PROBLEM TO BE SOLVED: To provide a medium having characteristics such as improved water retentivity and air permeability, enabling roots to absorb cations of nutriment dissolved in water in the medium easily, and facilitating the control of flexibility.SOLUTION: The medium composed of a base for the medium which is a mixed system of an assembly of thin and short fibers and soil is regulated so that (1) the content of the assembly of the thin and short fibers is 10-45 pts.wt. to 90-55 pts.wt. of soil in the mixed system of the base of the medium, and (2) soil composed of soil particles having a negative charge is included in the medium.COPYRIGHT: (C)2013,JPO&INPIT【課題】水分保持性及び空気透過性が向上し、培地中の水分に溶存の養分陽イオンの根による吸収を容易にし、柔軟性の制御が容易になる等の特徴を備える培地を提供すること、を目的とする。【解決手段】細短糸集合体と土壌との混合系が培地基材となる培地であって、(1)該培地基材の混合系が、該細短糸集合体10~45重量部に対して該土壌90~55重量部の比率にされ、(2)マイナス電荷を有する土壌粒子の土が培地に含まれること、を特徴とする。【選択図】なし
