To provide seedling protective covers which can keep a cylindrical shape without causing a crack even if they are curved or bent into a cylindrical shape, such as a column or a polygonal column.SOLUTION: A seedling protective cover 1 is composed of a biodegradable resin sheet which contains a biodegradable resin, an ultraviolet absorber, and a light stabilizer, and which can be curved or bent, being characterized by containing 20 to 70% by weight of polylactic acid and 30 to 80% by weight of biodegradable resins other than the polylactic acid, with respect to 100% by weight of a resin component.SELECTED DRAWING: Figure 2【課題】円柱や多角柱などの筒状に湾曲、又は折り曲げても、割れを生じることがなく、筒体の形状を保持できる苗木保護カバーを提供する。【解決手段】苗木保護カバー１は、生分解性樹脂、紫外線吸収剤、及び光安定剤を含む湾曲或いは折り曲げ可能な生分解性樹脂シートからなり、樹脂成分１００重量％に対し、ポリ乳酸が２０～７０重量％、ポリ乳酸以外の生分解性樹脂が３０～８０重量％含有してなることを特徴とする。【選択図】図２
