Neglecting the fallow season can significantly underestimate annual methane emissions in Mediterranean rice fields
Paddy rice fields are one of the most important sources of anthropogenic methane. Improving the accuracy in the CH4 budget is fundamental to identify strategies to mitigate climate change. Such improvement requires a mechanistic understanding of the complex interactions between environmental and agr...
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| creator | Martínez-Eixarch, Maite Alcaraz, Carles Viñas, Marc Noguerol, Joan Aranda, Xavier Prenafeta-Boldú, Francesc Xavier Saldaña-De la Vega, Jesús Antonio Català, Maria Del Mar Ibáñez, Carles |
| description | Paddy rice fields are one of the most important sources of anthropogenic methane. Improving the accuracy in the CH4 budget is fundamental to identify strategies to mitigate climate change. Such improvement requires a mechanistic understanding of the complex interactions between environmental and agronomic factors determining CH4 emissions, and also the characterization of the annual temporal CH4 emissions pattern in the whole crop cycle. Hence, both the growing and fallow seasons must be included. However, most of the previous research has been based on single-factor analyses that are focused on the growing season. In order to fill this gap, a study was conducted in a Mediterranean rice agrosystem (Ebre Delta, Catalonia) following a farm-to-farm approach with the purpose of 1) evaluating the cumulative and temporal pattern of CH4 emission, and 2) conducting a multi-variate analyses to assess the associative pattern, relative contribution and temporal variation of the main explanatory variables concerning the observed CH4 emissions. Measurements of CH4 emissions and agronomic and environmental parameters in 15 commercial rice fields were monitored monthly, during a whole crop field cycle. The temporal pattern of CH4 emission followed a bi-modal distribution peaking in August and October. The cumulative annual CH4 emissions from rice fields amounted 314 kg CH4 kg ha-1, of which ca. 70% were emitted during the fallow season. The main controlling factors of the CH4 emission rate in the growing season were positive related to water level and plant cover, while soil redox was negatively related. The main controlling factors in the fallow season were water level (negatively related, conversely to the growing season), as well as straw incorporation and soil temperature (positively related). The results of this study highlight the importance of the often neglected fallow season in the accurate estimation of CH4 emissions and, thus, the necessity of measurement programs that cover the whole crop field cycle. This information is the first step for setting effective mitigation strategies based on straw and water management. |
| doi_str_mv | 10.1371/journal.pone.0198081 |
| format | Article |
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Improving the accuracy in the CH4 budget is fundamental to identify strategies to mitigate climate change. Such improvement requires a mechanistic understanding of the complex interactions between environmental and agronomic factors determining CH4 emissions, and also the characterization of the annual temporal CH4 emissions pattern in the whole crop cycle. Hence, both the growing and fallow seasons must be included. However, most of the previous research has been based on single-factor analyses that are focused on the growing season. In order to fill this gap, a study was conducted in a Mediterranean rice agrosystem (Ebre Delta, Catalonia) following a farm-to-farm approach with the purpose of 1) evaluating the cumulative and temporal pattern of CH4 emission, and 2) conducting a multi-variate analyses to assess the associative pattern, relative contribution and temporal variation of the main explanatory variables concerning the observed CH4 emissions. Measurements of CH4 emissions and agronomic and environmental parameters in 15 commercial rice fields were monitored monthly, during a whole crop field cycle. The temporal pattern of CH4 emission followed a bi-modal distribution peaking in August and October. The cumulative annual CH4 emissions from rice fields amounted 314 kg CH4 kg ha-1, of which ca. 70% were emitted during the fallow season. The main controlling factors of the CH4 emission rate in the growing season were positive related to water level and plant cover, while soil redox was negatively related. The main controlling factors in the fallow season were water level (negatively related, conversely to the growing season), as well as straw incorporation and soil temperature (positively related). The results of this study highlight the importance of the often neglected fallow season in the accurate estimation of CH4 emissions and, thus, the necessity of measurement programs that cover the whole crop field cycle. This information is the first step for setting effective mitigation strategies based on straw and water management.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0198081</identifier><identifier>PMID: 29852016</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Agronomy ; Anthropogenic factors ; Aquatic ecosystems ; Biology ; Biology and Life Sciences ; Climate change ; Climate change mitigation ; Crop fields ; Crops ; Earth Sciences ; Ecology and Environmental Sciences ; Ecosystem biology ; Emergency preparedness ; Emission analysis ; Emission measurements ; Emissions ; Environmental parameters ; Farms ; Greenhouse gases ; Growing season ; Influence ; Manures ; Methane ; Methane emissions ; Mitigation ; Oryza ; Physical Sciences ; Research and Analysis Methods ; Rice ; Rice fields ; Seasons ; Soil fertility ; Soil temperature ; Straw ; Studies ; Temporal variations ; Water levels ; Water management</subject><ispartof>PloS one, 2018-05, Vol.13 (5), p.e0198081-e0198081</ispartof><rights>COPYRIGHT 2018 Public Library of Science</rights><rights>2018 Martínez-Eixarch et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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Improving the accuracy in the CH4 budget is fundamental to identify strategies to mitigate climate change. Such improvement requires a mechanistic understanding of the complex interactions between environmental and agronomic factors determining CH4 emissions, and also the characterization of the annual temporal CH4 emissions pattern in the whole crop cycle. Hence, both the growing and fallow seasons must be