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  Global benefits of non-continuous flooding to reduce greenhouse gases and irrigation water use without rice yield penalty

Bo, Y., Jägermeyr, J., Yin, Z., Jiang, Y., Xu, J., Liang, H., Zhou, F. (2022): Global benefits of non-continuous flooding to reduce greenhouse gases and irrigation water use without rice yield penalty. - Global Change Biology, 28, 11, 3636-3650.
https://doi.org/10.1111/gcb.16132

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Global Change Biology - 2022 - Bo - Global benefits of non‐continuous flooding to reduce greenhouse gases and irrigation.pdf (Publisher version), 3MB
 
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 Creators:
Bo, Yan1, Author
Jägermeyr, Jonas2, Author              
Yin, Zun1, Author
Jiang, Yu1, Author
Xu, Junzeng1, Author
Liang, Hao1, Author
Zhou, Feng1, Author
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1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, Potsdam, ou_persistent13              

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 Abstract: Non-continuous flooding is an effective practice for reducing greenhouse gas (GHG) emissions and irrigation water use (IRR) in rice fields. However, advancing global implementation is hampered by the lack of comprehensive understanding of GHGs and IRR reduction benefits without compromising rice yield. Here, we present the largest observational data set for such effects as of yet. By using Random Forest regression models based on 636 field trials at 105 globally georeferenced sites, we identified the key drivers of effects of non-continuous flooding practices and mapped maximum GHGs or IRR reduction benefits under optimal non-continuous flooding strategies. The results show that variation in effects of non-continuous flooding practices are primarily explained by the UnFlooded days Ratio (UFR, that is the ratio of the number of days without standing water in the field to total days of the growing period). Non-continuous flooding practices could be feasible to be adopted in 76% of global rice harvested areas. This would reduce the global warming potential (GWP) of CH4 and N2O combined from rice production by 47% or the total GWP by 7% and alleviate IRR by 25%, while maintaining yield levels. The identified UFR targets far exceed currently observed levels particularly in South and Southeast Asia, suggesting large opportunities for climate mitigation and water use conservation, associated with the rigorous implementation of non-continuous flooding practices in global rice cultivation.

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 Dates: 2022-02-162022-02-162022-06
 Publication Status: Finally published
 Pages: 15
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1111/gcb.16132
MDB-ID: No data to archive
PIKDOMAIN: RD2 - Climate Resilience
Organisational keyword: RD2 - Climate Resilience
Working Group: Land Use and Resilience
Research topic keyword: Adaptation
Research topic keyword: Food & Agriculture
Research topic keyword: Freshwater
Research topic keyword: Mitigation
Research topic keyword: Sustainable Development
Regional keyword: Global
 Degree: -

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Title: Global Change Biology
Source Genre: Journal, SCI, Scopus, p3
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Pages: - Volume / Issue: 28 (11) Sequence Number: - Start / End Page: 3636 - 3650 Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals192
Publisher: Wiley