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Impact of Ga3 and Naa on Horticultural Traits of Abelmoschus Esculentus

H. Mehraj
The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarami, Matsumaya, Ehime 790-8556, Japan

T. Taufique
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

M.R. Ali
Scientific Officer
Olericulture Division, HRC, BARI, Joydevpur, Gazipur, Dhaka, Bangladesh

R.K. Sikder
Horticulture Development Division, BADC, Dhaka-1000, Bangladesh

A.F.M. Jamal Uddin
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

To increase growth and yield of okra, an experiment was conducted in Sher-e-Bangla Agricultural University, Bangladesh using some growth hormones. It was used BARI Dherosh 1 as genetic materials and some growth regulators viz. G₀: Control (fresh water); G₁: GA₃(Gibberellic acid) and G₂: NAA (Naphthalene acetic acid) @ 50 ppm. Tallest plant (89.0 cm), longest petiole (29.0 cm), number of leaves (49.0/plant), leaf area (29.7 cm²), number of branches (5.5/plant), fresh weight (84.5 g/plant), dry weight (10.9 g/plant), number of pods (33.4/plant), pod length (17.5 cm), pod diameter (1.7 cm) and yield (338.1 g/plant, 2.9 kg/plot and 16.4 t/ha) was found from G₁ which was statistically identical with G₂, while minimum from G₀. GA₃ and NAA have the potentiality to increase the yield of okra, but GA₃ was found to be most effective in the present study.

Keywords: Okra, PGR, growth and yield

Location: Horticulture farm, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Start Date: 00-04-2013

End Date: 00-09-2013

Program Area: Crop-Soil-Water Management

Commodity: Okra

Objectives:

To find out effect of GA₃and NAA on performance of okra (BARI Dherosh 1)

Methodology:

An Experiment was carried out in the Horticulture Farm, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh to find out the performance of okra (BARI Dherosh 1) during April to September 2013. Three levels of growth regulators viz. G₀: Control (fresh water); G₁ : GA₃ (Gibberellic acid) and G₂ : NAA (Naphthalene acetic acid) @ 50 ppm in Randomized Complete Block Design with three replications. The unit area of each plot was 1.5 m × 1.2 m. Seeds were sown in plots with maintaining distance between row to row and plant to plant was 40 cm and 50 cm, respectively. Cowdung @ 10t/ha, urea 120 @ 90 kg/ha, Triple super phosphate (TSP) @ 90 kg/ha and Muriate of Potash (MP) @ 150kg/ha were used, respectively as basal dose. Five plants were randomly selected from each unit plot for the collection of data. Data were collected on plant height, stem diameter, number of leaves/plant, number of branches/plant, length of petiole, number of internodes/plant, length of internode, leaf area, fresh weight of plant, dry matter of plant, days to 50% flowering, number of flowers buds/plant, number of pods/plant, length of pod, diameter of pod, yield/plant, yield/plot After harvesting, 150 g plant sample (above ground) previously sliced into very thin pieces were put into envelop and placed in oven maintained at 70 C for 72 hours. The sample was then transferred into desiccators differences among growth hormones at different DAS and allowed to cool down at room temperature. The final weight of the sample was taken. The dry matter contents of plant were computed by simple calculation from the weight recorded by the following formula:

% Dry matter content of plant = (Dry weight/Fresh weight) × 100

Collected data were analyzed statistically using MSTAT-C computer package program. The significance of the difference among the treatments was estimated by Duncan’s Multiple Range Test (DMRT) at 5% level of probability.

Source of Information: World Appl. Sci. J., 33 (11): 1712-1717, (2015)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Though gibberellic acid and naphthalene acetic acid was found to be statistically similar but gibberellic acid (GA₃ ) was more effective than that of naphthalene acetic acid (NAA) in most of growth and yield contributing characters of okra. Foliar application of 50 ppm GA₃ could increase the growth and yield contributing characteristics of okra plant and ultimately incresed the yield.

Knowledge Management: Journal