PROBLEM TO BE SOLVED: To effectively increase the yield and quality of cultivated crops to shorten the harvest period, save water, reduce the amount of nutrients used, and further reduce the cost. A cultivation material composition comprising a cultivation base material and a biological fiber membrane material having a three-dimensional network structure 101 in contact with the cultivation base material. [Selection diagram] Figure 1A【課題】栽培作物の産量および質を効果的に高めて収穫期間を短縮し、水を節約し、栄養源の使用量を低下させ、さらに低コスト化させること。【解決手段】栽培基材と、栽培基材に接している立体網状構造101を有する生物繊維膜材とを含む栽培材料組成物。【選択図】図1A