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Supper Imposed Variety Trial of T. Aman Rice

Md. Akram Hossain
Senior Scientific Officer
OFRD, BARI, Rangpur

Md. Mohi Uddin
Scientific Officer
OFRD, BARI, Rangpur

Abstract/ Executive Summary:

The experiment was conducted at Syedpur, Rangpur for three successive years (1999, 2000 and 2001) to evaluate the performance of BRRI released T.Aman rice varieties and to fit in the existing cropping pattern (s). The variety BRRIdhan30, BRRIdhan32 and BRRIdhan33 were tested with BR11 as cheek. BRRIdhan30 and BRRIdhan31 produced significantly identical yields to BR11 except 1999. The grain yields of the three varieties range from 4.14-5.11 t/ha over the years. The yield of BRRIdhan33 and BRRIdhan39 produced the significantly lower yields than the BRRIdhan30, BRRIdhan31 and BR11 in each year and their range yields from 3.52-3.78 t/ha but their field duration was statistically lower. BRRIdhan30 gave statistically identical yield (4.79t/ha) to BRRIdhan30 and BRRIdhan31 in 1999. The lower yields of BRRI dhan32 were due to lodging. BRRIdhan34 gave the lowest yield (3.02 t/ha) in 1999, but due to fine grain quality with aromatic flavor it was like by limited number of farmers. Although BR11 produced lowest yield (3.48t/ha in 1999) due to infestation of different pests and diseases. The variety BR11 still now is liked by the farmers for wide ranging ability for transplantation in every type of lands.

Keywords: Supper imposed trial, Rice varieties, Yield, Farmers' reaction

Location: Syedpur, Rangpur

Start Date: 00-00-1999

End Date: 00-00-2001

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To observe the yield performance
To know farmers reaction regarding the suitability of rice varieties.

Methodology:

The experiment was conducted in the farmers’ field for three successive years at the FSRD site Syedpur, Rangpur during the kharif-II season of 1999, 2000 & 2001. The soil was sandy loam under Tista Meander Flood plain (AEZ # 3). The experiment was laid out in RCB design with six dispersed replications each year. Six varieties viz. BRRI dhan30, BRRI dhan31 (2 year), BRRI dhan32, BRRI dhan33, BRRI dhan34 and BRRI dhan39 (2 year) were evaluated against the check variety BR11. The variety BRRI dhan39 was included in the study 2nd year but BRRI dhan31 was dropped (seeds were not available) during the second year also BRRI dhan34 (seeds were not available) during the 2nd and 3rd year. The unit plot size was 10m x 8m. Seedling age 42-45 days were transplanted in lines during July in both the years maintain spacing of 25cm x 15cm. Fertilizer was applied at the rate of 82/68-20-35-11-4 kg N-P-K-S-Zn/ha respectively. Whole quantity of P, K, S and Zn were applied as basal and N (82kg,N/ha for BRRIDhan30, BRRIDhan31 and BR11 & 68 kg N/ha for other verities) was applied as top dress in three equal splits at 15, 30 and 45 days for BRRI dhan32, BRRI dhan33, BRRI dhan34 & BRRI dhan39 and 15, 30 and 50 for other varieties after transplantation. Plant protection measures and other inter cultural operation were done as and when required. The crops were harvested during last part of October to early part of November in both the year. Data on the yield and yield contributing characters were recorded and analyzed statistically.

Source of Information: Annual Research Report, 2001-02, BARI

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Field duration, plant height, yield and yield attributes were significantly influenced by different varieties. The longest and shortest field duration was observed from BRRIDhan29 and BR11. Significantly highest plant height was recorded from BRRIDhan32 and shortest from BRRIDhan33 and BRRIDhan39. Effective tiller/plant was statistically identical among the varieties except BRRIDhan39 which showed lowest tiller/plant. The BRRIDhan31 revealed higher no. of grains/panicle but statistically identical to variety BR11. The 1000-grain weight was statistically at par to variety BRRIDhan31 and BRRIDhan30. The variety BR11 gave similar yield to BRRIDhan31 but later variety showed 8 days earlier than former variety (BR11). Though BRRIDhan33 and BRRIDhan39 revealed shorter duration but yield was not comparable to BRRIDhan31. The variety BRRIDhan31 showed higher yield than BR11 in average of three year. But straw yield was higher in variety BRRIDhan34 but at par to BRRIDhan32 of T.Aman rice.

Knowledge Management: Report/Proceedings