| 摘要 |
PURPOSE:To make operability to be excellent by providing a layer of many floating particles covering the surface of water-culturing solution with floating on the surface of the water-culturing solution and having specific gravity smaller than the water-culturing solution in a water-culturing tank storing water- culturing solution and containing arranged culturing plants. CONSTITUTION:Water-culturing solution S is stored and culturing plants P are arranged in a water-culturing tank 1. Then, a floating particles layer 2 composed of many floating particles having specific gravity smaller than the water-culturing solution S is made to float on the surface of the water-culturing solution S so as to cover the surface of the water-culturing solution S. As a result, culturing labors such as change of arrangement of cultured plant are saved and the water-culturing solution is kept in a state comfortable to the cultured plant. |
