measured and simulated, in the study period was 3.0 and 1.9 Mg ha−1 yr−1, respectively; later, in a simulation period of 45 years, SOC change was 1.2 ± 0.8. In particular, without making adjustments in the RothC parameters and with information on measured plant residue C inputs to the soil, it was possible to simulate changes in SOC with RothC and estimate trends over a period of more than 45 years.Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz2017-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/sa/article/view/13094710.1590/1678-992x-2015-0487Scientia Agricola; v. 74 n. 3 (2017); 235-241Scientia Agricola; Vol. 74 Núm. 3 (2017); 235-241Scientia Agricola; Vol. 74 No. 3 (2017); 235-2411678-992X0103-9016reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/sa/article/view/130947/127406Copyright (c) 2017 Scientia Agricolainfo:eu-repo/semantics/openAccessMolina, Lucila GonzálezMoreno Pérez, Esaú del C.Pérez, Aurelio Baéz2017-05-22T17:04:28Zoai:revistas.usp.br:article/130947Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2017-05-22T17:04:28Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model |
title |
Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model |
spellingShingle |
Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model Molina, Lucila González land use change conservation agriculture carbon sequester |
title_short |
Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model |
title_full |
Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model |
title_fullStr |
Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model |
title_full_unstemmed |
Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model |
title_sort |
Simulation of soil organic carbon changes in Vertisols under conservation tillage using the RothC model |
author |
Molina, Lucila González |
author_facet |
Molina, Lucila González Moreno Pérez, Esaú del C. Pérez, Aurelio Baéz |
author_role |
author |
author2 |
Moreno Pérez, Esaú del C. Pérez, Aurelio Baéz |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Molina, Lucila González Moreno Pérez, Esaú del C. Pérez, Aurelio Baéz |
dc.subject.por.fl_str_mv |
land use change conservation agriculture carbon sequester |
topic |
land use change conservation agriculture carbon sequester |
description |
The purpose of this study was to determine the measured and simulated rates of soil organic carbon (SOC) change in Vertisols in short-term experiments when the tillage system is changed from traditional tillage (TT) to conservation tillage (CT). The study was conducted in plots in four locations in the state of Michoacán and two locations in the state of Guanajuato. In the SOC change simulation, the RothC-26.3 carbon model was evaluated with different C inputs to the soil (ET1-ET5). ET was the measured shoot biomass (SB) plus estimated rhizodeposition (RI). RI was tested at values of 10, 15, 18, 36 and 50 % total biomass (TB). The SOC changes were simulated with the best trial where ET3 = SB + (0.18*TB). Values for model efficiency and the coefficient of correlation were in the ranges of 0.56 to 0.75 and 0.79 to 0.92, respectively. The average rate of SOC change, measured and simulated, in the study period was 3.0 and 1.9 Mg ha−1 yr−1, respectively; later, in a simulation period of 45 years, SOC change was 1.2 ± 0.8. In particular, without making adjustments in the RothC parameters and with information on measured plant residue C inputs to the soil, it was possible to simulate changes in SOC with RothC and estimate trends over a period of more than 45 years. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-06-01 |
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/130947 10.1590/1678-992x-2015-0487 |
url |
https://www.revistas.usp.br/sa/article/view/130947 |
identifier_str_mv |
10.1590/1678-992x-2015-0487 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/sa/article/view/130947/127406 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2017 Scientia Agricola info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2017 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. 74 n. 3 (2017); 235-241 Scientia Agricola; Vol. 74 Núm. 3 (2017); 235-241 Scientia Agricola; Vol. 74 No. 3 (2017); 235-241 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_ |
1800222793240936448 |