Parameter Analysis and Field Tests of a Double Crank Multi-Rod under Plastic-Film Hill-Drop Mechanism Potato Planter

Abstract

The new technology of filming in autumn and planting directly through the plastic film in spring is an effective water-saving method and drought-resistance commercial potato production. However, filming first and then planting is not compatible with the working of known potato mulching planters. In order to realize the hill-drop under plastic-film in potato seeding, a double crank multi-rod mechanism has been designed and a prototype built. Using computer-aided design software, the effect of several kinematic parameters upon the motion of the planter dibber has been systematically investigated. A mechanism with optimized parameters has then been built and tested in a dry farming area of the Loessal Plateau of Northwest China. Results showed that the qualified rate of sowing depth under plastic-film was 92%, the rate of hole dislocation was 5%, the qualified rate of hole distance was 88% and the mechanical-damage degree of plastic-film lighting surface was 52.1 mm/m2. The proposed planter meets all the agronomic requirements of hill-drop on plastic-film potato planting, and has the potential to perform well in other geographic areas, where comparable farming conditions exist.