PROBLEM TO BE SOLVED: To provide a carbon dioxide supply system capable of evenly supplying carbon dioxide in the vicinity of each plant in a plant cultivation space to promote photosynthesis.SOLUTION: A carbon dioxide supply system (10) is provided with: a fine air bubble generator (20) for generating fine air bubble containing water, which contains fine air bubbles of carbon dioxide, by decompressing carbon dioxide dissolved water into which carbon dioxide is pressurize and dissolved and a water channel (30) which is connected to the fine air bubbles generator (20) to allow the fine air bubble containing water to flow in an array direction of plants in a cultivation space (S), configured such that a space above the flowing fine air bubble containing water is connected to the vicinity of each plant in the cultivation space (S).COPYRIGHT: (C)2014,JPO&INPIT【課題】植物栽培空間の各植物の近傍に二酸化炭素を光合成が促進されるように満遍なく供給可能な二酸化炭素供給システムを提供する。【解決手段】二酸化炭素供給システム(10)には、二酸化炭素が水中に加圧溶解された二酸化炭素溶解水を減圧することによって二酸化炭素の微細気泡が含まれた微細気泡含有水を生成する微細気泡発生装置(20)と、該微細気泡発生装置(20)に接続されて上記微細気泡含有水を栽培空間(S)の植物の配列方向に流動させると共に、流動する上記微細気泡含有水の上方の空間と栽培空間(S)の各植物の近傍とが連通するように構成された水路(30)とが設けられている。【選択図】図1
