Title: Impacts of nighttime warming on rice growth, physiological properties and yield under water saving irrigation

Authors: Zhen Zhang; Yunsheng Lou; Jun Li; Rui Li; Li Ma

Addresses: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China; Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China ' Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China; Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China ' Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China ' Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China ' Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China

Abstract: Asymmetric diurnal warming is one of the main features of global climate warming. More attention has been paid to the impacts of nighttime warming on rice production. However, how rice responds to nighttime warming under water saving irrigation is still unclear. A field experiment was conducted to investigate the effects of nighttime warming on rice growth, physiological properties, and grain yield under water saving irrigation. The results indicated that, nighttime warming significantly increased leaf area index (LAI) of rice at tillering stage but reduced it at jointing-maturity stage. Nighttime warming decreased grain yield by 17.2% and 12.98% under flooding (traditional irrigation) and wetting (water saving irrigation) conditions, respectively. The above findings indicate that wetting treatment is feasible in rice production instead of flooding treatment under future climate warming.

Keywords: nighttime warming; wetting irrigation; physiological properties; rice; grain yield.

DOI: 10.1504/IJGW.2020.108182

International Journal of Global Warming, 2020 Vol.21 No.2, pp.105 - 119

Received: 31 Jul 2019
Accepted: 16 Mar 2020
Published online: 03 Jul 2020 *

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