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Global warming and shifts in cropping systems together reduce China's rice production

Global warming and shifts in cropping systems together reduce China's rice production

Chen, Changqing, van Groenigen, Kees Jan, Yang, Huiyi, Hungate, Bruce A., Yang, Bing, Tian, Yunlu, Chen, Jin, Dong, Wenjun, Huang, Shan, Deng, Aixing, Jiang, Yu and Zhang, Weijian (2020) Global warming and shifts in cropping systems together reduce China's rice production. Global Food Security, 24:100359. ISSN 2211-9124 (Print), 2211-9124 (Online) (doi:https://doi.org/10.1016/j.gfs.2020.100359)

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Abstract

Climate warming is widely expected to affect rice yields, but results are equivocal and variation in rice cropping systems and climatic conditions complicates country-scale yield assessments. Here we show, through meta–a- nalysis of field warming experiments, that yield responses to warming differ strongly between China's rice cropping systems. Whereas warming increases yields in “single rice” systems, it decreases yields in “middle rice” systems and has contrasting effects for early and late rice in “double rice” systems. We further show that the contribution of these cropping systems to China's total rice production has shifted dramatically over recent decades. We estimate that if the present structure of rice cropping systems persists, warming will reduce China's total rice production by 5.0% in 2060. However, if the recent decline in the area of double rice systems con- tinues, China's rice production may decrease by 13.5%. Our results underline the need for maintaining the current area of China's “double rice” cropping system and for technological innovations in multiple rice cropping systems to ensure food security in a warming climate.

Item Type: Article
Uncontrolled Keywords: food security; warming; climate change; meta-analysis; cropping system
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
S Agriculture > S Agriculture (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Livelihoods & Institutions Department
Last Modified: 19 Jul 2020 23:30
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None
URI: http://gala.gre.ac.uk/id/eprint/28847

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