Global irrigation contribution to wheat and maize yield - Sorbonne Université Access content directly
Journal Articles Nature Communications Year : 2021

Global irrigation contribution to wheat and maize yield

Xuhui Wang
  • Function : Author
  • PersonId : 996159
James Gerber
  • Function : Author
Chenzhi Wang
Laurent Li
Delphine Deryng
David Makowski
Stefan Olin
Erwin Schmid
  • Function : Author
Sujong Jeong
Feng Zhou


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.
Fichier principal
Vignette du fichier
s41467-021-21498-5.pdf (25.21 Mo) Télécharger le fichier
Origin : Publication funded by an institution

Dates and versions

hal-03152427 , version 1 (25-02-2021)





Xuhui Wang, Christoph Müller, Joshua Elliot, Nathaniel D Mueller, Philippe Ciais, et al.. Global irrigation contribution to wheat and maize yield. Nature Communications, 2021, 12 (1), pp.1235. ⟨10.1038/s41467-021-21498-5⟩. ⟨hal-03152427⟩
823 View
43 Download



Gmail Facebook X LinkedIn More