THE EFFECT OF ADMINISTRATION OF GIBERELLIN ZPT ON THE GROWTH AND YIELD OF PURPLE EGGPLANT(Solanum melongena L.) VARIETY YUVITA F1

Abstract

This study aimed to assess the impact of Gibberellin Plant Growth Regulator (PGR) on the growth and yield of purple eggplants (variety: Yuvita F1). Conducted from January to March 2022 in Loa Duri Ulu Village, Loa Janan District, Kutai Kartanegara Regency, the experiment followed a Randomized Complete Block Design (RCBD) with four different Gibberellin concentration treatments: p0 (0.00 mL gibberellin L-1, control), p1 (0.15 mL gibberellin L-1), p2 (0.30 mL gibberellin L-1), and p3 (0.45 mL gibberellin L-1), each with 10 replications. Statistical analysis included variance followed by the Least Significant Difference (LSD) test at a 5% significance level.The results highlighted that the p2 treatment (0.30 mL gibberellin L-1) exhibited a significant positive impact, promoting the optimal growth and yield of purple eggplants. Specifically, this treatment led to a 14.51 cm increase in plant height (15.92% improvement compared to the control), 3.60 additional branches (38.88% increase compared to the control), a 40.10 HSPT reduction in flowering age (-3.10% compared to the control), a 19.13 cm increase in fruit length (17.61% compared to the control), 6.90 more fruits per plant (24.63% compared to the control), and a 0.44 kg increase in fresh fruit weight per plant (22.72% compared to the control).