Nutrient Solution Prepared with Ozonated Water does not Damage Early Growth of Hydroponically Grown Tomatoes

Ozonated water as a water source for nutrient solution was investigated in hydroponically grown tomatoes. Nutrient solution was prepared by diluting concentrated nutrient solutions with ozonated water with dissolved ozone (DO3) concentrations of 0 to 10 mg L−1. Manganese concentration in the nutrient solution decreased with increasing DO3 concentrations. Initial growth of tomato plants supplied with nutrient solution prepared with ozonated water with a DO3 concentration of 1.5 mg L−1 was greater than that with a DO3 concentration of 0 mg L−1. These results indicate that ozonated water can be used as a disinfectant for source water in hydroponics during the early growth stage of tomatoes.