Journal of Tianjin Agricultural University ›› 2025, Vol. 32 ›› Issue (6): 1-7.doi: 10.19640/j.cnki.jtau.2025.06.001

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Spatial-temporal characteristics of chilling injury to rice in Northeast China based on high-resolution meteorological grid data

Qiu Meijuan1, Liu Buchun2,Corresponding Author, Liu Yuan2, Pei Zhongyou1, Li Zhibin1, Song Xiaohui1   

  1. 1. College of Agronomy and Resource Environment, Tianjin Agricultural University, Tianjin 300392, China;
    2. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2024-05-09 Published:2025-12-26

Abstract: Studying the spatial-temporal variation characteristics of delayed chilling injury in rice in Northeast China can provide reference for disaster prevention and reduction. The 5 km×5 km meteorological dataset from 1981 to 2010 provided by Beijing Normal University was used in this study to analyze the spatial-temporal changes in delayed chilling injury to rice in Northeast China. Results showed that the sum of the average temperatures in the rice-growing season increased with each decade, with the anomaly shifting from a negative value to a positive value. Both the frequency and coverage of mild, moderate, and severe chilling injuries decreased. From 1981 to 1990, chilling injuries occurred at the highest frequency with the largest coverage, particularly the severe delayed chilling injuries. From 1991 to 2000, chilling injuries occurred less frequently. From 2001 to 2010, chilling injuries occurred in certain regions and in a few years. The grid points with mild, moderate, and severe delayed chilling injury in rice in the Northeast region showed a reduction in chilling injury, accounting for 36.14%, 47.01%, and 98.20% of the total grid points, respectively. The grid points with first aggravation and then reduction accounted for 30.10%, 21.87%, and 0.53%, respectively. With global warming, the frequency of delayed cold damage, especially that of severe delayed cold damage, is gradually decreasing

Key words: delayed chilling injury, meteorological grid data, rice, Northeast China

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