Abstract: In order to enable a mechanized cassava planting model with large ridges and double rows, a ridge‑type wide‑narrow row cassava planter was developed. This planter integrated multiple operations including ditching, fertilizing, cassava stalk cutting, seed stem discharging, and soil covering. The key components of the prototype were designed, and the working parameters for the fertilizing system, roller‑type stalk cutting mechanism, and chute‑type seed stem discharging system were established. In addition, the operation process of the cassava stalk cutting and seed stem arranging device was analyzed to determine the conditions necessary to achieve the required soil covering thickness for the cassava seed stems. Field test results demonstrated that, at an operational speed of 0.5 m/s to 0.9 m/s, the qualified rate of seed sections reached ≥ 98.3%, the missed seeding rate was ≤ 0.4%, and the exposed seed rate was 0%. The fertilizer coverage rate was 100%, with a fertilization amount deviation of only 3.2%. The qualified rate of seed stem depth reached 97.6%, and the productivity ranged between 0.4 hm2/h and 0.56 hm2/h. All test indicators met industry standards, and the test results confirmed that the planter fulfilled both the design expectations and practical operational requirements.

Key words: cassava planter, large ridge wide and narrow row, fertilizing system； seeding device； stalk cutting mechanism； whole?stalk style

摘要： 为实现木薯大垄双行机械化种植模式，设计一种开沟、施肥、切种、排种、覆土一体化作业的垄作式宽窄双行木薯种植机。对样机关键部件进行设计，确定其施肥装置、对辊式切种机构、滑槽式排种系统工作参数，同时分析木薯切种排种装置作业过程，得到满足木薯种茎覆土厚度的必要作业条件。田间试验结果表明，当作业速度为0.5~0.9 m/s时，种段合格率≥98.3%、漏播率≤0.4%、露种率为0%、肥料覆盖率为100%、施肥量偏差为3.2%、种植深度合格率为97.6%、生产率为0.4~0.56 hm2/h，试验指标均符合行业标准要求，试验结果满足设计和实际作业要求。

关键词: 木薯种植机, 大垄宽窄行, 施肥装置, 排种装置, 切种机构, 整秆式