| 摘要 |
<p>An insert 16 of a water-permeable material such as brick, stone, wood, or a porous plastics material, is used in a subirrigation system for plants to control the rate of flow of water through a hollow member 12 which is packed with a water-permeable material such as sand, gravel, cultivation medium or a fibrous material, and which connects a reservoir 7 with the cultivation medium 6 to be irrigated. <IMAGE></p> |
