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Design and Performance Testing of a Multi-Variety Forage Grass Mixed-Sowing Seed Metering Device

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  • Wenxue Dong

    (College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China)

  • Anbin Zhang

    (College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China)

  • Qihao Wan

    (Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Hohhot 010013, China)

  • Fei Liu

    (College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China)

  • Yingsi Wu

    (College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China)

  • Yin Qi

    (College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China)

  • Yuxing Ren

    (College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China)

Abstract

Traditional fluted roller seed metering devices exhibit unstable seeding rates during forage seed mixed sowing. To address this issue, a new seed metering device was designed based on the agronomic requirements of forage seed mixing and the structural characteristics of fluted roller mechanisms. The discrete element method (DEM) was employed to numerically simulate the movement of particles within the seed metering device. Single-factor experiments identified optimal parameter ranges for the seed metering device: a metering shaft speed of 10–20 r/min, a seed inlet width of 8–24 mm, and a seed outlet height of 10–20 mm. A response surface methodology (RSM) experiment was then designed using Design-Expert 13 software. The results yielded optimal operating parameters: a metering shaft speed of 18.9 r/min, a seed inlet width of 9.3 mm, and a seed outlet height of 14.4 mm. The field experiment validated the seeding performance with the optimal parameter combination. The coefficient of variation ( CV ) for the first-class seed ( CV 1 ) was 4.16%, and for the second-class seed ( CV 2 ) it was 2.98%, both of which met the requirements for mixed sowing of forage.

Suggested Citation

  • Wenxue Dong & Anbin Zhang & Qihao Wan & Fei Liu & Yingsi Wu & Yin Qi & Yuxing Ren, 2025. "Design and Performance Testing of a Multi-Variety Forage Grass Mixed-Sowing Seed Metering Device," Agriculture, MDPI, vol. 15(16), pages 1-19, August.
    • Handle: RePEc:gam:jagris:v:15:y:2025:i:16:p:1788-:d:1729420
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