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Screening of Rice Cultivars Suitable for Early Transplanting in Haor Agriculture

A. K. M. Golam Sarwar
Laboratory of Plant Systematics, Department of Crop Botany, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Sontosh Chandra Chanda
Laboratory of Plant Systematics, Department of Crop Botany, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Md. Mozahidul Islam
Laboratory of Plant Systematics, Department of Crop Botany, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Jannat-E-Tajkia
Laboratory of Plant Systematics, Department of Crop Botany, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the farmer’s field in Dowarabazar, Sunamganj during November 2018 to April 2019 to find out suitable cultivar(s) for early transplanting mediated low-temperature stress tolerance in boro season to avoid the flash flooding. Twelve hybrid rice cultivars, viz. BRRI hybrid dhan2, BRRI hybrid dhan3, BRRI hybrid dhan5, SL-8H, Hybrid LP-70, Agomoni JBS-17(4), Win-302, Winall Hybrid 2, Nobin IS-1, Ispahani 1, Durbar IS-2 and Ispahani 2, were used as experimental materials. The field experiment was laid out in a randomized complete block design with three replications. The standard rice cultivation procedure was followed. Growth and yield contributing descriptors e.g., plant height, number of effective tillers, panicle length, grain yield, etc. differed significantly among the cultivars. Among the studied cultivars, BRRI hybrid dhan5 produced maximum grain yield (5.90 t ha^–1) followed by cultivar Nobin IS-1 (5.88 t ha^–1). The lowest yield was recorded from Ishpahani 2 (3.44 t ha^–1) and the other cultivars produced intermediate yield. It would be concluded that among the studied cultivars, BRRI hybrid dhan5 and Nobin IS-1 could be recommended for early transplanting within the haor area.

Keywords: Low-temperature stress, Hybrid rice, Growth and yield descriptors, Haor agriculture

Location: The farmer’s field in Dowarabazar, Sunamganj, Bangladesh

Start Date: 00-11-2018

End Date: 00-04-2019

Program Area: Variety and Species

Commodity: Rice

Objectives:

To find out rice cultivar(s) suitable for early transplanting mediated low-temperature stress tolerance in boro season among the existing (hybrid) cultivars of Bangladesh.

Methodology:

The experiment was conducted at the farmer’s field in Dowarabazar, Sunamganj during November 2018 to April 2019. Twelve hybrid rice cultivars, viz. BRRI hybrid dhan2, BRRI hybrid dhan3, BRRI hybrid dhan5, SL-8H, Hybrid LP-70, Agomoni JBS-17(4), Win-302, Winall Hybrid 2, Nobin IS-1, Ispahani 1, Durbar IS-2 and Ispahani 2, were used as experimental materials. The experiment was laid out in a randomized complete block design with three replications. The agro-climatic conditions i.e. monthly values of maximum, minimum and average of temperature (°C), average relative humidity (%), total rainfall (mm), total sunshine (hr) and average air pressure (mbar) at Sunamganj, the nearest position (data available) to the experimental site, during the study period have been presented. Thirty days old healthy rice seedlings were transplanted in the experimental plot on 21 November 2018 following standard rice cultivation procedure (BRRI 2017). The crop was harvested at the maturity stage, 80% of grains attained golden color on 8 April 2019 and data regarding the growth and yield contributing descriptors, viz. plant height, tiller number, number of effective and non-effective tillers, length and width at the widest portion of flag leaf, panicle length, number of primary and secondary branches of panicle, number of filled and un-filled grains panicle^–1, 1000-grain weight, grain yield (t ha^–1). The leaf area was calculated following Ribeiro et al. (2019). LA = 0.78×L×W. Where, LA Leaf area, L Leaf length, W Leaf width The collected data were analyzed following the ANOVA using the statistical computer package program MSTAT-C. The mean differences of different parameters among the cultivars were adjudged with Duncan’s New Multiple Range Test (DMRT) (Gomez and Gomez, 1984).

Source of Information: J Bangladesh Agril Univ 18(4): 963–967, 2020 ISSN 1810-3030 (Print) 2408-8684 (Online)

Article Link (Online Journal): https://doi.org/10.5455/JBAU.25243

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It might be concluded that among the studied cultivars, BRRI Hybrid dhan5 and Nobin IS-1 could be recommended for early transplanting in the haor area. Although the grain yield was relatively lower in the early transplanting practice, it might be better compared to the complete crop damage by an early flash flood due to farmer’s traditional practices. Further studies with other hybrids and/or short-duration inbreed rice cultivars are recommended to reach a confident conclusion.

Knowledge Management: Journal