PROBLEM TO BE SOLVED: To provide a growth promotion method of a plant that can reduce a cultivation cost, and can accelerate the growth of a plant.SOLUTION: The growth promotion method of a plant is characterized as follows. Seeds of a plant are sowed, the exposure to NO2 is begun within 14 days at latest after the seeding, is stopped by seven days before the harvesting at latest. In addition, the period of exposure to NO2 is continued at least seven days and at most 28 days. The exposure to NO2 is performed only for an early period after seeding, thereby a growth cost can be reduced. Moreover, the exposure to NO2 is performed at a beginning stage of the growth of a plant, thereby the growth of a plant after that can be promoted, and thereby the equivalent growth with the growth of a plant always under an atmosphere of NO2 after the seeding can be promoted.COPYRIGHT: (C)2013,JPO&INPIT【課題】植物の栽培コストを低減でき、植物の生育を早めることが可能な植物の生育促進方法を提供する。【解決手段】植物の生育促進方法は、植物の種子を播き、NO2の暴露を播種後遅くとも14日以内に開始するとともに、遅くとも収穫の7日前までに停止する。そして、NO2の暴露期間が継続して7日以上28日以下である。播種後の初期の期間にのみNO2を暴露することから、生育コストの低減が可能である。また、植物の生育の初期にNO2暴露を行うことで、その後の植物の生育も促進されるので、播種後から常時NO2雰囲気下で植物を生育させるのとほぼ同等の生育の促進が可能である。【選択図】図4
