The application of response surface method in producing water spinach (Ipomoea reptans Poir) through hydroponics technique with iron-electrode electrolyzed water

This study aimed to determine the influence of Electrolyzed water on the growth of water spinach viewed from the dry weight, plant height, number of leaves, and stem circumferences factors. This research had been conducted using a hydroponic technique with iron-electrode electrolysis water as the treatment. The method used was regression analysis, both linear and quadratic. The optimizations of the treatments were seen using the surface response method. The results showed a significant effect on the length of electrolysis duration on dry weight, the number of leaves, plant height, and stem circumference. The most significant models were the model with the explanatory variables of electrolysis duration and the number of leaves. This result indicated the addition of Electrolyzed water with an iron diode increased the number of leaves' stomata which affected the dry weight.