Rana Kasem* (1), Mazen Nassour(2) and Sawsan Haifa(3 )
(1). Directorate of Technical Services, Tishreen University, Lattakia, Syria.
(2). Department of Horticulture, Faculty of Agriculture, Tishreen University, Lattakia, Syria.
(3). Department of soil and water science, Faculty of Agriculture, Tishreen University, Lattakia, Syria.
(*Corresponding author. Rana Samih Kasem . E-Mail: ranakasem1@gmail.com)
Received:9/05/2022 Accepted: 1/09/2022
Abstract:
A field experiment was conducted to evaluate the influence of adding treated organic residues (olive mill wastewater- OMW, sewage sludge -SS and biochar- B) on growth, flowering, corm and essential oil production of (Freesia hybrida. cv. yellow freesia old fashion) and grown in calcareous soil, in Lattakia, during the seasons 2018-2019 and 2019-2020. The experiment was laid out in a complete random blocks design (C.B.D) included 9 treatments with 3 replications: (T1: Control, T2: mineral and organic fertilization of: (30:20:20) g\m2 NPK + 2 Kg\m2 of cow manure, T3: adding 7 l\ m2 of olive mill wastewater, T4: adding sewage sludge 2.5 kg\m2, T5: adding 2 kg\m2 of Biochar:, T6: adding (3.5 l\m2 of olive mill wastewater + 1.25 kg\ m2 of sewage sludge), T7: adding ( 2 kg\ m2 of Biochar + 1.25 kg\ m2 of sewage sludge), T8: adding ( 2 kg\ m2 of Biochar+ 3.5 l\ m2 of olive mill wastewater), T9: adding (2 kg\ m2 of biochar+ 3.5 l\ m2 of olive mill wastewater+ 1.25 kg\ m2 of sewage sludge). Results showed that most fertilization treatments (T2, T3, T4, T6, T7, T8, T9) were significantly superior to both control (T1) and Biochar (T5) treatments which recorded the lowest values of EOS quantity (0.0274 and 0.0299 %) in order. Results also showed differences in the essential oil composition due to the type of organic addition. The highest ratio for linalool compound, which is the main compound in Freesia’s essential oil, was recorded in sewage sludge treatment (T4) (39.85%) and mineral and organic treatment (T2) (39.23 %) with no significant differences between these two and both were significantly superior to all other studied treatments. Significantly good results were recorded in (T9: Biochar+ Olive mill wastewater+ sewage sludge) for linalool and other essential oil components. Treatment T6 (Olive mill wastewater+ sewage sludge Fertilization) led to an increase of the proportion of phenolic compound (Phenol, 2,6-bis(1,1-dimethylethyl) -4-ethyl). Whereas the proportion of carboxylic acid (n-Hexadecanoic acid) increased to (18.41%) in olive mill wastewater treatment (T3). Biochar addition (T5) achieved close results to control (T1) for both yield and quality of essential oil.
Keywords: Freesia, Organic fertilization, Olive mill wastewater, Sewage sludge, Biochar, Essential oil, Linalool.
Full paper in Arabic: pdf