Sand Stone And Artificial Reefs Filled With Slow-Release Fertilizer

摘要

The present invention relates to sandstone and artificial reefs filled with a slow-release fertilizer, wherein sandstone or artificial reefs are perforated to a certain size, filled with a slow-release fertilizer, and elutes the fertilizer over a long period of time. The present invention provides artificial reefs using concrete, sand, soil, rock, clay, elvan stone or mica as a raw material, wherein a plurality of perforated holes are formed on the surface of the artificial reefs, and the perforated holes are filled with a slow-release fertilizer.