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Evaluation of Double Transplanting and Normal Transplanting of T Aman and Boro Rice Under T Aman-boro Cropping Systems

ABHIJIT SAHA
Principle Scientific Officer
Rice Farming Systems Division Bangladesh Rice Reseaech Institute Gazipur-1701

SATYAN MANDAL
Scientific Officer
Rice Farming Systems Division Bangladesh Rice Reseaech Institute Gazipur-1701

MD. KHAIRUL QUAIS
Scientific Officer
Rice Farming Systems Division Bangladesh Rice Reseaech Institute Gazipur-1701

S. M. SHAHIDULLAH
Senior Scientific Officer
Rice Farming Systems Division Bangladesh Rice Reseaech Institute Gazipur-1701

Abstract/ Executive Summary:

This study was conducted with the objective to to minimize yield loss of Boro rice due to delayed planting through the adoption of double transplanting and to increase system productivity. The experiment was conducted during T Aman 2011 and Boro 2011-12 seasons at BRRI farm, Gazipur. In this experiment five planting methods with three varieties were used. The design of the experiment was RCB with three replications.

Under late situation, double transplanting done on the same day of normal transplanting gave significantly higher grain yield than that of normal transplanting in both T Aman and Boro seasons.

Keywords: Double transplanting, Normal transplanting, Boro, T. Aman, Rice yield.

Location: BRRI, Gazipur

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Farming System

Commodity: Rice

Objectives:

To minimize yield loss of Boro rice due to delayed planting through the adoption of double transplanting
To increase system productivity

Methodology:

The experiment was conducted during T Aman 2011 and Boro 2011-12 seasons at BRRI farm, Gazipur. In this experiment five planting methods with three varieties were used. The design of the experiment was RCB with three replications. In T Aman season, treatments were: Factor A: Planting methods under different time of transplanting: T₁- Normal transplanting with 30- day- old seedling on 25 July; T₂- Normal transplanting with 30-day-old seedling on 25 August; T₃- Normal transplanting with 30-day-old seedling on 25 September; T₄- Normal transplanting with 60-day-old seedling on 25 September; T₅- Double transplanting with (30+30)-day-old seedling (1^st TP: 25 August; 2^nd TP 25 September; sowing 25 July) and Factor B: Variety: V₁- BRRI dhan49, V₂ – BR22 and V₃ - BRRI dhan46. In Boro, under factor A: Planting method: T₁- Normal transplanting with 30-day-old seedling on 25 December; T₂- Normal transplanting with 40-day-old seedling on 15 January; T₃- Normal transplanting with 40-day-old seedling transplanted on 25 February; T₄- Normal transplanting with 80-day-old seedling transplanted on 25 February; T₅- Double transplanting with (40+40)-day-old seedling (1^st TP: 15 January; 2^nd TP 25 February; sowing 05 December). For factor B: Variety: V₁- BRRI dhan28, V₂– BRRI dhan29 and V₃- BRRI dhan45 were used. Nitrogen, P, K, S and Zn were applied as per recommendation. Except urea all fertilizers were applied during final land preparation. Urea was applied in three equal split but in T₄and T₅ only two splits were applied.

Source of Information: BRRI Annual Internal Review Report, 2011-12

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The results of the study revealed that the effect of establishment method and interaction between establishment methods (EM) and variety was significant for all the studied parameters in both T Aman and Boro seasons. Effect of variety was significant for all the parameters in Boro season but in T Aman season all the parameters were non significant except grain yield (t/ha). In T Aman season, all the varieties gave the highest grain yield in optimum time normal transplanting method (T₁). In T₁ EM, BRRI dhan46 gave the highest grain yield of 6.66 t/ha followed by BRRI dhan49 (6.38 t/ha) among the tested varieties. While BRRI dhan49 gave the significantly higher (5.81 t/ha ) yield than BRRI dhan46 and BR22 in T₂EM. On the contrary, In T₃EM, BRRI dhan49 gave lowest yield among the five EM but there is no significant difference between T₃ and T₄EM for BR22 and BRRI dhan46. Double transplanting (T₅) of all the tested varieties on the same day gave significantly higher yield than T₄ establishment method. The effect of double transplanting was more pronounced in Boro season where all the varieties (BRRI dhan28, BRRI dhan29 and BRRI dhan45) gave similar yield in double transplanting (T₅) to that obtained in normal transplanting (T₂). The lowest yield was obtained in T₄establishment method except in BRRI dhan29, which was transplanted on 25 February on the same day of double transplanting in normal transplanting method.

Knowledge Management: Report/Proceedings