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Effect of Zinc and Boron on Growth and Yield of Okra (abelmoschus Esculentus L.)

Nusrat Jahan
Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Md. Ashabul Hoque
Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Md. Rasal-Monir
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Sumya Fatima
Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Mohammad Nurul Islam
Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Md. Belal Hossain
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Abstract/ Executive Summary:

The study was carried out to find out the effect of zinc (Zn) and boron (B) on the growth and yield of okra (BARI Dherosh 1). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The treatments of the experiment were, T₀ (without Zn or B), T₁ (20 kg Zn ha^-1), T₂ (30 kg Zn ha^-1), T₃ (10 kg B ha^-1), T₄ (20 kg B ha^-1), T₅ (20 kg Zn ha^-1 + 10 kg B ha^-1), T₆ (20 kg Zn ha^-1 + 20 kg B ha^-1), T₇ (30 kg Zn ha^-1 + 10 kg B ha^-1) and T₈ (30 kg Zn ha^-1 + 20 kg B ha^-1) were undertaken to evaluate the best results of the study. The highest plant height was found in T₈ (30 kg Zn ha^-1 + 20 kg B ha^-1) but the highest number of leaves plant^-1 was recorded from T₇ (30 kg Zn ha^-1 + 10 kg B ha^-1). On the other hand, the maximum leaf area index, SPAD value, mean fruit weight, fruit length, fruit diameter, fruit dry matter (%), number of fruits plant^-1, fresh fruit weight plant^-1, fruit yield plot^-1, and fruit yield ha^-1 were found in T₇ (30 kg Zn ha^-1 + 10 kg B ha^-1), while the control (T₀) showed the lowest performance for the respected parameters. It is strongly concluded that 30 kg Zn ha^-1 with 10 kg B ha^-1 combination may be helpful for okra cultivation at the field level to increase okra production.

Keywords: Okra; Zinc, Boron

Location: Agricultural Botany, Sher-e-Bangla Agricultural University

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Okra, Zinc, Boron

Objectives:

To evaluate the integrated performance of zinc and boron for growth and yield of okra and therefore determine the optimum doses of Zn and B association on growth and yield of okra.

Methodology:

The experiment was conducted at the Department of Agricultural Botany, Sher-e-Bangla Agricultural University in 24º09′N latitude and 90º26′E longitudes. The seeds of okra variety BARI Dherosh were collected from BARI (Bangladesh Agricultural Research Institute), Joydebpur, Gazipur, Bangladesh. The soil was treated with insecticides (cinocarb 3G at 4 kg ha^- ¹) at the time of final land preparation to protect young plants from the invasion of soil inhibiting insects such as cutworm and mole cricket. Urea, Triple superphosphate (TSP), Muriate of potash (MoP), ZnSO₄ and boric acid were used as sources of nitrogen, phosphorous, potassium, zinc, and B respectively. Cow dung (10 t/ha), urea (150 kg/ha), TSP (100 kg/ha), MoP (150 kg/ha) was applied in the soil. The total amount of cow dung, TSP and MP was applied as basal dose at the time of final land preparation. Urea was applied at 15, 30 and 45 days after sowing (DAS). The treatments of the experiment were T₀ (without Zn or B), T₁ (20 kg Zn ha^-1), T₂ (30 kg Zn ha^-1), T₃ (10 kg B ha^-1), T₄ (20 kg B ha^-1), T₅ (20 kg Zn ha^-1 + 10 kg B ha^-1), T₆ (20 kg Zn ha^-1 + 20 kg B ha^-1), T₇ (30 kg Zn ha^-1 + 10 kg B ha^-1) and T₈ (30 kg Zn ha^-1 + 20 kg B ha^-1) that were undertaken to evaluate the role of Zn and/or B on growth and yield The single factor experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The total area was divided into three equal blocks. Each block was divided into 9 plots where 9 treatments were allotted randomly. There were 27 unit plots totally in the experiment. The size of each plot was 3.0 m × 1.5 m. The distance maintained between two blocks and two plots were 0.5 and 0.5 m, respectively. The spacing was at 60 × 50 cm. Seeds were treated with Bavistin at 2 ml/L of water before sowing the seeds to control the seed-borne diseases. The seeds were sown in rows having a depth of 2-3 cm with maintaining distance from 50 cm and 60 cm from plant to plant and row to row, respectively. After raising seedlings, various intercultural operations such as gap filling, weeding, earthing up, irrigation pests, and disease control were accomplished for better growth and development of the okra seedlings. Irrigation was given for 7 days starting from germination for their proper establishment. The weeding was done at 15, 30, and 45 days after sowing to keep the plots free from weeds. Cutworms were controlled both mechanically and spraying Darsban 29 EC at 3%. Some discolored and yellowish diseased leaves were also collected from the plant and removed from the field. Five plants were randomly selected from the middle rows of each unit plot for avoiding border effect, except yields of plots, which were recorded plot-wise. Data were collected in respect of the growth, yield attributes and yields as affected by different treatments of the experiment. The data obtained for different parameters were statistically analyzed by using MSTAT-C software to find out the significance of the difference for B and Zn fertilizer on the growth and yield of okra. The mean values of all the recorded parameters were evaluated and analysis of variance was performed by the ‘F’ (variance ratio) test. The significance of the difference among the means of treatment combinations was estimated by Duncan’s Multiple Range Test (DMRT) at a 5% level of probability.

Source of Information: Asian Journal of Advances in Agricultural Research- 12(1): 41-47, 2020

Article Link (Online Journal): DOI: 10.9734/AJAAR/2020/v12i130073

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the above results, it can be concluded that the treatment T₇ (30 kg Zn ha^-1 + 10 kg B ha^-1) gave the best performance on different growth, development, and yield of okra and this treatment showed the highest yield (17.22 t ha^-1). So, this treatment can be considered as best among the whole treatments studied under the present study. It is also recommended for further study in the different agro-ecological zone.

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