The utility model provides a close and the compaction of ditch dug with a plow all obtain modified seeding part, still lie in having the seeding part of adjusting the compaction pressure system more effectively. The utility model relates to a seeding part including modified closing device. It includes the support, and the system of burying, depth control device and closing device install on the support, and the depth control device passes through the first hinge of axis horizontally to be fixed on the support, and the axle of first hinge extends after the depth control device, and closing device extends after the depth control device and fix on the support through axis horizontally A second hinge, and closing device has around an at least compaction wheel of pivot. Outstanding part lies in that the distance between pivot and the A second hinge is more than or equal to the distance between pivot and the first hinge. Because this characteristic, closing devices action is more even on the ditch dug with a plow, because the lever arm is longer. The ditch dug with a plow is closed and is obtained guaranteeing, and the ditch dug with a plow compaction is even. Still relate to the seeder that has this kind of seeding part.
