2BFM-5型山地免耕播种机的设计与试验

    Design and field experiments of 2BFM-5 hilly no-tillage seeder

    • 摘要: 针对黄土高原丘陵水蚀区残茬覆盖免耕播种及抗旱播种的作业要求,研制了以8.8~11.0?kW手持拖拉机为动力源的2BFM-5型山地免耕播种机。该播种机采用长翼尖角组合式种肥分施开沟器、复合铰链前位双轮仿形机构和螺旋齿槽轮排种器。田间试验表明:该播种机排种均匀性变异系数为35.4%,播深合格率为81.8%,平均种肥间距为44.0?mm,化肥集中在90~100?mm土层范围内,地表可形成宽66~85?mm、深40~52?mm的小垄沟,各项技术性能满足农业种植要求。该播种机适应中国黄土高原丘陵水蚀区缓坡地(<15°)和水平梯田的免耕播种,满足雨养农业区播种技术的“深种浅覆、镇压提墒、集雨抗旱”等要求。

       

      Abstract: According to the operational requirements for stubble mulch no-till sowing and drought-resistance sowing in the water erosion area of Loess Plateau,2BFM-5 hilly no-till seeder has been developed, whose power source was a hand tractor with 8.8-11.0kW power. The seeder adopted the long-wing and cusp combined opener in which the seed and the fertilizer were discharged separately, and the double-wheel profiling mechanism with ante-position compound hinges and the helical tooth fluted wheel. The field experiment showed that the seeding uniformity variation coefficient of this seeder was 35.4%, sowing depth qualified rate was 81.8%.The average distance between seed and fertilizer was 44.0 mm, the fertilizer was concentrated in the soil range of 90-100 mm, and the ground surface could form the small furrow which width was 66-85 mm and depth was 40-52 mm. Every technical performance indices met the requirement of agricultural planting. This seeder is adapt to the no-till sowing in gentle slop (less than 15°)and the level terrace of the water erosion area of Loess Plateau in our China, and also to the seeding technique requirement of “deep sowing and shallow covering, compacting and moisture preservation, rainfall harvesting and drought resistance” and so on in rain fed agricultural region.

       

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