seedling manner and seedling vessel null of the seaweeds which utilize the super stiff-consistency concrete

摘要

PURPOSE: To provide a raising seedling method and apparatus for sea algae utilizing ultra-stiff consistency concrete by placing a raising seedling apparatus made of ultra-stiff consistency concrete and placed in a water tank and allowing spares or planospores of sea algae such as algae and seaweeds to make adhere and grow in a space of the raising seedling apparatus. ;CONSTITUTION: A raising seedling apparatus 2 composed of plates made of ultra-stiff consistency concrete, having a prescribed shape and containing interconnected spaces is placed in a prescribed water tank 1 and seawater is passed through the water tank 1 through an inlet port 3 at a constant flow rate. A mother seedling of sea algae is fixed to a part near the inlet port 3 to effect the dispersion of the spores of the mother seedling with the seawater flowing into the tank. The dispersed spores are attached to and grown on the surface of the space in the plate 2 of ultra-stiff consistency concrete. The plate 2 of ultra-stiff consistency concrete is produced by adding 75-80wt.% of granular aggregate such as limestone or quartzite crushed to prescribed mesh, 0-0.6wt.% of a cement setting agent and the remaining part of water to 20-25wt.% of cement and integrally forming the mixture.;COPYRIGHT: (C)1993,JPO&Japio