Impact Factor (2025): 6.9
DOI Prefix: 10.47001/IRJIET
The effect of supplementary summer and spring irrigation on
the productivity of the olive tree (Sourani variety) was studied. The study was
conducted in the village of Kfar Rouhin, located in Sahel Al-Rouj, west of
Idlib, during the years 2012-2013. In this research, we adopted the design of
the complete random sectors and conducted 5 transactions, and in each
treatment, we had five replicates and each repeater was an olive tree. During
the experiment, supplementary irrigation was applied so that the transactions
differed between them by the number of irrigations (0, 1, 2, 3, and 4
irrigations) and their dates (April; April and June; April, June, and July;
April, June, July, and August). The results showed that the treatment of spring
irrigation (one irrigation in April) was significantly higher than the other
irrigation treatments in most studied growth and flowering indicators. This
treatment achieved an increase in the vegetative growth (5.6 cm), in the foliar
surface (2.59 cm2), in a number of flowering clusters/branch
(13.96), in the number of flowers/flowering clusters (8.08), in the number of
flowers/branch (358.33), in the fruits-set percentage (0.72%), and in the
number of fruits/branch (25.05), compared to the control. The results also
showed that the summer irrigation treatment (irrigation in April, June, July,
and August) achieved a significant increase in the fruiting and productivity
criteria: fruit weight (2.86 g), fruit size (2.65 mL), pulp/fruit ratio
(7.92%), the productivity per tree (57.98 kg), oil percentage (10.33%) as
compared to the control. Finally, the results showed the superiority of the
first year of the study 2012 over the second year 2013 in the indicators of the
number of flowering clusters/branch, the number of flowers/flowering cluster,
the number of flowers/branch, the number of fruits/branch, and the productivity
per tree. While the second year of the study exceeded in the rest of the
studied indicators. Thus, the phenomenon of alternate bearing, by which the
olive trees are characterized, had a clear effect, but all experimental
treatments reduced the difference in all studied indicators compared with the
control.
Country : Syria