Chinese Journal of Agrometeorology ›› 2020, Vol. 41 ›› Issue (03): 162-172.doi: 10.3969/j.issn.1000-6362.2020.03.005

Previous Articles     Next Articles

 Seedling Freezing Risk Regionalization of Winter-Sowing Potato in Hubei Province

 YE Pei, LIU Ke-qun, SHEN Shuang-he, LIU Zhi-xiong,TANG Yang, FANG Zhi-guo   

  1.  1.College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2.Wuhan Regional Climate Center, Wuhan 430074; 3.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science &Technology, Nanjing 210044; 4.Xiangyang Academy of Agricultural Science, Xiangyang 441057
  • Online:2020-03-20 Published:2020-03-20
  • Supported by:
     

Abstract:  Using the meteorological data and potato phenology survey data in Hubei province from1963 to 2018, the potato seeding dates were calculated by growing degree days method, and then the spatiotemporal distribution characteristics of potato freezing damage during seedling stage were analyzed dynamically, finally, the risk index model of freezing damage was constructed to distinguish the risk level of freezing damage in Hubei province. The results showed that: (1) freezing damage of winter-sowing potato during seedling stage was mainly occurred in the last ten-day of February and the first ten-day of March, especially in the first ten-day of March. (2) Most parts of the southwest of Hubei province were low risk areas, so that the cultivation of winter-sowing potato could be widespread in this region; the northwest and the east of Hubei province were moderate risk areas; and other areas of Hubei province were high risk areas. (3) In warm winters, potato seedlings sprout early and the freezing damage risk is relatively high; while in cold winters, the facts are just the opposite. However, if measures were taken to raise the temperature, the freezing damage risk could be reduced and would make it earlier for market.

Key words:  Winter-sowing potato, Seedling stage, Freezing damage, Risk regionalization

CLC Number: