Technological Parameter Optimization of Double-Press Precision Depth-Control Seeding and Its Application in Rice Production

作者：Yangjie Shi, Xuwen Shen, Xinhui Cheng, Jintao Xu, Jiawang Hong, Lianjie Han, Xiaobo Xi, Ruihong Zhang · 发表于：Agronomy · 年份：2025 · DOI：10.3390/agronomy15071704 · 被引用次数：3 · 研究领域：Soil Mechanics and Vehicle Dynamics、Rice Cultivation and Yield Improvement、Agricultural Engineering and Mechanization

Current rice cultivation relies on mechanical transplanting, which is costly and complex, and direct seeding, which suffers from poor quality and low efficiency. To address these issues, a double-press precision depth-control seeding method was developed in this study. Discrete element modeling (DEM) was employed to optimize key operational parameters—compaction force, soil covering cutter rotational speed, and penetration depth—using qualified seeding depth and missed seeding rates as performance metrics. Optimal results were achieved at a 60 kPa compaction force, a 300 rpm rotational speed, and a 7 cm penetration depth. A prototype seeder was manufactured and evaluated in three-year field trials against conventional dry direct seeders and mechanical transplanters. The double-press seeder demonstrated significantly superior performance compared to conventional direct seeding. It optimized the crop population structure by maintaining a high tiller number while increasing the productive tiller rate, resulting in stable annual yields exceeding 10.11 t·hm−2. Although its yield was slightly lower than that of mechanical transplanting, the double-press seeder offers a compelling practical alternative due to its operational convenience and economic benefits.