蔬菜水培营养液电导率EC值与其配方浓度剂量成直线相关，通过测定电导率，运用回归方程可求得该营养液浓度剂量和调整补充营养液的量。 The EC value of vegetable hydroponic nutrient solution is linearly related to the dose of its formula concentration. By measuring the conductivity and using regression equation, the concentration of nutrient solution and the amount of supplement nutrient solution can be calculated.