PROBLEM TO BE SOLVED: To provide a particulate plant cultivation material which has both high cation-exchange ability and high anion-exchange ability and has excellent fertilizer retentivity, and which has excellent air permeability and returns to a highly air-permeable state in a short time even when retained in water in a saturation state.SOLUTION: The present invention relates to a particulate plant cultivation material which is composed of an alginic acid gel and has a particle diameter of 0.2 to 6 mm, a cation exchange capacity of 5 meq/100 mL or more and an anion exchange capacity of 5 meq/100 mL or more.COPYRIGHT: (C)2014,JPO&INPIT【課題】本発明によれば、高い陽イオン交換能および陰イオン交換能の両方を有する優れた保肥性および飽和状態に保水させた場合でも短時間で高通気性状態に戻る優れた通気性を有する粒状植物育成体を提供する。【解決手段】本発明は、粒径0.2~6mm、陽イオン交換容量5meq/100mL以上および陰イオン交換容量5meq/100mL以上を有することを特徴とするアルギン酸ゲルから成る粒状植物育成体に関する。【選択図】なし
