IMPACTS OF OLIVE-MILL WASTEWATER ON THE GROWTH AND PHYSIOLOGICAL RESPONSES OF STEVIAREBAUDIANA BERTONI

摘要

In this study, it was aimed to utilize the phenolic content of Ste-via rebaudiana Bertoni with olive mill wastewater (OMWW) application in different adsorbent environments. Three different adsorbent materials were used in the main plots: perlite, zeolite and volcanic tuff and sub plots as different concentrations of olive mill wastewater (control, 25, 50, 75 and 100). Stevia seedlings will be used as one for each pot. Equal volumes (0.2 liters) of olive mill wastewater were applied for different concentrations. Under the control conditions, the same amount of tap water will be applied. Results showed that plants were found to have died at doses of 75 and 100 OMWW. On the other hand, it was observed that the OMWW doses had a negative effect on plant growth when compared to the control conditions, the 25 OMWW gave similar results to control. When these adsorbents were used in combination with OMWW, it was observed that the stress occurred and the phenolic compounds were increased. In this study, it was concluded that 25 OMWW could be applied to the zeolite medium in order to utilize the total phenolic content in the stevia plants.