Comparison of boron-containing organic fertilizer and ga3 applications in red currant (Ribes rubrum l.) cultivation

Currant is a fruit that stands out with its high antioxidant content and offers many health benefits. In recent years, its cultivation areas have been increasing in our country. In this study conducted in 2024, boron-containing organic fertilizer and different doses of GA₃ (Control, 1000 ppm, 2000 ppm and 3000 ppm) were applied to the Red Lake variety. As a result of the applications, the highest fruit weight (0.42 g) was obtained in the control group. The highest fruit width was measured in the 3000 ppm GA₃ application (8.53 mm). The longest fruit length was determined in the control group (8.28 mm). The highest cluster weight (3.43 g) was recorded in the control group. The longest cluster length was recorded in the 1000 ppm Boron application (71.30 mm). The highest TEA value (9.47) and the highest results in terms of L, a and b color values were observed in the control group. In 2025 trials, it was determined that Boron and GA₃ applications had significant effects on fruit quality and yield in the Red Lake variety. The highest fruit weight was recorded as 0.40 g in the 2000 ppm Boron application, fruit width as 8.37 mm in the 2000 ppm Boron application, and fruit length as 8.38 mm in the 2000 ppm Boron application. The highest yield per plant was 350.67 g in the 3000 ppm Boron application. The highest TEA value (5.77) was found in the control group, while the highest L* (31.88) and a* (36.12) values for color parameters were found in the 3000 ppm GA₃ application, and the highest b* value was found as 15.33 in the 2000 ppm GA₃ application. In the chemical analyzes of 2024-2025, the highest total anthocyanin value was in the control group with 11.23 μg siy-3-glk/g ta, SSC 12%, pH 5.86 and 2000 ppm GA₃ application, vitamin C 24.02 mg/100 ml and 2000 ppm Boron application; total phenolic content was 164.17 μg GAE/g ta and 3000 ppm GA₃; flavonoids were 1885.67 mg RE/L and DPPH 1885.33 EC50 gave the highest values in the 1000 ppm GA₃ application.