Comparative performance of okra varieties under open field and net tunnel conditions
A.F.M. Jamal Uddin 1*, Habibur Rahman Remel 2, Naisha Najiat 1, Sushoma Showkat Shanta 1 and Tamima Dastagir 1
1 Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.
2 College of Agricultural Sciences, International University of Business Agriculture and Technology, Dhaka, Bangladesh.
✉ *Corresponding author: [email protected].
Research article first published online: 20 January 2026.
1 Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.
2 College of Agricultural Sciences, International University of Business Agriculture and Technology, Dhaka, Bangladesh.
✉ *Corresponding author: [email protected].
Research article first published online: 20 January 2026.
https://doi.org/10.18801/jbar.360126.336
Abstract
The experiment was conducted at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, from April to September 2025, to evaluate the performance of okra (Abelmoschus esculentus L.) varieties under net tunnel and open-field conditions. The study was laid out in a two-factor factorial randomized complete block design (RCBD) with four replications, comprising two growing environments (net tunnel and open field) and four genotypes (Marvelous, Labonyo, Moushumi, and a local variety). Results revealed significant variations in plant growth and yield attributes due to the interaction between environment and genotype. Cultivation under net tunnel conditions improved the germination percentage, accelerated flowering, and enhanced pod setting compared to open-field conditions. Among the tested genotypes, ‘Marvelous’ produced the tallest plants (118.8 cm), while G4 (Moushumi) demonstrated the highest productivity, recording the greatest number of pods per plant (26.2) and the maximum yield (64.7 t ha⁻¹). The average yield under net tunnel cultivation (59.0 t ha⁻¹) was higher than that under open field (22.9 t ha⁻¹). The findings indicate that combining net tunnel technology with the high-yielding, heat-tolerant okra variety ‘Moushumi’ offers a promising strategy to reduce heat stress and significantly improve okra productivity under Bangladeshi conditions.
Keywords: Okra (Abelmoschus esculentus L.); Net tunnel; Open field; Genotype × environment interaction; Yield performance; Heat stress; Protected cultivation
The experiment was conducted at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, from April to September 2025, to evaluate the performance of okra (Abelmoschus esculentus L.) varieties under net tunnel and open-field conditions. The study was laid out in a two-factor factorial randomized complete block design (RCBD) with four replications, comprising two growing environments (net tunnel and open field) and four genotypes (Marvelous, Labonyo, Moushumi, and a local variety). Results revealed significant variations in plant growth and yield attributes due to the interaction between environment and genotype. Cultivation under net tunnel conditions improved the germination percentage, accelerated flowering, and enhanced pod setting compared to open-field conditions. Among the tested genotypes, ‘Marvelous’ produced the tallest plants (118.8 cm), while G4 (Moushumi) demonstrated the highest productivity, recording the greatest number of pods per plant (26.2) and the maximum yield (64.7 t ha⁻¹). The average yield under net tunnel cultivation (59.0 t ha⁻¹) was higher than that under open field (22.9 t ha⁻¹). The findings indicate that combining net tunnel technology with the high-yielding, heat-tolerant okra variety ‘Moushumi’ offers a promising strategy to reduce heat stress and significantly improve okra productivity under Bangladeshi conditions.
Keywords: Okra (Abelmoschus esculentus L.); Net tunnel; Open field; Genotype × environment interaction; Yield performance; Heat stress; Protected cultivation
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Journal of Bioscience and Agriculture Research EISSN 2312-7945.