Tool, system, method, and plant for promoting growth of seedling, seedling set for planting, and planting method

摘要

The present invention is to provide a technology capable of planting seedlings smoothly in actual soil in planting ground such as dry land and allowing the seedling to root securely and grow without artificially supplying water continuously. Not only is a seedling fixed inside an upper opening portion of a tube having a length reachable to a deep water-containing layer in the planting ground but also a raising medium is put inside the tube at a hardness that allows the root of the seedling to grow long downward, and the root of the seedling is allowed to grow below the tube, thereby obtaining the seedling having a long root. A vertical hole having approximately the same diameter as that of the tube is dug in the ground of the planting ground until reaching a soil layer having water quality and water quantity necessary for growth of plant, the seedling having the long root is buried in the vertical hole together with the tube, thereby planting the seedling in the planting ground.