Diurnal variation of methane emission from a paddy field in Brazilian Southeast

Detalhes bibliográficos
Autor(a) principal: Lima,Magda Aparecida de
Data de Publicação: 2018
Outros Autores: Pazianotto,Ricardo Antonio Almeida, Villela,Omar Vieira, Paraíba,Lourival Costa
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Ciência Rural
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400251
Resumo: ABSTRACT: This study aimed to investigate the diurnal variation of methane (CH4) emission in a flooded-irrigated rice field at different stages of the plant development under tropical climate in three growing seasons, in order to determine the most appropriate time for gas sampling in the Brazilian Southeast region. It aimed also to verify correlations between CH4 flux and air, water and soil temperatures, and solar radiation. The CH4 emissions were measured every 3-hour interval on specific days in different development stages of the flooded rice in the Experiment Station of the Agência Paulista de Tecnologia dos Agronegócios (APTA), Pólo Regional Vale do Paraíba, at Pindamonhangaba, State of São Paulo (22°55’ S, 45°30’ W), Brazil. Different CH4 emission rates were observed among the plant growth stages and also among the growing seasons. The CH4 emission showed high correlation with the soil temperature at 2cm depth. At this depth, the CH4 emission activation energy in response to soil temperature was higher in the stage R2. Emission peaks were observed at afternoon, while lower fluxes were recorded at the early morning. The most appropriate local time for gas sampling was estimated at 12:11:15a.m.±01:14:16 and 09:05:49p.m.±01:29:04.
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spelling Diurnal variation of methane emission from a paddy field in Brazilian Southeastflooded ricemethane fluxplant development stageactivation energyABSTRACT: This study aimed to investigate the diurnal variation of methane (CH4) emission in a flooded-irrigated rice field at different stages of the plant development under tropical climate in three growing seasons, in order to determine the most appropriate time for gas sampling in the Brazilian Southeast region. It aimed also to verify correlations between CH4 flux and air, water and soil temperatures, and solar radiation. The CH4 emissions were measured every 3-hour interval on specific days in different development stages of the flooded rice in the Experiment Station of the Agência Paulista de Tecnologia dos Agronegócios (APTA), Pólo Regional Vale do Paraíba, at Pindamonhangaba, State of São Paulo (22°55’ S, 45°30’ W), Brazil. Different CH4 emission rates were observed among the plant growth stages and also among the growing seasons. The CH4 emission showed high correlation with the soil temperature at 2cm depth. At this depth, the CH4 emission activation energy in response to soil temperature was higher in the stage R2. Emission peaks were observed at afternoon, while lower fluxes were recorded at the early morning. The most appropriate local time for gas sampling was estimated at 12:11:15a.m.±01:14:16 and 09:05:49p.m.±01:29:04.Universidade Federal de Santa Maria2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400251Ciência Rural v.48 n.4 2018reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20170054info:eu-repo/semantics/openAccessLima,Magda Aparecida dePazianotto,Ricardo Antonio AlmeidaVillela,Omar VieiraParaíba,Lourival Costaeng2018-04-13T00:00:00ZRevista
dc.title.none.fl_str_mv Diurnal variation of methane emission from a paddy field in Brazilian Southeast
title Diurnal variation of methane emission from a paddy field in Brazilian Southeast
spellingShingle Diurnal variation of methane emission from a paddy field in Brazilian Southeast
Lima,Magda Aparecida de
flooded rice
methane flux
plant development stage
activation energy
title_short Diurnal variation of methane emission from a paddy field in Brazilian Southeast
title_full Diurnal variation of methane emission from a paddy field in Brazilian Southeast
title_fullStr Diurnal variation of methane emission from a paddy field in Brazilian Southeast
title_full_unstemmed Diurnal variation of methane emission from a paddy field in Brazilian Southeast
title_sort Diurnal variation of methane emission from a paddy field in Brazilian Southeast
author Lima,Magda Aparecida de
author_facet Lima,Magda Aparecida de
Pazianotto,Ricardo Antonio Almeida
Villela,Omar Vieira
Paraíba,Lourival Costa
author_role author
author2 Pazianotto,Ricardo Antonio Almeida
Villela,Omar Vieira
Paraíba,Lourival Costa
author2_role author
author
author
dc.contributor.author.fl_str_mv Lima,Magda Aparecida de
Pazianotto,Ricardo Antonio Almeida
Villela,Omar Vieira
Paraíba,Lourival Costa
dc.subject.por.fl_str_mv flooded rice
methane flux
plant development stage
activation energy
topic flooded rice
methane flux
plant development stage
activation energy
description ABSTRACT: This study aimed to investigate the diurnal variation of methane (CH4) emission in a flooded-irrigated rice field at different stages of the plant development under tropical climate in three growing seasons, in order to determine the most appropriate time for gas sampling in the Brazilian Southeast region. It aimed also to verify correlations between CH4 flux and air, water and soil temperatures, and solar radiation. The CH4 emissions were measured every 3-hour interval on specific days in different development stages of the flooded rice in the Experiment Station of the Agência Paulista de Tecnologia dos Agronegócios (APTA), Pólo Regional Vale do Paraíba, at Pindamonhangaba, State of São Paulo (22°55’ S, 45°30’ W), Brazil. Different CH4 emission rates were observed among the plant growth stages and also among the growing seasons. The CH4 emission showed high correlation with the soil temperature at 2cm depth. At this depth, the CH4 emission activation energy in response to soil temperature was higher in the stage R2. Emission peaks were observed at afternoon, while lower fluxes were recorded at the early morning. The most appropriate local time for gas sampling was estimated at 12:11:15a.m.±01:14:16 and 09:05:49p.m.±01:29:04.
publishDate 2018
dc.date.none.fl_str_mv 2018-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400251
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400251
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0103-8478cr20170054
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Rural v.48 n.4 2018
reponame:Ciência Rural
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Rural
collection Ciência Rural
repository.name.fl_str_mv
repository.mail.fl_str_mv
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