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Design of the compact, stable vertical rice seedling frame for cold regions with DLI-based dynamic light control.

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Title: Design of the compact, stable vertical rice seedling frame for cold regions with DLI-based dynamic light control.
Authors: Guo, Lifeng1,2 guolifeng@neau.edu.cn, Wu, Fahui2, Huang, Junjie2,3, Wang, Yizhe2,3, Bao, Yujian2,3, Wu, Yuzhu2,3, Tang, Ru4, Su, Zhongbin3, Xie, Qiuju1, Ma, Zheng1,3, Wang, Liwei1,3, Zhang, Xin5
Source: International Journal of Agricultural & Biological Engineering. Apr2026, Vol. 19 Issue 2, p112-119. 8p.
Subjects: Seedling quality, Structural analysis (Engineering), Photometry, Agriculture, Greenhouses
Abstract: Traditional flat-bed rice nurseries in cold regions require large areas and suffer from inefficient tray movement and instability. A compact vertical rice seedling frame is developed in this work, which integrates a triangular-stabilized tray support, a four-point conveying mechanism, and anti-tilt/anti-torsion features, coupled with a dynamic lighting control strategy based on daily light integral (DLI). The mechanical design was validated by finite-element analysis under design loads, and collision-free operation was confirmed by digital mock-up simulation and prototype tests. In greenhouse trials comparing the vertical frame to conventional flat cultivation, the frame increased space-use efficiency to AP = 119.29% (i.e., = 19.29% higher than the flat bench), while maintaining seedling coverage at 98%±1% (ns) and stem diameter (ns), and producing significantly shorter (more compact) seedlings (p<0.05; a/b). These results demonstrate a practical pathway for high-density automated seedling production in cold climates using intelligent vertical systems. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Agricultural & Biological Engineering is the property of International Journal of Agricultural & Biological Engineering and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Design of the compact, stable vertical rice seedling frame for cold regions with DLI-based dynamic light control.
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  Label: Abstract
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  Data: Traditional flat-bed rice nurseries in cold regions require large areas and suffer from inefficient tray movement and instability. A compact vertical rice seedling frame is developed in this work, which integrates a triangular-stabilized tray support, a four-point conveying mechanism, and anti-tilt/anti-torsion features, coupled with a dynamic lighting control strategy based on daily light integral (DLI). The mechanical design was validated by finite-element analysis under design loads, and collision-free operation was confirmed by digital mock-up simulation and prototype tests. In greenhouse trials comparing the vertical frame to conventional flat cultivation, the frame increased space-use efficiency to AP = 119.29% (i.e., = 19.29% higher than the flat bench), while maintaining seedling coverage at 98%&#177;1% (ns) and stem diameter (ns), and producing significantly shorter (more compact) seedlings (p&lt;0.05; a/b). These results demonstrate a practical pathway for high-density automated seedling production in cold climates using intelligent vertical systems. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of International Journal of Agricultural &amp; Biological Engineering is the property of International Journal of Agricultural &amp; Biological Engineering and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.25165/j.ijabe.20261902.10316
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 112
    Subjects:
      – SubjectFull: Seedling quality
        Type: general
      – SubjectFull: Structural analysis (Engineering)
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      – SubjectFull: Photometry
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      – SubjectFull: Agriculture
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      – SubjectFull: Greenhouses
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      – TitleFull: Design of the compact, stable vertical rice seedling frame for cold regions with DLI-based dynamic light control.
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              Text: Apr2026
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              Y: 2026
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