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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (12): 81-85.doi: 10.11924/j.issn.1000-6850.casb2022-0364

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The Correlation Between 1000-grain Weight of Spring Wheat and Meteorological Factors in the Most Typical Area of Horqin Sandy Land

DONG Jiarui()   

  1. Naiman County Meteorological Bureau, Tongliao, Inner Mongolia 028300
  • Received:2022-05-07 Revised:2022-07-28 Online:2023-04-25 Published:2023-04-21

Abstract:

The aim of this study is to find out the influence of meteorological conditions on 1000-grain weight of spring wheat, especially the influence laws and characteristics, in the most typical area of Horqin sandy land. The spring wheat observation data and surface meteorological observation data of Naiman National Meteorological Observing Station in recent 28 years were adopted to carry out the correlation analysis and regression analysis. The results showed that there was a negative correlation between the sunshine hours in the late growth stage of spring wheat and 1000-grain weight. The correlation coefficient of heading-mature stage was -0.485, and the correlation coefficient of milk maturity-mature stage was -0.444. There was a positive correlation between the diurnal temperature difference of flowering-milk maturity and 1000-grain weight, and the correlation coefficient was 0.392. Lower air relative humidity is required at booting-heading stage, with a correlation coefficient of -0.540. Spring wheat roots at flowering stage need higher soil relative humidity, with a correlation coefficient of 0.527. The predictive regression model for 1000-grain weight of spring wheat was established, which has a high degree of fitting, and can provide a basis for spring wheat planting management and yield forecast in the future.

Key words: spring wheat, 1000-grain weight, meteorological factors, sunshine, temperature, humidity, correlation analysis