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Open AccessArticle

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

1
International Institutes for Earth System Science, Nanjing University, Nanjing 210023, China
2
Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 200023, China
3
School of Forestry & Bio-Technology, Zhejiang A&F University, Lin’an 311300, China
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Institute of Environment Sciences, Department of Biology Sciences, University of Quebec at Montreal, Montreal, QC H3C 3P8, Canada
5
School of Earth Sciences and Engineering, Hohai University, No. 8 Fo cheng xi Road, Nanjing 211100, China
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2018, 15(5), 839; https://doi.org/10.3390/ijerph15050839
Received: 20 March 2018 / Revised: 14 April 2018 / Accepted: 17 April 2018 / Published: 24 April 2018
(This article belongs to the Special Issue Climate Change and Health: An Interdisciplinary Perspective)
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. View Full-Text
Keywords: drought; crop; yield; agronomic traits; meta-analysis drought; crop; yield; agronomic traits; meta-analysis
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Zhang, J.; Zhang, S.; Cheng, M.; Jiang, H.; Zhang, X.; Peng, C.; Lu, X.; Zhang, M.; Jin, J. Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis. Int. J. Environ. Res. Public Health 2018, 15, 839.

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