| 摘要 |
PURPOSE:To maintain the balance of ingredients required for growth of plants by supplying the decrease in amount of a culture solution in a culture solution tank with additional feed of the culture solution, simultaneously regulating the rate of added culture solution to a larger amount by a prescribed factor based on the total amount of transpiration of the culture solution per day and carrying out the additional feed once at an interval of one or two days. CONSTITUTION:A culture solution in a culture solution tank containing the culture solution for cultivating plants is circulated so as to pass from the tank through a plant cultivating part and then return to the aforementioned tank. The culture solution decreased with the plant growth is supplied once at an interval of one or two days by adding the culture solution in an amount of 1.5-2.0 times based on the total amount of transpiration of the culture solution per day in the plant cultivating part. |
