أثر استخدام نوعين من مستخلصات الطحالب البحرية في نمو وإنتاج نبات الخيار في الزراعة المحمية

Abstract

The study was conducted in the village of Hmeimim, in the Jableh district of Lattakia Governorate, within an unheated plastic hall, during the 2023 agricultural season, to study the effect of some seaweed extracts on the vegetative and floral growth of cucumbers. The experiment was conducted on the hybrid cucumber plant "Romano F1". Two types of marine algae extracts (Marine) and (Grental) were used in the study. The study included 5 treatments as follows: T0: Control plants, T1: Plants sprayed with (Marine) extract at a rate of 1.50 ml/L, T2: Plants sprayed with (Grental) extract at a rate of 1.50 ml/L, T3: Plants to which marine algae extract (Marine) was added on the ground at a concentration of 1.50 ml/L, T4: Plants to which marine algae extract (Grental) was added on the ground at a concentration of 1.50 ml/L, and 4 replicates for each treatment and 10 plants in each treatment, so the number of plants in the experiment became 200 plants according to the complete randomized block design. The results showed that the use of these extracts in general had positive effects in all studied indicators compared to the control, and the foliar spray treatments with extracts of (Marine) and (Grental) had outperformed the soil fertilization treatments and the control in all studied indicators. Treatments T1 and T2 achieved an increase in plant height (344.30 and 338.90 cm, respectively) and an increase in the number of leaves formed per plant (53.63 and 51.31 leaves/plant), with significant differences compared to the other treatments. They also achieved the highest leaf surface area (19,191.82 and 18,814.54 cm2/plant). Regarding floral indicators, treatment T2 also produced the highest number of female flowers, followed by treatment T1. The highest number of fruits was also achieved (49.64 and 48.48 fruits/plant, respectively). In the same context, the two previous treatments outperformed all other treatments, with significant differences in fruit weight, plant yield, and unit area productivity. We conclude from the previous results that it is a good idea to use seaweed extracts on "Romano F1" cucumber plants to improve and increase vegetative and floral growth indicators.