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Development of Seedling Raising Technique for Mechanical Rice Transplanter

Dr. Md. Durrul Huda
Principal Scientific Officer
Farm Machinery and Postharvest Technology Division, Bangladesh Rice Research Institute, Gazipur-1701.

Bidhan Chandra Nath
Farm Machinery and Postharvest Technology Division Bangladesh Rice Research Institute Gazipur-1701

Md. Anwar Hossen
Senior Scientific Officer
Farm Machinery and Postharvest Technology Division, Bangladesh Rice Research Institute, Gazipur-1701.

Subrata Paul
Scientific Officer
Farm Machinery and Postharvest Technology Division, Bangladesh Rice Research InstituteGazipur-1701.

Abstract/ Executive Summary:

The quality of seedling is very important for successful operation of mechanical rice transplanter. The seedling height should be 10-12cm with 3-4 leaves, 2-4 seedling per square centimeter and a 2.0 - 2.5cm soil thickness were appropriate for mechanical transplanting. The seedling raised on leveled wet bed on polythene sheet using wooden strip to separate the individual seedling block and soil as seed covering materials gave better seedling strength. The highest seedling strength was found for T₁₄ (227.22) treatment followed by T_5, T₆, and T₂ treatments respectively. The lowest seedling strength was found for T₁₃(86.47) treatments followed by T₃, and T9 respectively. Therefore, T₁₄ treatment seedling was suitable for machine transplanting. The experiment would be repeated in several rice seasons to get better results.

Keywords: Transplanter, Filler material, Rice husk, Plastic tray, Saw dust

Location: Gazipur

Start Date: 01-07-2009

End Date: 30-06-2010

Program Area: Farm Mechanization

Commodity: Transplanter

Objectives:

To evaluate the suitable seedling raising technique for mechanical transplanting in Bangladesh condition

Methodology:

The quality of seedling is very important for successful operation of mechanical rice transplanter. The seedling was raised in a number of ways for machine transplanting i.e. dry and soft bed on polythene sheet, flexible and rigid tray and industrialized method. The seedling raised on polythene sheet was cut into slices of 28 × 58 cm size to feed into the seedling trays of the transplanter. However, the seedling raised in the tray can go directly to the transplanter tray because seedling tray and the transplanter tray were of same size. A piece of perforated polythene sheet (The holes are made of 0.2 - 0.3cm diameter with 2 × 2 cm spacing) was placed on a leveled dry/wet bed and wood strips of 2.0-3.0cm wide and 2.0cm thick were used to control the thickness of seedbed and separate seedling block according to transplanter tray size. Plastic tray of 28 × 58 × 2.5cm size was used for raising seedling. About 375 seedling trays was needed for one hectare land transplanting. A total of fourteen treatments combing with different seed covering materials and dry and sprouted seed were used for this experiment. The cowdung mixed soil and without cowdung mixed soil were also used as treatment for this experiment. The treatments were as follows: T₁= Dry seed+ Soil+ Rice Husk T₂= Dry seed+ Soil+ Sawdust T₃= Dry seed+ Soil+ Soil T₄=Dry seed+ (Soil+ cowdung) + Rice Husk T₅= Dry seed+ (Soil+ cowdung) + Sawdust T₆= Dry seed+ (Soil+ cowdung) + Soil T₇=Sprouted+ Soil + Rice Husk T₈=Sprouted+ Soil + Sawdust T₉=Sprouted+ Soil + Soil T₁₀= Sprouted + (Soil+ cowdung) + Rice Husk T₁₁= Sprouted + (Soil+ cowdung) + Sawdust T₁₂= Sprouted + (Soil+ cowdung) + Soil T₁₃=Frame+ sprouted+ soil T₁₄=Frame+ dry seed+ soil

Source of Information: BRRI Annual Research Review 2009-10

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest seedling strength was found for T₁₄ (227.22) treatment followed by T₅, T₆, and T₂ treatments respectively. The lowest seedling strength was found for T₁₃ (86.47) treatments followed by T₃, and T₉ respectively . Therefore, T₁₄ treatment seedling was suitable for machine transplanting.

Knowledge Management: Report/Proceedings