Design on peanut no-tillage planter under coverage of the wheat stubble

Abstract. In Huang huaihai plain of China, peanut is often planted in summer after the wheat being harvested, however, it is easy for traditional no-tillage planter to get stuck with high stubble and quite amount of wheat straw covering the field. Therefore, combined with peanut wide-narrow planting agronomic, a no-tillage planter (2BHMX-6) was developed with the functions of crushing the wheat straw, cleaning the field, fertilizing and seeding, covering and compacting soil, straw crushed covering the seeded fields. In order to improve the straw crushing and cleaning performance, a set of Y-shape knives were chosen as stubble cutters, and arranged symmetrically with left and right double helix along the cutter axis. Then the kinematics model and parametric equation of cutter were established, corresponding kinematics simulation was carried out with Solidworks and Adams. Due to the big humidity on field surface after the rain, adjacent narrow seeding row was easily blocked, so the location of opener was optimized. To increase the fluent passing, the arrangement of openers was changed from double beams to three beams. The field test results showed that straw cleaning effect is good, so no-till planter can work fluently despite much wheat straw. And the developed planter achieved average seed sowing deep of 44mm, qualified rate of 89%, dry seed rate of 1.1%, mean fertilizer depth of 56mm, qualified rate of 92%, straw mulching even rate of 88.6%, which indicated that this peanut no-tillage planter can meet the requirements of the peanut agronomic.