气候变化领域集成服务门户(CCPortal): Global irrigation contribution to wheat and maize yield

CCPortal

DOI	10.1038/s41467-021-21498-5
	Global irrigation contribution to wheat and maize yield
	Wang, Xuhui; Mueller, Christoph; Elliot, Joshua; Mueller, Nathaniel D.; Ciais, Philippe; Jaegermeyr, Jonas; Gerber, James; Dumas, Patrice; Wang, Chenzhi; Yang, Hui; Li, Laurent; Deryng, Delphine; Folberth, Christian; Liu, Wenfeng; Makowski, David; Olin, Stefan; Pugh, Thomas A. M.; Reddy, Ashwan; Schmid, Erwin; Jeong, Sujong; Zhou, Feng; Piao, Shilong
通讯作者	Wang, XH (通讯作者)
发表日期	2021
EISSN	2041-1723
卷号	12 期号:1
英文摘要	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 (Delta Y). At global scale, Delta Y is 349% 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. There are big uncertainties in the contribution of irrigation to crop yields. Here, the authors use Bayesian model averaging to combine statistical and process-based models and quantify the contribution of irrigation for wheat and maize yields, finding that irrigation alone cannot close yield gaps for a large fraction of global rainfed agriculture.
关键词	CROP MODELS LAND-USE WATER EXPANSION IMPACTS DEMAND
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000623781900009
来源期刊	NATURE COMMUNICATIONS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260550
推荐引用方式 GB/T 7714	Wang, Xuhui,Mueller, Christoph,Elliot, Joshua,et al. Global irrigation contribution to wheat and maize yield[J]. 中国科学院青藏高原研究所,2021,12(1).
APA	Wang, Xuhui.,Mueller, Christoph.,Elliot, Joshua.,Mueller, Nathaniel D..,Ciais, Philippe.,...&Piao, Shilong.(2021).Global irrigation contribution to wheat and maize yield.NATURE COMMUNICATIONS,12(1).
MLA	Wang, Xuhui,et al."Global irrigation contribution to wheat and maize yield".NATURE COMMUNICATIONS 12.1(2021).