Climate zones determine where substantial increases of maize yields can be attained in Northeast China

Zhijuan Liu, Xiaoguang Yang (), Xiaomao Lin, Prasanna Gowda, Shuo Lv and Jing Wang
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Zhijuan Liu: China Agricultural University
Xiaoguang Yang: China Agricultural University
Xiaomao Lin: Kansas State University
Prasanna Gowda: USDA-ARS Grazinglands Research Laboratory
Shuo Lv: China Agricultural University
Jing Wang: China Agricultural University

Climatic Change, 2018, vol. 149, issue 3, No 14, 473-487

Abstract: Abstract As the growth in global population has led to greater demands for food and energy, societies have been pressured to increase food production. Closing the gap between current and potential yields is one means of producing more food. In this study, we first identify the gaps between the potential yield and actual on-farm yield of maize for ten climate zones (CZs) in Northeast China (NEC) from 1961 to 2010. We then use trend analysis to assess yield gaps caused by suboptimal water availability (YGw). Finally, we identify the CZs where maize yields could be increased through improved irrigation management. Nonparametric trend analysis showed an estimated regional area-averaged yield gap of 64% between potential yield and actual on-farm yield; this gap decreased by 11.0% per decade over the study period (p

Date: 2018
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DOI: 10.1007/s10584-018-2243-x

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