Plant cultivation system and a method for plant cultivation

A method for cultivating a plant, which comprises:

• (1) providing a plant cultivation system comprising:
• a biaxially oriented PVA film for cultivating a plant thereon, and
• a nutrient fluid retaining means disposed to be in contact with a lower surface of the PVA film,
• wherein said PVA film has an equilibrium degree of swelling in a range of from 125 to 200% as measured in water at 30° C., the storage elastic modulus (G′) of the PVA film as measured in an equilibrium swollen state in water at 30° C. being in the range 10,000 to 80,000 Pa and the loss elastic modulus (G″) of the PVA film as measured in an equilibrium swollen state in water at 30° C. being in the range 300 to 8,000 Pa, and
• wherein said PVA film has a loss tangent (tan δ) in a range of from 0.01 to 0.1 as measured in an equilibrium swollen state in water at 30° C., said loss tangent (tan δ) being defined as the ratio of loss elastic modulus (G″) to storage elastic modulus (G′),
• (2) placing a plant on the PVA film of said plant cultivation system, and
• (3) causing a nutrient fluid to be in contact with the plant through said PVA film, thereby cultivating the plant on the PVA film.