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Comparative Study of BRRI Dhan41 and Local Variety Rajasail Under Direct Wet Seeded Method at Coastal Char Land of Bangladesh

MS Islam
PSO
Farm Management Division, Bangladesh Rice Research Institute Gazipur-1701

MM Rashid
SO
Farm Management Division, Bangladesh Rice Research Institute Gazipur-1701

E Hossain
Deputy Director
Administration and Common Service, Bangladesh Rice Research Institute Gazipur-1701

MSI Mamin
CSO
Adaptive Research Division, Bangladesh Rice Research Institute Gazipur-1701

M Kamruzzaman
SO
FMPHT Division, Bangladesh Rice Research Institute Gazipur-1701

MA Hossen
SSO
FMPHT Division, Bangladesh Rice Research Institute Gazipur-1701

Abstract/ Executive Summary:

The experimental study was conducted at coastal char land of BRRI Farm, Sonagzi, Feni during T. Aman season, 2005 to compare the yield performance and profitability of BRRI dhan41 and local variety Rajasail under direct wet seeded condition using Drum Seeder technology. Sprouted seeds of BRRI dhan41 and Rajasail were sown as direct wet seeded method using the drum seeder. Factorial RCBD was followed with three replications. The results showed that BRRI dhan41 produced relatively higher grain yield of 2.2 t ha^-1 under weeded condition compared to un-weeded (1.69 t ha^-1) plots. The local variety Rajasail gave about 28% lowers grain yield than that of BRRI dhan41 under weeded condition. However, BRRI dhan41 gave higher grain yield compared to Rajasail under both weeded and un- weeded conditions. Moreover, harvest index was higher in BRRIdhan41 (0.41) under weeded condition but its growth duration was about 20 days longer than that of Rajasail. Regarding the Drum Seeder technology, it appeared as cost saving technology. Higher benefit-cost ratio was obtained for BRRI dhan41 (1.43) under weeded condition because of higher grain yield whereas lower was obtained for local variety (1.02) under weeded condition because of more input cost. Farmer of coastal char land preferred to cultivate Rajasail because of about 20 days early harvest that leads to grow another rabi crops such as lady’s finger, black gram and other winter vegetables in the residual soil moisture. Farmer can cultivate modern variety like BRRI dhan41 using drum seeder technology for harvesting higher benefit.

Keywords: Direct wet-seeded rice, BRRI dhan41, Rajasail, Drum Seeder technology, Rice

Location: BRRI Farm, Sonagzi, Feni of Bangladesh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Rice

Objectives:

The study was conducted at BRRI Sonagazi Research farm to compare the yield performance of one modern variety of BRRI dhan41 and one local variety of Rajasail under direct wet seeded method using Drum Seeder during T. Aman season, 2005.

Methodology:

This study was conducted at BRRI Farm, Sonagzi, Feni of Bangladesh during T. Aman season, 2005 to compare the yield performance and economics of modern rice variety BRRI dhan41 and local variety Rajasail under direct wet seeded method using Drum Seeder technology. Sprouted seeds of the two selected varieties were sown in the well-prepared puddled land as direct wet seeded rice using drum seeder with double thin row (row to row distance: 200 mm) on 29 July 2005. The drum seeder is a manually operated direct seeding farm implement and consists of six drum and two driving wheels. Drum of the drum seeder rotate as the driving wheels rotate. As a result, the seeds from the drum dispensed to the field through the holes. The seed rate was 45 and 50 kg ha^-1 for BRRI dhan41 and Rajasail, respectively because of different grain size and 1000 grains weight. BRRI recommended fertilizers, such as Triple Super Phosphate, Muriate of Potash, Gypsum and Zinc- sulphate were applied as basal @ 100, 70, 60 and 10 kg ha^-1, respectively at the time of final land preparation. Urea was applied @ 160 kg ha^-1 into three equal splits at 15, 45 and 55 days after transplanting (DAT) for each variety. Two times hand weeding were also done at 15 DAT and 35 DAT to keep the field weed free of the weeded plots. Gap filling was done in some spots of the drum seeded and broadcasted plots because of seedling mortality due to heavy rain, bird damage of seeds etc. Plots were kept saturated till the tillering stage and minimum standing water was maintained up to boating stage. However, plots were kept with standing water of 30-40 mm at 35-40 days after sowing. Other intercultural operations were done as and when necessary. Crops and yield attributes data of panicle m^-2, filled grains/panicle, sterility %, duration of maturity, grain and straw yield were recorded. Grain yield and yield contributing parameters were recorded following the procedure of Gomez and Gomez (1984).

Source of Information: Eco-friendly Agril. J. 9 (12):88-92, 2016 (December)

Article Link (Online Journal): www.efaj-international.com

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

BRRI dhan41 gave higher grain yield than Rajasail under both weeded and un-weeded conditions. The low gain yield of Rajasail was attributed for its lower grains per panicle, higher sterility, lodging susceptibility especially at the ripening phase. Cultivation of BRRI dhan41 with proper weed management along with direct wet seeded method using drum seeder technology showed higher BCR (1.43). Farmers of coastal char land can cultivate modern variety like BRRI dhan41 using drum seeder technology for harvesting higher yield and getting more benefit.

Knowledge Management: Journal