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  Global irrigation contribution to wheat and maize yield

Wang, X., Müller, C., Elliott, J., Mueller, N., Ciais, P., Jägermeyr, J., Gerber, J., Dumas, P., Wang, C., Yang, H., Li, L., Deryng, D., Folberth, C., Liu, W., Makowski, D., Olin, S., Pugh, T. A. M., Reddy, A., Schmid, E., Jeong, S., Zhou, F., Piao, S. (2021): Global irrigation contribution to wheat and maize yield. - Nature Communications, 12, 1235.
https://doi.org/10.1038/s41467-021-21498-5

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Item Permalink: https://publications.pik-potsdam.de/pubman/item/item_25366 Version Permalink: https://publications.pik-potsdam.de/pubman/item/item_25366_6
Genre: Journal Article

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 Creators:
Wang, Xuhui1, Author
Müller, Christoph2, Author              
Elliott, Joshua1, Author
Mueller, Nathaniel1, Author
Ciais, Philippe1, Author
Jägermeyr, Jonas1, Author
Gerber, James1, Author
Dumas, Patrice1, Author
Wang, Chenzhi1, Author
Yang, Hui1, Author
Li, Laurent1, Author
Deryng, Delphine1, Author
Folberth, Christian1, Author
Liu, Wenfeng1, Author
Makowski, David1, Author
Olin, Stefan1, Author
Pugh, Thomas A. M.1, Author
Reddy, Ashwan1, Author
Schmid, Erwin1, Author
Jeong, Sujong1, Author
Zhou, Feng1, AuthorPiao, Shilong1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, ou_persistent13              

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 Abstract: Irrigation is the largest sector of human water use and an important option for increasing crop production and reducing drought impacts. However, the potential for irrigation to contribute to global crop yields remains uncertain. Here, we quantify this contribution for wheat and maize at global scale by developing a Bayesian framework integrating empirical estimates and gridded global crop models on new maps of the relative difference between attainable rainfed and irrigated yield (ΔY). At global scale, ΔY is 34 ± 9% for wheat and 22 ± 13% for maize, with large spatial differences driven more by patterns of precipitation than that of evaporative demand. Comparing irrigation demands with renewable water supply, we find 30–47% of contemporary rainfed agriculture of wheat and maize cannot achieve yield gap closure utilizing current river discharge, unless more water diversion projects are set in place, putting into question the potential of irrigation to mitigate climate change impacts.

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 Dates: 2021-01-262021-02-23
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: MDB-ID: yes - 3090
PIKDOMAIN: RD2 - Climate Resilience
Organisational keyword: RD2 - Climate Resilience
Research topic keyword: Food & Agriculture
Research topic keyword: Freshwater
Research topic keyword: Land use
Regional keyword: Global
Model / method: LPJmL
DOI: 10.1038/s41467-021-21498-5
 Degree: -

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Title: Nature Communications
Source Genre: Journal, SCI, Scopus, p3, oa
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Pages: - Volume / Issue: 12 Sequence Number: 1235 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals354
Publisher: Springer Nature