included. However, most of the previous research has been based on single-factor analyses that are focused on the growing season. In order to fill this gap, a study was conducted in a Mediterranean rice agrosystem (Ebre Delta, Catalonia) following a farm-to-farm approach with the purpose of 1) evaluating the cumulative and temporal pattern of CH4 emission, and 2) conducting a multi-variate analyses to assess the associative pattern, relative contribution and temporal variation of the main explanatory variables concerning the observed CH4 emissions. Measurements of CH4 emissions and agronomic and environmental parameters in 15 commercial rice fields were monitored monthly, during a whole crop field cycle. The temporal pattern of CH4 emission followed a bi-modal distribution peaking in August and October. The cumulative annual CH4 emissions from rice fields amounted 314 kg CH4 kg ha-1, of which ca. 70% were emitted during the fallow season. The main controlling factors of the CH4 emission rate in the growing season were positive related to water level and plant cover, while soil redox was negatively related. The main controlling factors in the fallow season were water level (negatively related, conversely to the growing season), as well as straw incorporation and soil temperature (positively related). The results of this study highlight the importance of the often neglected fallow season in the accurate estimation of CH4 emissions and, thus, the necessity of measurement programs that cover the whole crop field cycle. 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Carles</au><au>Viñas, Marc</au><au>Noguerol, Joan</au><au>Aranda, Xavier</au><au>Prenafeta-Boldú, Francesc Xavier</au><au>Saldaña-De la Vega, Jesús Antonio</au><au>Català, Maria Del Mar</au><au>Ibáñez, Carles</au><au>Paz-Ferreiro, Jorge</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Neglecting the fallow season can significantly underestimate annual methane emissions in Mediterranean rice fields</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2018-05-31</date><risdate>2018</risdate><volume>13</volume><issue>5</issue><spage>e0198081</spage><epage>e0198081</epage><pages>e0198081-e0198081</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>Paddy rice fields are one of the most important sources of anthropogenic methane. Improving the accuracy in the CH4 budget is fundamental to identify strategies to mitigate climate change. Such improvement requires a mechanistic understanding of the complex interactions between environmental and agronomic factors determining CH4 emissions, and also the characterization of the annual temporal CH4 emissions pattern in the whole crop cycle. Hence, both the growing and fallow seasons must be included. However, most of the previous research has been based on single-factor analyses that are focused on the growing season. In order to fill this gap, a study was conducted in a Mediterranean rice agrosystem (Ebre Delta, Catalonia) following a farm-to-farm approach with the purpose of 1) evaluating the cumulative and temporal pattern of CH4 emission, and 2) conducting a multi-variate analyses to assess the associative pattern, relative contribution and temporal variation of the main explanatory variables concerning the observed CH4 emissions. Measurements of CH4 emissions and agronomic and environmental parameters in 15 commercial rice fields were monitored monthly, during a whole crop field cycle. The temporal pattern of CH4 emission followed a bi-modal distribution peaking in August and October. The cumulative annual CH4 emissions from rice fields amounted 314 kg CH4 kg ha-1, of which ca. 70% were emitted during the fallow season. The main controlling factors of the CH4 emission rate in the growing season were positive related to water level and plant cover, while soil redox was negatively related. The main controlling factors in the fallow season were water level (negatively related, conversely to the growing season), as well as straw incorporation and soil temperature (positively related). The results of this study highlight the importance of the often neglected fallow season in the accurate estimation of CH4 emissions and, thus, the necessity of measurement programs that cover the whole crop field cycle. This information is the first step for setting effective mitigation strategies based on straw and water management.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>29852016</pmid><doi>10.1371/journal.pone.0198081</doi><tpages>e0198081</tpages><orcidid>https://orcid.org/0000-0002-7352-8522</orcidid><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 1932-6203 |
| ispartof | PloS one, 2018-05, Vol.13 (5), p.e0198081-e0198081 |
| issn | 1932-6203 1932-6203 |
| language | eng |
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| source | DOAJ Directory of Open Access Journals; Public Library of Science (PLoS) Journals Open Access; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Agronomy Anthropogenic factors Aquatic ecosystems Biology Biology and Life Sciences Climate change Climate change mitigation Crop fields Crops Earth Sciences Ecology and Environmental Sciences Ecosystem biology Emergency preparedness Emission analysis Emission measurements Emissions Environmental parameters Farms Greenhouse gases Growing season Influence Manures Methane Methane emissions Mitigation Oryza Physical Sciences Research and Analysis Methods Rice Rice fields Seasons Soil fertility Soil temperature Straw Studies Temporal variations Water levels Water management |
| title | Neglecting the fallow season can significantly underestimate annual methane emissions in Mediterranean rice fields |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-24T04%3A04%3A49IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-gale_plos_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Neglecting%20the%20fallow%20season%20can%20significantly%20underestimate%20annual%20methane%20emissions%20in%20Mediterranean%20rice%20fields&rft.jtitle=PloS%20one&rft.au=Mart%C3%ADnez-Eixarch,%20Maite&rft.date=2018-05-31&rft.volume=13&rft.issue=5&rft.spage=e0198081&rft.epage=e0198081&rft.pages=e0198081-e0198081&rft.issn=1932-6203&rft.eissn=1932-6203&rft_id=info:doi/10.1371/journal.pone.0198081&rft_dat=%3Cgale_plos_%3EA540977567%3C/gale_plos_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2047870319&rft_id=info:pmid/29852016&rft_galeid=A540977567&rft_doaj_id=oai_doaj_org_article_3a4ea38f5e8f48da823c19f5fb42e3a1&rfr_iscdi=true |