DEVOLPMENT OF A ROTARY DIBBLE-TYPE CASSAVA PLANTER

ABSTRACT In this study, to meet the requirements of mechanized planting of the wide and narrow double-row ridging cassava cultivation mode, solve the problem of the real-time cutting cassava planter in which cassava stalk cutting length has poor uniformity, and improve the operation performance of the existing precut cassava planters, a rotary dibble-type cassava planter was designed. With its rotary dibble-type stalk metering device, transmission system and other components, the planter can complete the sowing, ditching, soil covering and suppression operations simultaneously. The results of a performance evaluation and an analysis of field trials showed that the variation coefficient of the planting distance was less than 30%, and the planting qualification rate was greater than 95%. The order of factors affecting the variation coefficient of the planting distance was determined to be transmission ratio followed by the forward speed. The order of factors affecting the planting qualification rate was determined to be transmission ratio followed by the forward speed. The results of the variance analysis showed that the influences of the transmission ratio and forward speed on the accuracy of planting distance and the planting qualified rate were significant. The forward speed of the planter operation was recommended to be 0.56 m/s.

摘要：本研究针对宽窄双起垄栽培模式下木薯机械化种植需求，解决实时切秆式木薯播种机存在的木薯茎秆切段均匀性差的问题，提升现有预切式木薯播种机的作业性能，设计了一款旋转穴播式木薯播种机。该播种机搭载旋转穴播式茎秆排种装置、传动系统等核心部件，可一次性完成播种、开沟、覆土及镇压作业。田间试验性能评价与分析结果表明，株距变异系数小于30%，播种合格率大于95%。影响株距变异系数的因素主次顺序为传动比，其次为前进速度；影响播种合格率的因素主次顺序同样为传动比，其次为前进速度。方差分析结果显示，传动比与前进速度对株距精度及播种合格率均具有显著影响。推荐该播种机的作业前进速度为0.56 m/s。