Design, DEM Simulation, and Field Experiments of a Novel Precision Seeder for Dry Direct-Seeded Rice with Film Mulching

Existing devices for dry direct-seeded rice with film mulching in northern China have limitations such as imprecise sowing, unadjustable sowing depth, and seeding device blocking. In this regard, study proposes a combined method of ‘mini shovel + telescopic pipe’ mulching. A precision seeder was developed through theoretical calculations, discrete element modelling (DEM) simulations, field experiments. The configuration diameter the rollers were obtained. Twelve pipes evenly distributed on circumference roller, contact ratio exceeding one. This reduced slip rate roller effectively. Subsequently, DEM used to develop 33 central composite design. response surface established depth value. According agronomic requirements, set 20 mm. optimal combination working parameters obtained by optimizing regression equation. experiments showed that performance satisfied requirements agricultural production, stably reliably. represents useful solution