The Utilization of Tofu Waste Water as An Addition of Nutrition in Hydroponic Media to Lettuce Growth (Lactuca sativa L.)

Abstract

Lettuce is a vegetable that is easily cultivated and can be a source of essential vitamins and minerals for the body. This study aims to determine the effect of using tofu wastewater as a nutrient addition to hydroponic media on the growth of lettuce (Lactuca sativa L.). The method used in this study was an experimental method with a randomized block design (RBD) of 5 treatments and 6 repetitions. The treatments were P0 (0 ml POC + 60 ml AB mix/kontrol), P1 (20 ml POC + 40 ml AB mix), P2 (30 ml POC + 30 ml AB mix), P3 (40 ml POC + 20 ml AB mix), dan P4 (60 ml POC + 0 ml AB mix). The research data were analyzed using the normality and homogeneity tests as a prerequisite test. These were then followed by the ANAVA and LSD tests at the 5% level. The application of tofu wastewater as a nutrient addition in P2 treatment had the best results with an average plant height of 22.55 cm, wet weight of 5.73 g, and dry weight of 0.34 g. Therefore, it can be concluded that the utilization of tofu wastewater as a nutrient addition to hydroponic media affected the growth of lettuce (Lactuca sativa L.).