<；P>；PROBLEM TO BE SOLVED: To provide a small-sized porous substrate allowing a fisherman or an ordinary person to easily transport with a fishing boat to a place including adhesion requirements such as depth of water, illumination and wave strike in a mature stage of seaweed so as to perform substrate construction in the water, enabling secure adhesion and growing of embryo, gametophyte and sporophyte, and enabling creation of a seaweed bed by transferring to a desired place after adhesion and growing of embryo, gametophyte and sporophyte. <；P>；SOLUTION: This small-sized porous substrate 1 includes a porous block body 5 formed by fixing an aggregate 2 and concrete mortar 3 to each other with a bonding material 4 such as an iron fiber, a synthetic fiber, and a natural material fiber, piling the product in an almost pyramidal shape, and forming an external surface in an uneven form so as to have water permeability. The porous block body 5 has a hollow part 6 opening toward a bottom side, and is piled on bottom metal fittings 7. Handles 8 are attached to the sides of the bottom metal fittings 7, and a connection metal fitting 9 whose both ends project to the outside of the bottom metal fittings 7 is fixed on the lower surface of the bottom metal fittings 7. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
