Influence of Organic Nutrient and Exogenous Fruit Set Regulator on Floral Development and Yield Performance of Broad Bean

• Safa D. M. AL-Tabatabaee1 and Mohammed Zedan Khalaf Al-Mharib2*

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This study evaluated the effects of integrated fertilization and fruit-set regulator spraying on the floral traits and green pod yield of broad bean (Claro de luna). A factorial experiment was arranged in a randomized complete block design with three replications. The first factor consisted of five soil fertilization treatments: 25% of the recommended chemical fertilization (A1); 100% of the recommended chemical fertilization (A2); Karmino Bloom at 3, 4, and 5 L ha⁻¹, each combined with 25% of the recommended NPK fertilization (A3, A4, and A5, respectively). The second factor consisted of ORASET-X spray at 0, 0.3, and 0.6 g L⁻¹ (E0, E1, and E2). The combined treatment A5E2 significantly improved floral and yield traits, recording the shortest period to 50% flowering (49.33 days), the highest fruit set (28.65%), pollen viability (91.84%), number of pods per plant (29.02), and early green pod yield (11.02 t ha⁻¹). It was statistically comparable with A2E2 for fresh pod weight (30.65 g), yield per plant (889.50 g), and total green pod yield (39.53 t ha⁻¹). These results indicate that Karmino Bloom at 5 L ha⁻¹ combined with 25% of the recommended NPK and ORASET-X at 0.6 g L⁻¹ can enhance broad bean productivity while reducing mineral fertilizer input.

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