A vital option for food security and greenhouse gases mitigation: planting elite super rice in double- to single-rice cropping fields in China

Fan, Dongli1; Fan, Yidan1,2; Tian, Zhan2; Li, Xiubin3; Jiang, Min4; Sun, Laixiang5,6; Zhong, Honglin5,7; Wang, Kai2; Wang, Xiangyi1; Jiang, Luguang3

2021-09-01

10.1088/1748-9326/ac1e3e

Environmental Research Letters   影响因子和分区

1748-9326

Double-rice cropping (DRC) in southern China has made outstanding contributions to ensuring food security, along with a large amount of greenhouse gas (GHG) emissions. The observed significant shift from double- to single-rice (DtS) cropping since 1990 in southern China has led to great concerns on food security, despite its contribution to GHG emissions reduction. How to ensure food security without compromising the goal of mitigating GHG emission requires innovative thinking and a comprehensive tradeoff analysis of all plausible options. This study adopts a multi-model coupling method to simulate the yield and GHG emissions trade-offs across grid-cells by incorporating the option of planting elite super rice in the DtS areas. The simulation results indicate that planting elite super rice with longer growth period in the DtS areas has the potential to compensate the annual yield loss caused by the DtS shift while significantly mitigating GHG emissions in comparison with the conventional DRC. In more detail, while the yield and GHG emissions of prevailing single-rice cropping are 48% (+/- 2%) and 54% (+/- 4%) lower than the corresponding (two-season sums) figures of conventional DRC under the current irrigation practice of midseason drainage, the yield and GHG emissions of super rice are 15% (+/- 4%) and 44% (+/- 6%) lower than the above reference figures if the emerging irrigation regime of alternate wetting and drying is adopted. Furthermore, our modeling simulations demonstrate the feasibility of promoting elite super rice cultivars across southern China. The research suggests a viable option for China to balance the trade-off between food security and GHG mitigation.

elite super rice GHG emissions food security coupled agricultural models China

SCI ; EI

英语

通讯

National Natural Science Foundation of China[42071253,41601049] ; High-level Special Funding of the Southern University of Science and Technology["G02296302","G02296402"]

Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences

Environmental Sciences ; Meteorology & Atmospheric Sciences

WOS:000692006900001

IOP PUBLISHING LTD

20213710896955

Economic and social effects ; Emission control ; Food supply ; Gas emissions ; Irrigation

Air Pollution Sources:451.1 ; Air Pollution Control:451.2 ; Agricultural Methods:821.3 ; Food Products:822.3 ; Social Sciences:971

Web of Science

1.Shanghai Inst Technol, Sch Chem & Environm Engn, Shanghai 201418, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
4.Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China
5.Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA
6.SOAS Univ London, Sch Finance & Management, London WC1H 0XG, England
7.Shandong Univ, Inst Blue & Green Dev, Weihai 264200, Peoples R China

Fan, Dongli,Fan, Yidan,Tian, Zhan,et al. A vital option for food security and greenhouse gases mitigation: planting elite super rice in double- to single-rice cropping fields in China[J]. Environmental Research Letters,2021,16(9).

Fan, Dongli.,Fan, Yidan.,Tian, Zhan.,Li, Xiubin.,Jiang, Min.,...&Jiang, Luguang.(2021).A vital option for food security and greenhouse gases mitigation: planting elite super rice in double- to single-rice cropping fields in China.Environmental Research Letters,16(9).

Fan, Dongli,et al."A vital option for food security and greenhouse gases mitigation: planting elite super rice in double- to single-rice cropping fields in China".Environmental Research Letters 16.9(2021).