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<p>This study was conducted to analyze meteorological changes in the central plain of Korea due to climate change and to determine the optimal sowing date for soybean cultivars (<i>Glycine max</i> (L.) Merr.) During the 2024 cultivation period, the average temperature rose by 1.6&#xa0;°C compared to the 30-year historical average, accompanied by distinct climate change patterns such as concentrated rainfall in mid-July. As the sowing date was delayed from I to IV, both the duration of vegetative and reproductive growth stages and the accumulated temperature (GDD) showed a decreasing trend. While early sowing (I) intensified lodging due to excessive vegetative growth, later sowing dates (e.g., IV) led to improved grain filling and 100-seed weight. In particular, sowing in mid-June (III) achieved the optimal GDD range (2,500 to 3,000&#xa0;°C) and minimized lodging damage, resulting in the highest grain yield and seed quality. Therefore, this study provided fundamental data and growth characteristics by sowing date to promote stable production, maximum yield, and enhanced seed quality of soybeans in the central plains of Korea under shifting climatic conditions. These findings will serve as crucial baseline data for establishing climate-adaptive optimal sowing windows and enhancing farm productivity in the future.</p>

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Comparison of growth and yield characteristics of soybeans for tofu and soy-paste by sowing date in the central plain area of Korea

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Se Eun Chae,
  • Chaewon Lee,
  • Seung Ho Jeon

摘要

This study was conducted to analyze meteorological changes in the central plain of Korea due to climate change and to determine the optimal sowing date for soybean cultivars (Glycine max (L.) Merr.) During the 2024 cultivation period, the average temperature rose by 1.6 °C compared to the 30-year historical average, accompanied by distinct climate change patterns such as concentrated rainfall in mid-July. As the sowing date was delayed from I to IV, both the duration of vegetative and reproductive growth stages and the accumulated temperature (GDD) showed a decreasing trend. While early sowing (I) intensified lodging due to excessive vegetative growth, later sowing dates (e.g., IV) led to improved grain filling and 100-seed weight. In particular, sowing in mid-June (III) achieved the optimal GDD range (2,500 to 3,000 °C) and minimized lodging damage, resulting in the highest grain yield and seed quality. Therefore, this study provided fundamental data and growth characteristics by sowing date to promote stable production, maximum yield, and enhanced seed quality of soybeans in the central plains of Korea under shifting climatic conditions. These findings will serve as crucial baseline data for establishing climate-adaptive optimal sowing windows and enhancing farm productivity in the future.