| 摘要 |
PURPOSE:To provide the subject device capable of readily and precisely controlling the quality of a water culture solution including the concentration of a liquid fertilizer in the water culture solution and capable of feeding the water culture solution in an on-line style by connecting a cultivation tank to a specific structure water cultivation feed device in a communicating state. CONSTITUTION:The objective device is characterized by communicating and connecting a cultivation tank A with a water cultivation solution feed device B in which many semi-permeable tubes 4 for passing a liquid fertilizer (b) are received and disposed in a tank 3 for passing water C, whereby the liquid fertilizer (b) and water (c) are mixed with each other through the semi-permeable tubes 4 to provide a water cultivation solution having a desired liquid fertilizer concentration and the water cultivation solution can be fed into the cultivation tank A from a tank 3 in an on-line style. |
