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Impact assessment of climate change, carbon dioxide fertilization and constant growing season on rice yields in China

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  • Yongqiang Yu
  • Wen Zhang
  • Yao Huang

Abstract

Rice is the staple food in China, and the country’s enlarging population puts increasing pressure on its rice production as well as on that of the world. In this study, we estimate the impact of climate change, CO 2 fertilization, crop adaptation and the interactions of these three factors on the rice yields of China using model simulation with four hypothetical scenarios. According to the results of the model simulation, the rice yields without CO 2 fertilization are predicted to decrease by 3.3 % in the 2040s. Considering a constant rice-growing season (GS), the rice yields are predicted to increase by 3.2 %. When the effect of CO 2 fertilization is integrated into the Agro-C model, the expected rice yields increase by 20.9 %. When constant GS and CO 2 fertilization are both integrated into the model, the predicted rice yield increases by 28.6 %. In summary, the rice yields in China are predicted to decrease in the 2040s by 0.22 t/ha due to climate change, to increase by 0.44 t/ha due to a constant GS and to increase by 1.65 t/ha due to CO 2 fertilization. The benefits of crop adaptation would completely offset the negative impact of climate change. In the future, the most of the positive effects of climate change are expected to occur in northeastern and northwestern China, and the expansion of rice cultivation in northeastern China should further enhance the stability of rice production in China. Copyright Springer Science+Business Media Dordrecht 2014

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  • Yongqiang Yu & Wen Zhang & Yao Huang, 2014. "Impact assessment of climate change, carbon dioxide fertilization and constant growing season on rice yields in China," Climatic Change, Springer, vol. 124(4), pages 763-775, June.
    • Handle: RePEc:spr:climat:v:124:y:2014:i:4:p:763-775
    DOI: 10.1007/s10584-014-1129-9
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    1. Dianyuan Ding & Hao Feng & Ying Zhao & Wenzhao Liu & Haixin Chen & Jianqiang He, 2016. "Impact assessment of climate change and later-maturing cultivars on winter wheat growth and soil water deficit on the Loess Plateau of China," Climatic Change, Springer, vol. 138(1), pages 157-171, September.

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