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 ›› 2020, Vol. 36 ›› Issue (4): 74-82.doi: 10.3969/j.issn.1673-503X.2020.04.010

• Articles • Previous Articles     Next Articles

Change characteristics of farmland soil moisture in Fuyu County and their effects on development period and yield of Maize

Ping YAN1,2,3(),Sheng-tai JI1,2,Yan-kun SUN4,Li-xia JIANG1,2,3,Qiu-jing WANG1,2,3,Jia-jia LV1,2,3,Ping WANG1,2,3,*()   

  1. 1. Meteorological Academician Workstation of Heilongjiang Province, Harbin 150030, China
    2. Innovation and Opening laboratory of Regional Eco-Meteorology in Northeast, China Meteorological Administration, Harbin 150030, China
    3. Heilongjiang Province Institute of Meteorological Science, Harbin 150030, China
    4. Northeast Agricultural University, Harbin 150030, China
  • Received:2019-05-08 Online:2020-08-30 Published:2020-06-16
  • Contact: Ping WANG E-mail:di-chun@163.com;nqzxwp@163.com

Abstract:

This paper analyses the effects of relative soil moisture (RSM) on maize development period and yield so as to provide a scientific basis for the maize production in west Songnen Plain.Taking west Songnen Plain in Fuyu county of Heilongjiang province as the research region, using the RSM data during 1982-2017, the development period and yield of maize during 1995-2017, the change characteristics of RSM and their effects on the development period and yield of maize were investigated based on comparative analysis, correlation analysis, and Mann-Kendall mutation testing methods.The results show that the RSM experiences an increasing-decreasing-increasing change trend in recent 36 years.On average, soil drought occurs every 4-6 years during sowing-emergence, jointing-tasseling, milk-mature stage and occurs every 2-3 years during the tasseling-milk stage.Soil drought does not occur during the emergence-jointing stage.The mutation year of RSM with a decreasing and increasing trend for each development period is around 1987 and 2013, respectively.The RSM is suitable and the drought is lighter in the 1980s.In the 1990s, the RSM declines rapidly, which results in the most severe droughts.Then, the drought gradually eases with the passage of the year.Soil droughts occurring in sowing-emergence and seedling-jointing have little effect on maize yield, and the jointing-maturing period is the key period when a drought affects maize yield.

Key words: Relative soil moisture, Maize, Development period, Yield

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