Problem to be solved: to provide an apparatus and a method for raising and growing plant root systems vertically and vertically growing plant root systems by raising seedling seedlings to the excavation holes without the collapse of the pore wall and raising the seedlings to the excavation holes without the collapse of the pore wall. In particular, provide seedling raising tools for the long root seedlings with the following effects.(1) there is no root roll, and straight root seedling capable of reaching straight soil layer with straight straight roots is obtained.(2) transportation and planting work is easy, and there is no root system damage at work.3.Solution: a long root consisting of a split collecting pipe which has a split surface of a split pipe consisting of a synthetic resin or metal having a length of 50 cm or more and an inner diameter aspect ratio greater than or equal to 5 in the long axis direction or divided into two planes in which the plane is divided into two dimensions Provide seedling raising tools.Diagram【課題】回収型育苗用具にて長根苗を育苗し、孔壁の崩壊が無い掘削孔に、長根苗を植付けた後に育苗用具を回収し、植物根系を垂直下方成長する、育苗・植付けの器具及び方法を提供すること。特に、以下の効果を有する長根苗用の育苗用具を提供すること。 （１）根巻きが無くストレートな直根で安定土壌層に到達可能な長根苗が得られる。 （２）搬送植付け作業が容易で作業時の根系の損傷が無い。 （３）育苗用具は植付け後回収可能。【解決手段】合成樹脂あるいは金属からなり長さが５０ｃｍ以上で内径アスペクト比５以上の円柱開口パイプが長軸方向に２つに切断或いは分割された面が二次元平面をなす分割パイプ、の両分割パイプの分割面同士を相対させた分割集合パイプからなる長根苗の育苗用具を提供する。【選択図】図１
