Abstract
In order to solve the problem that traditional millet drilling method needs labor-intensive artificial thinning-out, a hole-seeding method is proposed to replace it. Under hole-seeding conditions, an air-suction millet seed-metering device was designed. The design of air-cutting valve can assure that suction-holes are not clogged and reliably falling seeds. Suction-hole structure of the seed-metering device takes chamfer type. The dimension parameter of the chamfer hole is as follows: diameter of 4 mm, chamfer depth of 2.5 mm, fissuriform bottom of suction-hole is 1 mm width, number of holes is 32. The passing rate of hill spacing, repeat-sowing rate, leak-sowing rate and hill formation were analyzed by seed-metering test platform, which meets the precision of millet seed and agronomic requirements.
Highlights
With the improvement of living standards, people affirm role of millet to balancing dietary structure and therapeutic health care
The planting areas for millet in north China occupies 10-15% of the grain-sown area, ranking the third following those for wheat and corn
Millet precise seeding is the crucial process of production
Summary
With the improvement of living standards, people affirm role of millet to balancing dietary structure and therapeutic health care. The vacuum space (air space) which has negative pressure produces the pressure difference in both sides of the seed suction shell, under the action of the negative pressure, seeds in the seed chamber are sucked onto the shaped orifice and rotate with the seedmetering device.
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