Publication Abstracts

Wang et al. 2021

Wang, X., C. Müller, J. Elliot, N.D. Mueller, P. Ciais, J. Jägermeyr, J. Gerber, P. Dumas, C. Wang, H. Yang, L. Li, D. Deryng, C. Folberth, W. Liu, D. Makowski, S. Olin, T.A.M. Pugh, A. Reddy, E. Schmid, S. Jeong, F. Zhou, and S. Piao, 2021: Global irrigation contribution to wheat and maize yield. Nat. Comm., 12, no. 1, 1235, doi:10.1038/s41467-021-21498-5.

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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BibTeX Citation

@article{wa05800h,
  author={Wang, X. and Müller, C. and Elliot, J. and Mueller, N. D. and Ciais, P. and Jägermeyr, J. and Gerber, J. and Dumas, P. and Wang, C. and Yang, H. and Li, L. and Deryng, D. and Folberth, C. and Liu, W. and Makowski, D. and Olin, S. and Pugh, T. A. M. and Reddy, A. and Schmid, E. and Jeong, S. and Zhou, F. and Piao, S.},
  title={Global irrigation contribution to wheat and maize yield},
  year={2021},
  journal={Nat. Comm.},
  volume={12},
  number={1},
  pages={1235},
  doi={10.1038/s41467-021-21498-5},
}

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RIS Citation

TY  - JOUR
ID  - wa05800h
AU  - Wang, X.
AU  - Müller, C.
AU  - Elliot, J.
AU  - Mueller, N. D.
AU  - Ciais, P.
AU  - Jägermeyr, J.
AU  - Gerber, J.
AU  - Dumas, P.
AU  - Wang, C.
AU  - Yang, H.
AU  - Li, L.
AU  - Deryng, D.
AU  - Folberth, C.
AU  - Liu, W.
AU  - Makowski, D.
AU  - Olin, S.
AU  - Pugh, T. A. M.
AU  - Reddy, A.
AU  - Schmid, E.
AU  - Jeong, S.
AU  - Zhou, F.
AU  - Piao, S.
PY  - 2021
TI  - Global irrigation contribution to wheat and maize yield
JA  - Nat. Comm.
VL  - 12
IS  - 1
SP  - 1235
DO  - 10.1038/s41467-021-21498-5
ER  -

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