<；P>；PROBLEM TO BE SOLVED: To provide a block for marine algal adhesion, intended for further promoting effective use of resources, seawater purification, and raising of ocean resources. <；P>；SOLUTION: This block 12 for marine algal adhesion has a charcoal base material 10 which is formed by heat compressing charcoal, tar, pitch, and resin component which are produced using biomass resources as the raw material, at least on a part of a fixed thickness from the surface, or at least on part of the surface. The porous structure of the charcoal base material 10 effectively functions as an adhesion surface of marine algae, has lightweight and high strength, and hardly decays. It is possible to instantly produce a biofilm on the surface by using the block in water even just after producing, and directly enable adhesion of marine algae without making an obstructive factor to an ecosystem. Furthermore, it is possible to increase and decrease necessary nutrient for growth of marine algae and adjust a buoyancy of the block 12 in seawater by controlling a ratio of constituent materials and components, and also it is possible to promote marine alga growth by using charcoal of a particle diameter according to the size of the root of a marine alga species to be raised. <；P>；COPYRIGHT: (C)2009,JPO&INPIT
