Authors

Abstract

To address the issues of low seedling extraction success rates and high susceptibility to damage caused by excessive adhesion between the root plug and the tray cell during mechanical transplanting of vegetable tray seedlings, this study designed a vibration-based loosening device according to the principle of inertial force. Using tomato seedlings as the research subject, the range of vibration frequency was determined through single-factor experiments. A three-factor, three-level factorial experiment was conducted, with plug moisture content, vibration frequency, and vibration duration as the experimental factors, and the reduction in adhesive force of the plug as the response indicator. The results of variance analysis showed that the established regression model fitted the actual data well. The order of influence of the factors on the response was: vibration frequency, plug moisture content, and vibration duration. Both the individual factors and their interactions had significant effects on the response indicator. Optimal operating parameters were determined through optimization: plug moisture content of 50%, vibration frequency of 35 Hz, and vibration duration of 60 s. Under these conditions, the reduction in adhesive force reached 1.01 N. The experimental results indicate that vibration-based loosening can significantly reduce the adhesive force between the plug and the tray cell, providing a reference for improving seedling extraction success rates and for designing the seedling-picking mechanisms of transplanters.

Abstract in Chinese

针对蔬菜穴盘苗机械化移栽过程中，苗钵与穴孔间粘附力过大导致取苗成功率低、幼苗易损伤等问题，本文设计了一种基于惯性力原理的振动松脱试验台。以番茄穴盘苗为对象，通过单因素试验确定了振动频率范围。以苗钵含水率、振动频率和振动时间为试验因素，苗钵粘附力减少值为试验指标，进行了三因素三水平组合试验。方差分析结果表明，建立的回归模型与实际情况高度拟合，因素影响主次顺序为：振动频率、苗钵含水率、振动时间，各因素及其交互作用对试验指标影响显著。通过优化确定了最优工作参数，当苗钵含水率为50%、振动频率为35Hz、振动时间为60s时，粘附力减少值为1.01N。试验结果表明，振动松脱能显著降低苗钵与穴孔间的粘附力，为提高取苗成功率和移栽机取苗机构设计提供了参考。