PROBLEM TO BE SOLVED: To increase the content of a useful antioxidant substance in a plant body, promote higher production efficiency of a specific substance in the plant body, and/or realize growth promotion and increase in harvest of the plant in indoor cultivation such as a greenhouse and a general plant factory particularly in hydroponics in facility or the like.SOLUTION: In hydroponics facility, the content of a useful antioxidant substance in a plant body is increased by allowing the plant body to directly absorb hydrogen peroxide solution within an appropriate concentration range, and/or growth of the plant body is promoted and harvest of the plant is increased.COPYRIGHT: (C)2014,JPO&INPIT【課題】温室等施設栽培や一般的な植物工場など、特に施設等での水耕栽培において、植物体中の有用な抗酸化物質の含有量を増加させ、植物体内での特定物質の産生高効率化を促し、かつ/又は、その生育促進・増収化を実現する。【解決手段】水耕栽培施設において、過酸化水素水を適切な濃度範囲で植物体に直接に吸収させることにより、植物体中の有用な抗酸化物質の含有量を増加させ、かつ/又はその植物体の生育を促進・増収化する。【選択図】なし
