EFFECT OF DIFFERENT CONCENTRATION OF GIBBERELLIC ACID (GA3) ON GROWTH, YIELD AND QUALITY OF CARROT (DACUS CAROTA L. CV. NEW KURODA) IN PANDAM, ILAM

Manju Giri, Chiranjibi Puri, Bishal Shrestha, Deepa Neupane, Lilam Karki and Bindu Nepali

DOI: 10.26480/bda.01.2025.35.38

ABSTRACT
The field experiment was conducted at the Cardamom Development Centre, Ilam, to assess the effect of different concentrations of gibberellic acid (GA3) on the growth, yield, and quality of carrots. The experiment was carried out in a randomized complete block design (RCBD). There were 5 treatments, comprising T1 (control), T2 (GA3 @ 50 ppm), T3 (GA3 @ 100 ppm), T4 (GA3 @ 150 ppm), and T5 (GA3 @ 200 ppm), which were replicated four times. Gibberellic Acid significantly impacts growth, yield, and quality parameters, with significant effects on plant height, leaf number, leaf length, root diameter, economical yield, biological yield, and total soluble solid (TSS) among different treatments. Application of 150 ppm GA3 found highest plant height (72.05 cm), number of leaves (11.11), leaf length (71.5 cm), and leaf breadth (39.35 cm), and minimum plant height (56.92 cm), number of leaves (9.15), leaf length (56.35 cm), and leaf breadth (35.20 cm) at control. The maximum root length (23.95 cm), maximum root diameter (13.17 cm), maximum economical yield per plant (169.25 g), maximum economical yield per hectare (42.31 tons), maximum biological yield/plant (247 gm), maximum biological yield/hectare (61.75 tons) was found in the application of 150 ppm GA3 and the minimum root length (19.85 cm), minimum root diameter (11.35cm), minimum economical yield per plant (104.25 g), minimum economical yield per hectare (26.06 tons), minimum biological yield/plant (177.25 gm), minimum biological yield/hectare (44.31 tons). The maximum TSS of carrot was recorded in GA3 @150 ppm (5.80 °Brix) and minimum at 100ppm (4.95°Brix). The GA3 @150 ppm treatment in Nepal’s Ilam condition showed superior growth, yield, and quality attributes compared to other treatments.

KEYWORDS
Carrot, Gibberellic Acid, Growth, Yield