Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000200012 |
Resumo: | Assessments of soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) emissions are critical for determination of the agricultural practices' potential to mitigate global warming. This study evaluated the photoacoustic spectroscopy (PAS) for the assessment of soil greenhouse gases (GHG) fluxes in comparison to the standard gas chromatography (GC) method. Two long-term experiments with different tillage and cropping systems over a Paleudult were evaluated using static chambers. PAS measurements of CO2 and N2O concentrations showed good relationship and linearity (R2=0.98 and 0.94, respectively) with GC results. However, CH4 measurements were significantly affected by air sample moisture which interfered on CH4 detection by PAS. Overestimation of CO2 and N2O concentrations in air samples determined by PAS (14.6 and 18.7%, respectively) were also related to sampling moisture. CO2 and N2O fluxes showed good agreement between methods (R2=0.96 and 0.95, respectively), though PAS overestimated fluxes by 18.6 and 13.6% in relation to GC results, respectively. PAS showed good sensitivity and was able to detect CO2 and N2O fluxes as low as 332mg CO2 m-2 h-1 and 21µg N2O m-2 h-1. PAS analyzer should be detailed calibrated to reduce humidity interference on CO2, CH4 and N2O concentrations measurements avoiding overestimation or erroneous determination of soil GHG fluxes. |
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Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissionsno-tillageconventional tillagecover cropsINNOVA 1412Assessments of soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) emissions are critical for determination of the agricultural practices' potential to mitigate global warming. This study evaluated the photoacoustic spectroscopy (PAS) for the assessment of soil greenhouse gases (GHG) fluxes in comparison to the standard gas chromatography (GC) method. Two long-term experiments with different tillage and cropping systems over a Paleudult were evaluated using static chambers. PAS measurements of CO2 and N2O concentrations showed good relationship and linearity (R2=0.98 and 0.94, respectively) with GC results. However, CH4 measurements were significantly affected by air sample moisture which interfered on CH4 detection by PAS. Overestimation of CO2 and N2O concentrations in air samples determined by PAS (14.6 and 18.7%, respectively) were also related to sampling moisture. CO2 and N2O fluxes showed good agreement between methods (R2=0.96 and 0.95, respectively), though PAS overestimated fluxes by 18.6 and 13.6% in relation to GC results, respectively. PAS showed good sensitivity and was able to detect CO2 and N2O fluxes as low as 332mg CO2 m-2 h-1 and 21µg N2O m-2 h-1. PAS analyzer should be detailed calibrated to reduce humidity interference on CO2, CH4 and N2O concentrations measurements avoiding overestimation or erroneous determination of soil GHG fluxes.Universidade Federal de Santa Maria2013-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000200012Ciência Rural v.43 n.2 2013reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/S0103-84782013000200012info:eu-repo/semantics/openAccessNicoloso,Rodrigo da SilveiraBayer,CimélioDenega,Genuir LuisOliveira,Paulo Armando Victória deHigarashi,Martha MayumiCorrêa,Juliano CorulliLopes,Letícia dos Santoseng2013-06-04T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions |
title |
Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions |
spellingShingle |
Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions Nicoloso,Rodrigo da Silveira no-tillage conventional tillage cover crops INNOVA 1412 |
title_short |
Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions |
title_full |
Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions |
title_fullStr |
Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions |
title_full_unstemmed |
Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions |
title_sort |
Gas chromatography and photoacoustic spectroscopy for the assessment of soil greenhouse gases emissions |
author |
Nicoloso,Rodrigo da Silveira |
author_facet |
Nicoloso,Rodrigo da Silveira Bayer,Cimélio Denega,Genuir Luis Oliveira,Paulo Armando Victória de Higarashi,Martha Mayumi Corrêa,Juliano Corulli Lopes,Letícia dos Santos |
author_role |
author |
author2 |
Bayer,Cimélio Denega,Genuir Luis Oliveira,Paulo Armando Victória de Higarashi,Martha Mayumi Corrêa,Juliano Corulli Lopes,Letícia dos Santos |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Nicoloso,Rodrigo da Silveira Bayer,Cimélio Denega,Genuir Luis Oliveira,Paulo Armando Victória de Higarashi,Martha Mayumi Corrêa,Juliano Corulli Lopes,Letícia dos Santos |
dc.subject.por.fl_str_mv |
no-tillage conventional tillage cover crops INNOVA 1412 |
topic |
no-tillage conventional tillage cover crops INNOVA 1412 |
description |
Assessments of soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) emissions are critical for determination of the agricultural practices' potential to mitigate global warming. This study evaluated the photoacoustic spectroscopy (PAS) for the assessment of soil greenhouse gases (GHG) fluxes in comparison to the standard gas chromatography (GC) method. Two long-term experiments with different tillage and cropping systems over a Paleudult were evaluated using static chambers. PAS measurements of CO2 and N2O concentrations showed good relationship and linearity (R2=0.98 and 0.94, respectively) with GC results. However, CH4 measurements were significantly affected by air sample moisture which interfered on CH4 detection by PAS. Overestimation of CO2 and N2O concentrations in air samples determined by PAS (14.6 and 18.7%, respectively) were also related to sampling moisture. CO2 and N2O fluxes showed good agreement between methods (R2=0.96 and 0.95, respectively), though PAS overestimated fluxes by 18.6 and 13.6% in relation to GC results, respectively. PAS showed good sensitivity and was able to detect CO2 and N2O fluxes as low as 332mg CO2 m-2 h-1 and 21µg N2O m-2 h-1. PAS analyzer should be detailed calibrated to reduce humidity interference on CO2, CH4 and N2O concentrations measurements avoiding overestimation or erroneous determination of soil GHG fluxes. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-02-01 |
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=S0103-84782013000200012 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000200012 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-84782013000200012 |
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.43 n.2 2013 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 |
|
_version_ |
1749140542385553408 |