Methane flux measurements in rice by static flux chamber and eddy covariance
Abstract Understanding methane (CH4) fluxes from rice (Oryza sativa L.) at the field scale is paramount to reducing environmental impacts while ensuring global food security. Greenhouse gas (GHG) measurements at the plot scale using static flux chambers (SFC) have long informed the understanding of...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Agrosystems, Geosciences & Environment |
| Online Access: | https://doi.org/10.1002/agg2.20119 |
| _version_ | 1818953669636259840 |
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| author | Michele L. Reba Bryant N. Fong Ishara Rijal M. Arlene Adviento‐Borbe Yin‐Lin Chiu Joseph H. Massey |
| author_facet | Michele L. Reba Bryant N. Fong Ishara Rijal M. Arlene Adviento‐Borbe Yin‐Lin Chiu Joseph H. Massey |
| author_sort | Michele L. Reba |
| collection | DOAJ |
| description | Abstract Understanding methane (CH4) fluxes from rice (Oryza sativa L.) at the field scale is paramount to reducing environmental impacts while ensuring global food security. Greenhouse gas (GHG) measurements at the plot scale using static flux chambers (SFC) have long informed the understanding of flux dynamics and have largely been the basis of global flux estimates. However, in many parts of the world, the landscapes where agricultural fluxes are generated come from larger fields. Eddy covariance (EC) can measure trace gases on larger fields, but there are few studies available quantifying CH4 emissions under typical practices at a field scale. Furthermore, few of these studies are from the U.S. Midsouth, the largest producer of U.S. rice. This study compares and quantifies field‐scale SFC and EC flux measurements on a large commercial system in northeastern Arkansas during the 2015 and 2016 growing seasons, following typical producer practices. Daily measured SFC CH4 fluxes did not differ from EC‐daily CH4 fluxes (p = .108). Total season CH4 emissions, calculated as the sum of daily fluxes ranged from 50 to 156 kg CH4 ha−1 season−1, with SFC reporting greater emissions than EC. Although SFC and EC‐daily flux measurements were similar early (p = .382) and late (p = .543) in the season, they differed mid‐season (p < .001) with SFC consistently reporting greater fluxes than EC. The findings of this study help unify season long plot‐scale and field‐scale flux measurements and signify an advancement of our understanding of GHG fluxes from rice systems. |
| first_indexed | 2024-12-20T10:09:57Z |
| format | Article |
| id | doaj.art-3005fe507a0242e48292284bb55f9aaa |
| institution | Directory Open Access Journal |
| issn | 2639-6696 |
| language | English |
| last_indexed | 2024-12-20T10:09:57Z |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Agrosystems, Geosciences & Environment |
| spelling | doaj.art-3005fe507a0242e48292284bb55f9aaa2022-12-21T19:44:11ZengWileyAgrosystems, Geosciences & Environment2639-66962020-01-0131n/an/a10.1002/agg2.20119Methane flux measurements in rice by static flux chamber and eddy covarianceMichele L. Reba0Bryant N. Fong1Ishara Rijal2M. Arlene Adviento‐Borbe3Yin‐Lin Chiu4Joseph H. Massey5USDA‐ARS‐Delta Water Management Research Unit 504 University Loop East Jonesboro AR 72401 USAUSDA‐ARS‐Delta Water Management Research Unit 504 University Loop East Jonesboro AR 72401 USAArkansas Biosciences Institute Arkansas State Univ., State University P.O. Box 639, 72467 AR USAUSDA‐ARS‐Delta Water Management Research Unit 504 University Loop East Jonesboro AR 72401 USAUSDA‐ARS‐Delta Water Management Research Unit 504 University Loop East Jonesboro AR 72401 USAUSDA‐ARS‐Delta Water Management Research Unit 504 University Loop East Jonesboro AR 72401 USAAbstract Understanding methane (CH4) fluxes from rice (Oryza sativa L.) at the field scale is paramount to reducing environmental impacts while ensuring global food security. Greenhouse gas (GHG) measurements at the plot scale using static flux chambers (SFC) have long informed the understanding of flux dynamics and have largely been the basis of global flux estimates. However, in many parts of the world, the landscapes where agricultural fluxes are generated come from larger fields. Eddy covariance (EC) can measure trace gases on larger fields, but there are few studies available quantifying CH4 emissions under typical practices at a field scale. Furthermore, few of these studies are from the U.S. Midsouth, the largest producer of U.S. rice. This study compares and quantifies field‐scale SFC and EC flux measurements on a large commercial system in northeastern Arkansas during the 2015 and 2016 growing seasons, following typical producer practices. Daily measured SFC CH4 fluxes did not differ from EC‐daily CH4 fluxes (p = .108). Total season CH4 emissions, calculated as the sum of daily fluxes ranged from 50 to 156 kg CH4 ha−1 season−1, with SFC reporting greater emissions than EC. Although SFC and EC‐daily flux measurements were similar early (p = .382) and late (p = .543) in the season, they differed mid‐season (p < .001) with SFC consistently reporting greater fluxes than EC. The findings of this study help unify season long plot‐scale and field‐scale flux measurements and signify an advancement of our understanding of GHG fluxes from rice systems.https://doi.org/10.1002/agg2.20119 |
| spellingShingle | Michele L. Reba Bryant N. Fong Ishara Rijal M. Arlene Adviento‐Borbe Yin‐Lin Chiu Joseph H. Massey Methane flux measurements in rice by static flux chamber and eddy covariance Agrosystems, Geosciences & Environment |
| title | Methane flux measurements in rice by static flux chamber and eddy covariance |
| title_full | Methane flux measurements in rice by static flux chamber and eddy covariance |
| title_fullStr | Methane flux measurements in rice by static flux chamber and eddy covariance |
| title_full_unstemmed | Methane flux measurements in rice by static flux chamber and eddy covariance |
| title_short | Methane flux measurements in rice by static flux chamber and eddy covariance |
| title_sort | methane flux measurements in rice by static flux chamber and eddy covariance |
| url | https://doi.org/10.1002/agg2.20119 |
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