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Effects of Plant Growth Regulator on Yield and Economic Benefit of Sweet Pepper (capsicum Annum L.)

S. Akhter
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, 1207

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

K. Khatun
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, 1207

F. Akhter
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, 1207

A. Parvin
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, 1207

Abstract/ Executive Summary:

The experiment was conducted in the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. Plant growth regulators were applied which had significant effect on yield of sweet pepper (Capsicum annum L.). The experiment consisted of two factors. Factor A: Plant growth regulators (four levels) as G₀: Control, G₁: Gibberellic Acid (GA₃) @ 30 ppm, G₂: 4-Chloro Phenoxy Acetic Acid (4-CPA) @ 45 ppm and G₃: 4-Chloro Phenoxy Acetic Acid (4-CPA) @ 45 ppm + Gibberellic Acid (GA₃) @ 30 ppm and Factor B: Number of spray (three levels) as N₀: Control (no spray), N₁: two spray, N_2: three spray. In case of plant growth regulators, the highest yield (27.77 t/ha) was found from G₃ treatment, whereas the lowest (18.87 t/ha) was from G₀ treatment. For number of spray the maximum yield (26.0 t/ha) was recorded from N₂ treatment, while the minimum yield (19.87 t/ha) was from N₀ treatment. The results indicated that the highest yield (31.8 t/ha) was observed from G₃N₂ treatment combination, while the lowest yield (17.5 t/ha) was from G₀N₀ treatment combination. Due to combined effect, the highest yield (31.8 t/ha) with net income (Tk/ha 1416558) and BCR (2.46) was observed from G₃N₂ treatment combination, while the lowest yield (17.5 t/ha) with net income (Tk/ha 433045) and BCR (1.49) from G₀N₀ treatment combination. Thus, three times spray with (4- Chloro Phenoxy Acetic Acid + Gibberellic Acid) may be recommended for achieving the higher growth, yield and economic benefit of sweet pepper.

Keywords: Sweet pepper, Plant growth regulators, Gibberellic Acid

Location: Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Start Date: 00-11-2016

End Date: 00-03-2017

Program Area: Crop-Soil-Water Management

Commodity: Sweet Pepper, Hormone

Objectives:

To find out the optimum concentration and the suitable combination of growth regulators and their number of spray for maximizing the yield of sweet pepper in Bangladesh.

Methodology:

The experiment was carried out at the horticulture farm, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November 2016 to March 2017. The location of the experimental site was at 23.41°N latitude and 90.22° longitude with an elevation of 8.24 m from sea level. Soil was having the texture of sandy loam with p^H 5.6. Seeds of sweet pepper variety viz KS 2201 (Krishibid seed) was used as experimental material. The experiment was laid out in Randomized Complete Block Design with three replications. Factor- A had four levels of plant growth regulators viz. G_0- control, G₁-GA₃ at 30 ppm, G₂-4-CPA at 45 ppm, G₃-4-CPA @ 45 ppm + GA₃ @ 30 ppm and Factor- B had three levels of number of spray viz. N₀-control (no spray), N₁- Two spray (vegetative+early flowering stage), N₂-three spray (vegetative+early flowering+80% flowering stage). Seeds were sown in the seedbed on 5 November 2016. The soil of the experimental plot was treated with savin 50WP at 5 kg per ha to protect the young plants from the invasion of ants and cutworm. The size of the each plot was 1.5×1.2 m with 36 plots. About 25 days old seedlings were transplanted into the prepared plot on 1 December 2016 with plant to plant spacing 50×30 cm. Fertilizers were applied at 250, 330, 250, 110 and 10 ton per ha for urea, TSP, MP, gypsum, and cow dung, respectively according to BARI (2011). Harvesting of fruits was done by hand picking.

Source of Information: The Agriculturists 16(2): 58-64 (2018)

Article Link (Online Journal): DOI: http://dx.doi.org/ 10.3329/agric.v16i02.40343

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the results of this experiment, it may be concluded that the plant growth regulators (4- CPA @ 45 ppm + GA₃ @ 30 ppm ) and three sprays would give better performance than others. However, the experiment should be carried out with more variables in different AEZs to reconfirm the recommendation.

Knowledge Management: Journal