Design and experimental study of a precision fluid hill-drop planter for maize

Area of Science:

• Agricultural Engineering
• Precision Agriculture
• Soil Science

Background:

• Maize cultivation in Southwest China's hilly regions faces challenges with planting precision, seed damage, terrain adaptability, and water use.
• Existing planters often exhibit poor performance, leading to reduced crop yields and inefficient resource utilization.

Purpose of the Study:

• To design and evaluate a novel precision maize hill-drop planter integrating fluid control and zero-speed seeding theory.
• To address limitations of traditional seeders, focusing on improved planting precision, reduced seed damage, and enhanced water-use efficiency.

Main Methods:

• A precision fluid hill-drop planter was developed with seed-liquid separation and terminal mixing.
• Comparative bench tests were conducted against a traditional spoon-wheel seeder.
• Performance was assessed using CFD-DEM coupled simulation and experiments measuring seeding precision, hill-forming, and fluid performance.

Main Results:

• The new planter achieved a qualified seeding index exceeding 91% (12.5% improvement) within 1.2–1.6 m/s operating speed.
• Seed bounce distance was reduced by 63.2% to within 5.4 mm.
• Excellent operational stability was observed with <2% variation in water application and <3% check valve leakage.

Conclusions:

• The developed precision fluid hill-drop planter offers superior performance and reliability compared to conventional methods.
• It provides an effective technical solution for enhancing sowing uniformity and water-use efficiency in complex terrains.
• This innovation supports sustainable maize cultivation practices in challenging agricultural environments.