PROBLEM TO BE SOLVED: To provide a nursery container which has the optimal water permeability for growing plants, has slow biodegradability and excellent shape stability, when raising seedlings, is quickly biologically degraded in soil not to inhibit the growth of the plants, after transplanted in culture soil or a field, can control the biodegradability, can save labors and cost for removing and scraping the nursery container, when the plant seeding is transplanted, and little gives the loads of wastes to environments, and to provide a method for effectively producing the nursery container at a low cost.SOLUTION: This nursery container formed from a biodegradable thermoplastic resin and natural fibers and having a bottom portion and a side portion is characterized in that the average thickness of the bottom portion is in a range of 0.5 to 5.0 mm and the coefficient of water permeability of the bottom portion is in a range of 1.0×10-3 to 1.0×102 cm/s.COPYRIGHT: (C)2006,JPO&NCIPI【課題】 植物の育成に最適な透水性を有し、育苗時は生分解が遅く形態安定性に優れるが、培土やほ場への移植後は土中で速やかに生分解し植物の生育を阻害しないように生分解性をコントロールできるため、植物の苗を移植する際に育苗容器の除去、廃棄する手間やコストが省け、廃棄物による環境負荷がない育苗容器と更にその効果的でかつ安価な製造方法を提供すること。【解決手段】生分解性を有する熱可塑性樹脂と天然繊維とから形成され、底部および側部を有する育苗容器であって、底部の平均厚さが0.5~5.0mmの範囲内で、かつ底部の透水係数が1.0×10-3~1.0×102 cm/sの範囲内であることを特徴とする育苗容器。【選択図】なし
