PROBLEM TO BE SOLVED: To provide a method for detecting rooting of a tree, which enables detection of a state of fine roots at the initial stage of rooting without digging up soil. SOLUTION: In rooting a tree root 21 of a tree 20, a porous tubular member 14 having at least an open upper surface is used, and the tubular member is placed on the soil on a virtual line where the rooting 22 is expected to grow. Is buried in the vertical direction while leaving its internal space, and the rooting state is detected by observing the roots extending across the internal space of the tubular member from the upper surface opening of the tubular member. I made it. [Selection diagram] Fig. 1【課題】土壌を掘り起こすことなく、発根初期の細根の状態をも検知することができるようにした樹木発根の検知方法を提供する。【解決手段】樹木２０の樹根２１を発根させるにあたり、少なくとも上面が開口された多孔性の筒状部材１４を用い、発根２２が伸びると想定される仮想ライン上の土壌に筒状部材をその内部空間を残したままの状態で縦方向に埋設し、筒状部材の内部空間を横断して伸びる樹根を筒状部材の上面開口から観察することによって発根の状態を検知するようにした。【選択図】図１
