Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis

Jinmeng Zhang, Shiqiao Zhang, Min Cheng, Hong Jiang, Xiuying Zhang, Changhui Peng, Xuehe Lu, Minxia Zhang and Jiaxin Jin
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Jinmeng Zhang: International Institutes for Earth System Science, Nanjing University, Nanjing 210023, China
Shiqiao Zhang: International Institutes for Earth System Science, Nanjing University, Nanjing 210023, China
Min Cheng: International Institutes for Earth System Science, Nanjing University, Nanjing 210023, China
Hong Jiang: International Institutes for Earth System Science, Nanjing University, Nanjing 210023, China
Xiuying Zhang: International Institutes for Earth System Science, Nanjing University, Nanjing 210023, China
Changhui Peng: Institute of Environment Sciences, Department of Biology Sciences, University of Quebec at Montreal, Montreal, QC H3C 3P8, Canada
Xuehe Lu: International Institutes for Earth System Science, Nanjing University, Nanjing 210023, China
Minxia Zhang: International Institutes for Earth System Science, Nanjing University, Nanjing 210023, China
Jiaxin Jin: School of Earth Sciences and Engineering, Hohai University, No. 8 Fo cheng xi Road, Nanjing 211100, China

IJERPH, 2018, vol. 15, issue 5, 1-14

Abstract: Drought has been one of the most important limiting factors for crop production, which deleteriously affects food security worldwide. The main objective of the present study was to quantitatively assess the effect of drought on the agronomic traits (e.g., plant height, biomass, yield, and yield components) of rice and wheat in combination with several moderators (e.g., drought stress intensity, rooting environment, and growth stage) using a meta-analysis study. The database was created from 55 published studies on rice and 60 published studies on wheat. The results demonstrated that drought decreased the agronomic traits differently between rice and wheat among varying growth stages. Wheat and rice yields decreased by 27.5% and 25.4%, respectively. Wheat grown in pots showed greater decreases in agronomic traits than those grown in the field. Rice showed opposite growing patterns when compared to wheat in rooting environments. The effect of drought on rice increased with plant growth and drought had larger detrimental influences during the reproductive phase (e.g., blooming stage, filling stage, and maturity). However, an exception was found in wheat, which had similar decreased performance during the complete growth cycle. Based on these results, future droughts could produce lower yields of rice and wheat when compared to the current drought.

Keywords: drought; crop; yield; agronomic traits; meta-analysis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

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