To solve a problem that, when the bottom surface of a polyvinyl alcohol (PVA)-basecl film is brought into contact with a nourishing solution and a plant is cultivatecl on the film over a long period of time, the plant's roots penetrate through the film. [Solution] A system for plant cultivation and a plant cultivation method, characterized in that the PVA-based film has an equilibrium swelling degree in water (at 30°C) of 125-250% inclusive and a loss tangent (tanδ) in an equilibrium swelling state in water (at 30°C) of 0.005-0.2 inclusive. (lndustrial applicability] The system and method according to the present invention, which enable plant cultivation over a long period of time while protecting the plant from infection with microorganisms etc. inducing plant diseases, can be used in the fields of agriculture and pharmaceutical industry.
