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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (32): 95-101.doi: 10.11924/j.issn.1000-6850.casb2025-0298

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Effects of Sowing Date Adjustment on Maize Yield and Meteorological Adaptability in Hohhot City

JIA Yuanyuan1(), WANG Ying2(), XIA Junbo1, TIAN Xin1, LI Haibo1, GONG Zihui3, LI Lu1   

  1. 1 Saihan District Meteorological Bureau of Hohhot City, Hohhot 010020
    2 Hohhot Meteorological Bureau, Hohhot 010020
    3 Naiman District Meteorological Bureau of Tongliao City, Naiman District, Inner Mongolia 028300
  • Received:2025-04-15 Revised:2025-10-22 Online:2025-11-18 Published:2025-11-18

Abstract:

To investigate the effects of adjusting sowing dates on maize yield and meteorological adaptability in Hohhot, and to identify the optimal sowing period for optimizing cultivation practices and enhancing productivity, a field trial was conducted in Saihan District, Hohhot, in 2024 using the waxy maize variety ‘Hetiannuo 1’ with three sowing dates (April 21, May 9, and May 22). Growth stages, yield components, and meteorological factors were analyzed through field experiments and weather observations. A randomized block design was adopted to record data on growth phases and yield parameters for each sowing treatment. Delayed sowing shortened the total growth period, and accumulated temperature (≥10°C) and sunshine duration showed positive correlations with growth duration. The highest yield was observed in the May 9 sowing treatment, which exhibited superior grain number per ear and 100-grain weight compared to other sowing dates. Correlation analysis revealed that accumulated temperature and sunshine during the tasseling-to-milking stage significantly enhanced yield, while excessive rainfall during the milking-to-maturity stage reduced grain number and yield. The optimal sowing date for maize in Hohhot is May 9, and it ensures balanced utilization of light, thermal and water resources, mitigates risks of heat stress and prolonged rain, improves ear development, and maximizes yield. These findings provide scientific basis for the optimization of local maize planting system and the improvement of yield and climate adaptability.

Key words: Hohhot, sowing date, maize, growth and development, yield, meteorological factors