PROBLEM TO BE SOLVED: To provide a plant cultivation system which can suppress reduction in a ratio of heat quantity which can be recovered with respect to heat quantity generated in a gas turbine or the like.SOLUTION: A plant cultivation system comprises: a power generator 1 which uses an internal combustion engine as a power source； an exhaust heat recovery device 2 which recovers heat from exhaust gas generated in the power generator 1； and a denitrification device 10 which removes nitrogen oxide in the exhaust gas, in which the system supplies carbon dioxide contained in exhaust gas to plants to raise the plants. The exhaust gas is supplied from the exhaust heat recovery device 2 to the plants via the denitrification device 10, the denitrification device 10 is a dry absorbent formed by impregnating KOH into a base material made of gypsum and active carbon powder, and the denitrification device 10 has a dilution chamber 7 as condensation suppressing means for suppressing internal condensation.SELECTED DRAWING: Figure 1【課題】ガスタービン等での発生熱量に対し、回収できる熱量の割合が低くなるのを抑制できる植物栽培システムを提供する。【解決手段】内燃機関を動力源とする発電機１と、この発電機１で発生する排気ガスから熱を回収する排熱回収装置２と、排気ガス中の窒素酸化物を除去する脱硝装置１０とを備え、排気ガス中に含まれる二酸化炭素を植物へ供給し、植物の育成を行う植物栽培システムであって、排気ガスは、排熱回収装置２から脱硝装置１０を経て植物へ供給され、脱硝装置１０は石膏および活性炭粉末からなる基材にＫＯＨを含浸させてなる乾式吸収剤であり、脱硝装置１０は内部での結露を抑制する結露抑制手段として希釈チャンバー７を有する。【選択図】図１
