PROBLEM TO BE SOLVED: To solve a problem that to conventionally perform hydroponic cultivation, there is need for a system in which nutritious liquid is circulated or oxygen can be supplied to nutritious liquid by using air bubbles, for prevention of root rot, however, use of such a system outdoors is limited, for oxygen supply in such a way requires electric power, and has to be disadvantageous in costs.SOLUTION: In the method, through a container having gas permeability, sufficient quantity of oxygen is dissolved in nutritious liquid, and further, oxygen is supplied to the nutritious liquid via a support in a process in which the support absorbs the nutritious liquid by capillary action, and furthermore, oxygen can be supplied to roots from many recesses when the roots contact with the support having capillary action. Consequently, a system does not require positive oxygen supply means, can be utilized outdoors easily, and can suppress the costs low.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】従来、水耕栽培を行うためには根腐れを防ぐために養液を循環させる、または空気バブルを使って養液に酸素供給できるシステムが必要であった。しかしながら、このような酸素供給は電力を必要とするため、屋外での利用に制限があった。また、コスト面でも高価にならざるを得ない。【解決手段】本発明ではガス透過性のある容器を介して、十分な酸素を養液内に溶け込ませ、さらに、毛細管現象により養液を吸い上げる過程でも担体を介して養液に酸素供給を行い、また、根が毛細管現象を持つ担体に接触する過程でも多数の空隙から根に酸素供給ができる。そのため、積極的な酸素供給手段が不要であり、容易に屋外での利用ができ、価格も低く抑えることができる。【選択図】図1
