Simulating climate change impacts and potential adaptations on rice yields in the Sichuan Basin, China

• Published in: Mitigation and adaptation strategies for global change Vol. 22; no. 4; pp. 565 - 594
• Main Authors: Xu, Che-Chen, Wu, Wen-Xiang, Ge, Quan-Sheng, Zhou, Yang, Lin, Yu-Mei, Li, Ya-Mei
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.04.2017; Springer Nature B.V
• Subjects: Adaptation; Agricultural production; Atmospheric Sciences; Carbon dioxide; Climate change; Climate Change Management and Policy; Computer simulation; Crop production; Crop yield; Earth and Environmental Science; Earth Sciences; Environmental impact; Environmental Management; Food security; Global climate; Greenhouse effect; High temperature; Laboratories; Natural resources; Original Article; Oryza; Planting date; Rain; Rice; China; China, People's Rep; Sichuan Basin; Climate change; CERES-Rice model; Impact adaptation; Rice production
• ISSN: 1381-2386; 1573-1596
• DOI: 10.1007/s11027-015-9688-2

Rice ( Oryza ) is a staple food in China, and rice yield is inherently sensitive to climate change. It is of great regional and global importance to understand how and to what degree climate change will impact rice yields and to determine the adaptation options effectiveness for mitigating possible adverse impacts or for taking advantage of beneficial changes. The objectives of this study are to assess the climate change impact, the carbon dioxide (CO 2 ) fertilization effect, and the adaptation strategy effectiveness on rice yields during future periods (2011–2099) under the newly released Representative Concentration Pathway (RCP) 4.5 scenario in the Sichuan Basin, one of the most important rice production areas of China. For this purpose, the Crop Estimation through Resource and Environment Synthesis (CERES)-Rice model was applied to conduct simulation, based on high-quality meteorological, soil and agricultural experimental data. The modeling results indicated a continuing rice reduction in the future periods. Compared to that without incorporating of increased CO 2 concentration, a CO 2 fertilization effect could mitigate but still not totally offset the negative climate change impacts on rice yields. Three adaptive measures, including advancing planting dates, switching to current high temperature tolerant varieties, and breeding new varieties, could effectively offset the negative climate change impacts with various degrees. Our results will not only contribute to inform regional future agricultural adaptation decisions in the Sichuan Basin but also gain insight into the mechanism of regional rice yield response to global climate change and the effectiveness of widely practiced global thereby assisting with appropriate adaptive strategies.