Seasonal Changes in Methane Emissions via Different Pathways from a Rice Paddy Field

Seasonal Changes in Methane Emissions via Different Pathways from a Rice Paddy Field | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Seasonal Changes in Methane Emissions via Different Pathways from a Rice Paddy Field Shoichiro Hamamoto, Tatsuya Kobayakawa, Dingwen Cui, Xuping Ma, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4701849/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Rice paddies are significant sources of methane (CH 4 ) emissions, with CH 4 released into the atmosphere through three pathways: molecular diffusion of dissolved methane across the atmosphere-water boundary, ebullition of gas bubbles, and diffusive transport through the aerenchyma tissue of rice plants. This study aimed to analyze seasonal variations of CH 4 fluxes separately via ebullition and rice plants, and to explore the potential relationship between in-situ gas volume and CH 4 emissions. Field monitoring of CH 4 emissions, gas-filled porosity (i.e., bubble volume), and soil temperature was conducted in a rice paddy with four different treatments: plots with/without rice plant ( Oryza sativa , cv Koshihikari) and with/without straw application. Results indicated that both total CH 4 flux and CH 4 ebullition were higher during the ripening stage for plots without straw application, where over 60% of total CH 4 flux was attributed to ebullition. Rice straw application enhanced both fluxes during the early vegetative stage. Seasonal trends of total CH 4 flux corresponded to those of CH 4 flux via ebullition. Gas-filled porosity increased during the vegetative stage particularly in plots with straw application, reaching almost maximum values during the late reproductive stage. Methane flux via rice plant and ebullition were correlated well with gas-filled porosity during the vegetative and reproductive stages. This study suggests that the size of gaseous CH 4 pool is a good measure for estimating flux intensities of both ebullition and rice-mediated pathways. paddy field methane ebullition gaseous methane pool Full Text Additional Declarations The authors declare no competing interests. Supplementary Files SupplementaryFile040524.pdf Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4701849","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":323848228,"identity":"76881be7-efe7-49f5-8920-e2a3006ece2b","order_by":0,"name":"Shoichiro 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(CH\u003csub\u003e4\u003c/sub\u003e) emissions, with CH\u003csub\u003e4\u003c/sub\u003e released into the atmosphere through three pathways: molecular diffusion of dissolved methane across the atmosphere-water boundary, ebullition of gas bubbles, and diffusive transport through the aerenchyma tissue of rice plants. This study aimed to analyze seasonal variations of CH\u003csub\u003e4\u003c/sub\u003e fluxes separately via ebullition and rice plants, and to explore the potential relationship between in-situ gas volume and CH\u003csub\u003e4\u003c/sub\u003e emissions. Field monitoring of CH\u003csub\u003e4\u003c/sub\u003e emissions, gas-filled porosity (i.e., bubble volume), and soil temperature was conducted in a rice paddy with four different treatments: plots with/without rice plant (\u003cem\u003eOryza sativa\u003c/em\u003e, cv Koshihikari) and with/without straw application. Results indicated that both total CH\u003csub\u003e4\u003c/sub\u003e flux and CH\u003csub\u003e4\u003c/sub\u003e ebullition were higher during the ripening stage for plots without straw application, where over 60% of total CH\u003csub\u003e4\u003c/sub\u003e flux was attributed to ebullition. Rice straw application enhanced both fluxes during the early vegetative stage. 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This study suggests that the size of gaseous CH\u003csub\u003e4\u003c/sub\u003e pool is a good measure for estimating flux intensities of both ebullition and rice-mediated pathways.\u003c/p\u003e","manuscriptTitle":"Seasonal Changes in Methane Emissions via Different Pathways from a Rice Paddy Field","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-07-10 03:20:53","doi":"10.21203/rs.3.rs-4701849/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"4cb2e83f-1f38-4186-8358-4f032c84ce4a","owner":[],"postedDate":"July 10th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-07-10T03:20:53+00:00","versionOfRecord":[],"versionCreatedAt":"2024-07-10 03:20:53","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4701849","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4701849","identity":"rs-4701849","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}