主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2023, Vol. 39 ›› Issue (3): 117-123.doi: 10.3969/j.issn.1673-503X.2023.03.014

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Study on the meteorological index of suitable sowing time of Isatis tinctoria in Heilongjiang province

Nong CHEN1(),You-fang ZHANG2,Xiang-ling YUAN1,3,*(),Min-hui YAN1,Jing ZHANG4,Jin-feng ZHANG1,Ling GAO1,Peng-yu YUAN2   

  1. 1. Heilongjiang Meteorological Service Centre, Harbin 150030, China
    2. Heilongjiang University of Chinese Medicine, Harbin 150040, China
    3. Qiqihar Meteorological Service, Qiqihar 161006, China
    4. Qiqihar Market Supervision and Administration Bureau, Qiqihar 161005, China
  • Received:2022-10-30 Online:2023-06-28 Published:2023-07-25
  • Contact: Xiang-ling YUAN E-mail:chennong888@sina.com;154007596@qq.com

Abstract:

In order to provide a scientific basis for the planting of Isatis tinctoria in Heilongjiang province, based on the daily soil temperature and precipitation data from 84 observations in Heilongjiang province from 1991 to 2020, using the 5-day sliding average method, 3-day sliding average method, Krikin interpolation method, mathematical-statistical analysis method, and hierarchical analysis method, the suitability of meteorological conditions at sowing stage of Isatis tinctoria and the effects of sowing at different temperature conditions on yield and active ingredient content of Isatis tinctoria were discussed.The results showed that the optimum sowing time was 12 ℃ with a daily average temperature of 5 cm.The first day of the 5 cm below-ground temperature stable passing 12 ℃ in Heilongjiang province is from May 1 to 30, and its spatial distribution shows a trend of a gradual delay from south to north and from plain to mountain.The general trend is that the first day appeared earlier in Dumeng, Tailai, Gannan, Zhaoyuan, and Wuchang, while the first day appeared later in Mohe, Huzhong, Xinlin, Tahe, Wuyiling, Jiayin, and Suifenhe.

Key words: Isatis tinctoria, Sowing, Suitable period

CLC Number: