PROBLEM TO BE SOLVED: To provide a soil cover material for raising seedling for covering a surface of culture soil for raising seedling filled in a container, capable of suppressing occurrence of algae without damage to water holding capacity and water permeability even when a seedling raising period is long.SOLUTION: The soil cover material for raising seedling comprises a phosphate absorption coefficient of 1200 mg/100 g or greater, and an ammonia nitrogen of 113 mg/L or lower, in which a percentage content of vermiculite is preferably 50 volume% or greater and 90 volume% or lower in the whole body.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】容器に充填された育苗用培土の表面を覆う育苗用覆土材において、育苗期間が長い場合であっても、保水性、透水性などを損なうことなく藻類の発生を抑制可能とする。【解決手段】リン酸吸収係数が１２００ｍｇ／１００ｇ以上で、アンモニア態窒素が１１３ｍｇ／Ｌ以下とする構成とする。ここで、バーミキュライトの含有率が全体の５０容積％以上９０容積％以下であるのが好ましい。【選択図】なし
