为提高脱毒微型马铃薯机械化播种水平，保证播种质量，针对脱毒微型马铃薯，设计了一种气力式倾斜圆盘排种器，并对其进行了单因素试验及正交试验。分析了该排种器合格指数、重播指数、漏播指数和变异系数等性能指标与排种轴转速、排种盘倾斜角度、排种盘型孔形式3个要素之间的关系。单因素试验结果表明，上述3个试验因素对排种器性能指标均有显著影响；正交试验结果表明，排种轴转速为10 r/min、排种盘倾斜角度为45°、排种盘型孔形式为9×Φ12 mm圆柱孔时，排种器合格指数达97.62%，漏播指数为0.67%，变异系数为8.94%；研究结果表明，气力倾斜圆盘排种器能满足大粒径且外形个体差异性大的脱毒微型马铃薯的精密播种要求，为大粒径种子的播种提供一个新的方法。%A pneumatic metering device with declined disc was designed for virus-free seed potato in order to improve the mechanization planting level of virus-free seed potato and guarantee the sowing quality. Single factor and orthogonal experiments were carried out. The relationships of performance indexes such as eligible index, multiple index, miss index and coefficient of variation with the rotational speed of metering shaft, tilt angle of metering disc and the shaped hole form of metering disc were analyzed. Single factor experiment showed that performance indexes were remarkably influenced by those three factors. Orthogonal experiment indicated that the eligible index reached as high as 97.62%, the miss index was 0.67%, and the coefficient of variation was 8.94%; while the rotational speed of metering shaft was 10 r/min, tilt angle of metering disc was 45°, and the shaped hole form of metering disc was cylindrical hole with 9 ×Φ12 mm. The result of the study showed that pneumatic metering device with declined disc could meet the precision seeding requirements for virus-free seed potatoes with large piece and great differences in shape, and provide a new method for large piece seeds.
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