PROBLEM TO BE SOLVED: To provide methods for growing trees to become noncombustible or fire-resistant woods.SOLUTION: A trunk outer circumferential surface 5 of a living tree 1 is provided with a plurality of holes 1a, 1a, ... as well as 1b, 1b, ..., at a lower end portion near a ground 3 so as to incline toward a central axis, an incombustible agent 8 is injected in the hole, the incombustible agent 8 filled in the hole 1a is sucked up along a plurality of conduits formed in a trunk 4 to spread almost all over the trunk 4.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】 不燃性又は難燃性の木材となる樹木を生育する方法の提供。【解決手段】 生きている樹木1の幹外周面5には、地面3に近い下端部に複数の穴1a,1a・・・、1b,1b・・・を中心軸に向いて傾斜して設け、この穴には不燃剤8を注入し、穴1aに満ちた不燃剤8は幹4に形成している複数の導管に沿って吸上げられることで、幹4のほぼ全域に行きわたらせる。【選択図】 図1
