Geographic variation of rice yield response to past climate change in China

Yang J, Xiong W, Yang X-G, Cao Y, & Feng L-Z (2014). Geographic variation of rice yield response to past climate change in China. Journal of Integrative Agriculture 13 (7): 1586-1598. DOI:10.1016/S2095-3119(14)60803-0.

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Abstract

Previous studies demonstrated climate change had reduced rice yield in China, but the magnitude of the reduction and the spatial variations of the impact have remained in controversy to date. Based on a gridded daily weather dataset, we found there were obvious changes in temperatures, diurnal temperature range, and radiation during the rice-growing season from 1961 to 2010 in China. These changes resulted in a significant decline of simulated national rice yield (simulated with CERES-Rice), with a magnitude of 11.5%. However, changes in growing-season radiation and diurnal temperature range, not growing-season temperatures, contributed most to the simulated yield reduction, which confirmed previous estimates by empirical studies. Yield responses to changes of the climatic variables varied across different rice production areas. In rice production areas with the mean growing-season temperature at 12-14 degrees C and above 20 degrees C, a 1 degree C growing-season warming decreased rice yield by roughly 4%. This decrease was partly attributed to increased heat stresses and shorter growth period under the warmer climate. In some rice areas of the southern China and the Yangtze River Basin where the rice growing-season temperature was greater than 20 degrees C, decrease in the growing-season radiation partly interpreted the widespread yield decline of the simulation, suggesting the significant negative contribution of recent global dimming on rice production in China's main rice areas. Whereas in the northern rice production areas with relatively low growing-season temperature, decrease of the diurnal temperature range was identified as the main climatic contributor for the decline of simulated rice yield, with larger decreasing magnitude under cooler areas.

Item Type: Article
Uncontrolled Keywords: Climate change; Yield responses; Rice; China
Research Programs: Ecosystems Services and Management (ESM)
Bibliographic Reference: Journal of Integrative Agriculture; 13(7):1586-1598 (July 2014) (Published online 15 July 2014)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 08:50
Last Modified: 14 Sep 2016 09:24
URI: http://pure.iiasa.ac.at/10893

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