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Yield Response of Okra to Different Sowing Time and Application of Growth Hormones

S. Dilruba
Department of Horticulture and Postharvest Technology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Mirza Hasanuzzaman
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

R. Karim
Bangladesh Agricultural Development Corporation, Pabna, Bangladesh.

Kamrun Nahar
Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Abstract/ Executive Summary:

A field experiment was conducted to evaluate the response of sowing time and hormones on growth and yield of okra at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from March to August, 2007. The experiment consisted of two factors viz. Factor-A: Three sowing time i.e . March 22, April 06 and April 21 and Factor-B: Hormones (4 treatments) i.e. Control, Alga Gold, Crop care and Ripen-15. From the results it was noticed both the fruit number and fruit yield significantly affected by sowing time and hormones. In case of sowing times, 06 April sowing produced the height yield (13.88 t ha G¹ ) and 22 March sowing produced the lowest yield (10.22 t ha G¹ ). In case of hormone, Ripen-15 produced the highest yield of okra (14.06 t ha G¹ ) and control produced the lowest (10.06 t ha G¹ ). Combined effect of 06 April sowing with Ripen-15 produced the highest yield (15.98 t ha G¹ ) while 22 March sowing with no hormone gave the lowest yield (9.10 t ha G¹ . Therefore, 06 April sowing with Ripen-15 is best for better growth and yield of okra.

Keywords: Yield, Sowing, Hormones

Location: Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka-1207.

Start Date: 00-03-2007

End Date: 00-08-2007

Program Area: Crop-Soil-Water Management

Commodity: Okra

Objectives:

To find out the optimum sowing time and proper hormone combination for production of okra.

Methodology:

The research was conducted at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka-1207. The experimental field is located at 90°33´ E longitude and 2 3°77´ N latitude at a height of 9.2 meter above the sea level. The land was medium high and well drained. The soil of the experimental site belongs to the agro-ecological region of ‘Madhu pur Tract” (AEZ No. 28) classified by UNDP/FAO. It was Deep Red Brown Terrace soil and belonged to “Nodda” cultivated series. The top soil is silty clay loam in texture. Organic matter content was very low (0.82%) and soil pH varied fro m 5.47-5.63. The experiment was done with BARI dherosh 1. This variety is released by Bangladesh Agricultural Research Institute, Gazipur, Bangladesh. There were two factors in this experiment, viz. date of sowing and hormones. Three different sowing times were S₁ = 22 March, S₂ = 06 April and S₃ = 21 April. The hormones treatments were as: H₀ = No hormone , H₁ = Application of Algagold (Micronutrients concentrations), H₂ = Application of Crops care (Napthalene Acetic Acid, NAA 4.5%) and H₃= Application of Ripen-15 (15% Ethephon). The experiment was laid out in randomized completely block design (RCBD) with three replications.

Seeds of okra cv. BARI derosh 1 were sown based on different treatment variables. The row to row distance was 50 cm while the plant to plant distance was 40 cm. Seed sowing was done manually. Before sowing the experimental plots were fertilized with 250: 80: 130: 100: 5 : 10 kg of urea: tripe superphosphate: muriate of potash: gypsym: zinc oxide: boric acid as the recommended dose. During final land preparation one half of the urea and total amount of other fertilizers were applied and incorporated into soil. Rest of the urea was top dressed at flower initiation stage. Weeding was done two times manually with ‘nirani’. Thinning was done in all the unit plots with care to maintaining a one plant in a hill. Irrigation was done whenever necessary by water cane at afternoon. The crop was sprayed with Ripcord, Bavistin, Admire and Malathion 60 EC to prevent infestation of insects and vectors of virus. At maturity the crop was harvested at different intervals. The data were analyzed following Analysis of Variance (ANOVA) technique and mean differences were adjusted by the t-test. Means were compared by using Duncan’s New Multiple Test (DMRT) at 5% level of significance.

Source of Information: Journal of Horticultural Science & Ornamental Plants 1 (1): 10-14, 2009, ISSN 2079-2158

Article Link (Online Journal): http://www.idosi.org/jhsop/1(1)09/3.pdf

Funding Source:

1.	Budget:
2.	Budget:

Total Budget (Tk.) :

Achievement/Findings:

A significant variation of fruit yield of okra per hectare was also observed due to the combined effect of sowing times and hormones. In the present study the combined effect of 06 April sowing coupled with application of Ripen-15 (S₂H₃ ) produced the highest fruit yield (15.98 t ha G¹) while the combined effect of 22 March sowing and no hormones application (S₁H₀ ) gave the lowest yield (37.2 t ha G¹ ) which was statistically at per with S₂H₀ (37.4 t ha G¹ ) and S₃H₀ (38.2 t ha G¹ ) and S₁H₁ (39.0 t ha G¹ ). Sajjan et al . confirmed this result.

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