Seedling Performance of New Buckwheat Seed Metering Device

A special seed metering device for buckwheat seeding was developed，and single-factor bench test was used to explore influence of rotating speed of seeding shaft，number of single row holes of seeding sleeve and speed of seed bed on average displacement，variation coefficient of consistent displacement of each row，variation coefficient of total displacement consistency，variation coefficient of seed fragmentation rate and sowing uniformity.When rotational speed of seeding shaft was 150-190 r/min，dispersion coefficient of variation，total displacement uniform coefficient of variation，breakage rate of seeds were 0.22%-2.67%，0.69%-1.31% and 0.27%-0.35%；when number of single-row holes was 3，6 and 12，total displacement uniform coefficient of variation was 1.45%，1.00%，0.95%，and when seedbed was 4-9 km/h，total displacement uniform coefficient of variation was 28.87%-42.26%.When rotation speed of seeding shaft was 150-190 r/min，dispersion coefficient of variation，total displacement uniform coefficient of variation，breakage rate of seeds were consistent performance index requirements；when number of rows of single-row holes was 3，6 and 12，total displacement uniform coefficient of variation conformed to performance index；when speed of seedbed belt was 4-9 km/h，sowing uniformity coefficient of variation of broadcast quantity met requirements of performance index.Speed of seeding shaft，number of single-row holes，and speed of seed bed had a significant influence on displacement.