Rana Kasem*(1) , Mazen Ali Nassour (2), and Sawsan Abdullah Haifa(3)
(1)Directorate of Technical Services, Ministry of Local Administration and Environment, 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 Kasem. E-Mail: ranakasem1@gmail.com)
Received: 29/04/2021 Accepted: 3/10/2022
Abstract:
A field experiment was conducted to evaluate the influence of treated organic residues additions (biochar (B) and treated sewage sludge (TSS)) on growth, flowering and corm production of Freesia hybrida grown in calcareous soil, at Lattakia, during the seasons 2018- 2019 and 2019- 2020. The experiment included 5 treatments: (T1: Control without any additions, T2: mineral fertilization of NPK (30:20:20) g/m2+ 2 Kg/ m2 of organic manure, T3: 2 Kg/ m2 of B, T4: 2,5 Kg/ m2 of TSS and T5: (1,25 Kg\ m2 of TSS+ 2 Kg / m2 of B). The treatment T4 achieved close results to treatment T2 with no significant differences in between of almost studied vegetative parameters (plant height, leaf number, leaf area, leaf content of total chlorophyll). No significant differences was recorded between T2 and T5 for all qualitative flowering characteristics( number of spikes plant-1, number of flowers spike-1, flower stalk’s length and diameter and flower height), while early flowering was recorded in T4 and T5 along with longer flowering duration as compared to T2. Results also showed that all fertilization treatments were superior to the control treatment T1 for all studied parameters of vegetative growth and flowering. Treatment T5 achieved the highest percentage of cormels < 1 cm in diameter (50,26%) and was significant superior to all other studied treatments.
Keywords: Freesia, sewage sludge, biochar, growth, ,bflowering, corms.
Full paper in Arabic: pdf