Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (11): 2575-2583.DOI: 10.3969/j.issn.1004-1524.20231263

• Environmental Science • Previous Articles     Next Articles

Change trend and attribution analysis of water and thermal resources during rice climatological growth period from 1960 to 2019 in China

XU Jinqin1,2(), QIU Xinfa3, ZHU Ping2,*(), XIAO Xiao4   

  1. 1. Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China
    2. Guangdong Meteorological Service Center, Guangzhou 510640, China
    3. School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
    4. Wuhan Regional Climate Center, Wuhan 430074, China
  • Received:2023-11-07 Online:2024-11-25 Published:2024-11-27

Abstract:

Based on the boundary temperature method, the climatological growth period indicators of rice were determined. The temporal variations of water and thermal resources during the climatological growth period of rice in six agricultural regions in China (Northeast China Plain, Huang-Huai-Hai Plain, Sichuan Basin and surrounding regions, Middle-Lower Yangtze Plain, Yunnan-Guizhou Plateau, Southern China) were compared and analyzed. The specific contribution degree of major climate factors to the changes in water and thermal resources during the climatological growth period of rice were quantitatively evaluated. The results showed that the suitable sowing date of rice was significantly (P<0.05) advanced (-0.08 - -0.30 d·a-1), the suitable harvest date was delayed (0.04-0.20 d·a-1), and the climatological growth period was significantly prolonged (0.1-0.5 d·a-1) in the study area during 1960—2019. The accumulated temperature of rice increased significantly, the humidity index decreased, and the variation type of water and thermal resources of rice in the study regions were warm-dry. In the six agricultural regions, the significant increase of accumulated temperature was generally dominated by the increase of the duration days during rice climatological growth period. The decrease of humidity index during rice climatological growth period in Huang-Huai-Hai Plain was dominated by a decrease in precipitation, while the decrease of humidity index during rice climatological growth period in the other agricultural regions was dominated by the significant increase in the potential evapotranspiration. In the future, more attention should be paid to the effects of the significant increase in the duration days and potential evapotranspiration during rice climatological growth period on the rice production.

Key words: climate warming, rice climatological growth period, changes in water and thermal resources

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