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Determining Suitable Row Ratio and Spacing for Increasing Seed Yield During T Aman Season 2006

Dr. Md. Jamil Hasan
Principal Scientific Officer
Head Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Abstract/ Executive Summary:

Planting of 15 cm x 15 cm spacing with 2:12 row ratio gave the highest seed yield (1.20 t/ha) and the lowest yield (0.92 t/ha) was obtained from 15 cm x 15 cm spacing with 2:8 and 2:10 row ratio. Highest out crossing rate was observed from 20 cm x 15 cm spacing with 2:10 row ratio.

Keywords: Row ratio, Spacing, GA3

Location: BRRI HQ, Gazipur

Start Date: 11-07-2006

End Date: 31-10-2006

Program Area: Variety and Species

Commodity: Rice

Objectives:

To find out suitable row ratio and spacing for a promising new hybrid combination

Methodology:

BRRI1A, BR827R.The restorer line (R) was sown in three different dates. The second seeding of restorer line was corresponded with CMS (A) line seeding date. Fertilizers were applied @ 7 gm, 4 gm and 7gm urea,TSP and MP, respectively in 1m² meter area of seed bed at 10 days after sowing. Twenty one days old seedling were transplanted at a spacing of 15 x 15, 20 x 15 and 20 x 20 cm² with 2:8, 2:10, 2:12 and 2:14 ratio to R & A line using RCB factorial design with three replication. The rows were transplanted on orientation perpendicular to the prevailing wind direction at the time of flowering. Fertilizers @ 150:100:70:60:10 kg/ha urea, TSP, MP, gypsum and zinc sulphate were applied. Intercultural operations, irrigation, rouging, GA₃ application and supplementary pollination were performed.

Source of Information: BRRI Annual Report 2006-2007 page no. 238

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) : 50000/-

Achievement/Findings:

Hybrid rice seed production is not suitable for T Aman season due to excessive rain in flowering time. How ever, for a promising hybrid combination (BRRI1A/BR827R), planting of 15 cm x 15 cm spacing with 2:12 row ratio gave the highest seed yield (1.20 t/ha) and the lowest yield (0.92 t/ha) was obtained from 15 cm x 15 cm spacing with 2:8 and 2:10 row ratio. Highest out crossing rate was observed from 20 cm x 15 cm spacing with 2:10 row ratio.

Knowledge Management: Report/Proceedings