تأثير التغذية الورقية بالمخصب الحيوي EM1 ومستخلص الطحالب البحرية Amino Food في نسبة العقد وبعض الصفات الفزيائية والكيميائية لثمار البرتقال اليافاوي.

Abstract

The study was conducted in Lattakia Governorate in a private orchard in the village of Damsarkho during the 2023 season on "Palestine Jaffa" orange trees grafted on bitter orange rootstock, with the aim of studying the effect of foliar spraying with the biofertilizer EM1 and the seaweed extract Amino food, individually and jointly, on the percentage of fruit set and some physical and chemical characteristics of the fruits. The experiment was designed according to a completely randomized design; it included nine treatments and three replicates. The results showed that foliar feeding with the biofertilizer EM1 and the seaweed extract Amino food, either individually or jointly, led to significant differences in all studied characteristics compared to the control. The treatment of joint spraying with the biofertilizer and the seaweed extract at a concentration of 3 ml/L each gave the highest values ​​in terms of the percentage of set, the longitudinal and transverse diameter of the fruit, the weight and size of the fruit and the percentage of juice;  Where they recorded, respectively: 72.07% 9.06 cm, 10.26 cm, 307 g, 337.2 cm3, 44.06%, and The results of the statistical analysis showed the superiority of the ninth treatment (EM1 3 cm³/liter + Amino food 3 cm³/liter) over the rest of the other treatments, including the control. The same treatment also significantly outperformed in terms of the percentage of total soluble solids, and vitamin C content, reaching 13.3%, 46.5 mg/100 ml juice, respectively, while the thickness of the fruit peel and fruit acidity decreased in all spray treatments compared to the control, which recorded the highest values ​​for these two characteristics (5.9 mm, 1.41%), respectively.