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Chinese Journal of Applied Ecology ›› 2020, Vol. 31 ›› Issue (5): 1625-1635.doi: 10.13287/j.1001-9332.202005.030

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Spatial-temporal characteristics of agricultural climate resources and sterile-type chilling injury in rice growing season in three provinces of Northeast China

SHI Yan-ying, GUO Er-jing, ZHANG Zhen-tao, ZHU Xi, YANG Xiao-guang*   

  1. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
  • Received:2020-02-10 Online:2020-05-15 Published:2020-05-15
  • Contact: * E-mail: yangxg@cau.edu.cn
  • Supported by:
    This work was supported by the National Nature Science Foundation of China (31661143012).

Abstract: Based on daily meteorological data and agro-meteorological data in three provinces of Northeast China during 1981-2017, combined with chilling injury indices, we analyzed the spatial-temporal distribution characteristics of solar, heat, precipitation resources and sterile-type chilling injury in rice growing season, especially in the booting and flowering stages. In 1981-2017, agriculture climatic resources in rice growing season showed a warming, drying and darkening trend. Accumulated temperature (≥10 ℃) and sunshine hours increased with a rate of 73.5 ℃·d·(10 a)-1 and 17.7 h·(10 a)-1 respectively, while precipitation decreased with a rate of 8.9 mm·(10 a)-1. At the booting stage, agricultural climatic resources showed a warming, drying and dar-kening trend. Daily average temperature increased 0.27 ℃·(10 a)-1 and sunshine hours and preci-pitation decreased 2.06 h·(10 a)-1 and 1.90 mm·(10 a)-1 respectively. At the flowering stage, agricultural climatic resources showed a trend of warming, wetting and darkening. Daily average temperature increased with a rate of 0.12 ℃·(10 a)-1, while sunshine hours decreased with a rate of 0.83 h·(10 a)-1. In contrast to that at the booting stage, precipitation in the flowering stage increased with a rate of 1.35 mm·(10 a)-1. Under the background of climate warming, the frequency and intensity of rice sterile-type chil-ling injury decreased in most regions, with significant inter-decadal fluctuations. During the study period, the frequency and intensity of sterile-type chil-ling injury were the highest in Heilongjiang Province, moderate in Jilin Province, and the lowest in Liaoning Province.

Key words: three provinces of Northeast China, rice, agroclimatic resource, sterile-type chilling injury