| 摘要 |
The present invention relates to a circulation type water culture system, which comprises a setting means for setting a watering period and nutrient solution parameters; a first memory device for storing the nutrient solution supply amount data and EC value data calculated by the set watering period and the nutrient solution parameters; a first EC measuring device for measuring the EC value of the drainage discharged from a culture bed; a second memory device for storing the EC value measured by the first EC measuring device; a nutrient solution mixing tank for mixing a nutrient solution necessary for the plant cultured in the culture bed, and storing the mixed nutrient solution; a source water supply tank for supplying source water to the mixing tank; a drainage collection tank for collecting the drainage discharged from the culture bed; a drainage storage tank for storing the drainage transferred from the drainage collection tank, and supplying the drainage to the nutrient solution mixing tank; a concentrated nutrient solution storage tank for supplying a concentrated nutrient solution to the mixing tank; and a central control device for calculating the quantity of the drainage to be supplied to the nutrient solution mixing tank from the drainage storage tank, the quantity of the source water to be supplied to the nutrient solution mixing tank from the source water tank, and the quantity of the concentrated nutrient solution to be supplied to the nutrient solution mixing tank from the concentrated nutrient solution storage tank on the basis of the supply amount data and EC value data stored in the first memory device, and the EC value stored in the second memory device. |
