Improvement and Parameter Optimization of Cyperus esculentus Air Sucker Type Seed Metering Device

In order to change existing seed metering technology of Cyperus esculentus, achieve precise seed metering, improve seed quality, seeding efficiency and comprehensive economic benefits of Cyperus esculentus, through physical measurement of three-axis size of Cyperus esculentus, seed metering disk was modified, test platform was designed and built．Single factor test and orthogonal test optimization verification showed that the best working parameters of seed metering disc were 6.5 mm diameter of air suction disc, 25 r/min of rotation speed, 6.5 kPa of negative pressure value, and 0.52% of missed seeding rate．The air-suction seed metering disc realized efficient and precise seed metering, and conformed to technical requirements of Cyperus esculentus seeding, providing a basis for selection of air-suction seed metering device of Cyperus esculentus seeder．