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Effect of Water Management and Sowing Date on Direct Wet Seeded Aman Rice Cultivation by Drum Seeder Method-2007

Shahana Parveen
Senior Scientific Officer
Irrigation and Water Management Division, BRRI.

Dr M A Sattar
Head and Chief Scientific Officer
Irrigation and Water Management Division, BRRI.

Abstract/ Executive Summary:

Rainfall distribution pattern showed that during peak transplanting time (August) there is no sufficient rainfall. So, supplemental irrigation required both in land preparation to crop maturity stage. A study was undertaken to find the effect of water management and sowing date on direct wet seeded Aman rice cultivation . Three water treatments and four sowing dates were followed. It was found from study that for getting optimum yield sowing would be done by drum seeder within mid June to 1st July. In delayed sowing, 31st July sowing gave the highest yield with three supplemental irrigation. For maximum yield of wet seeded Aman rice three irrigation should be applied each at maximum tillering, panicle initiation and heading stage. Water productivity was maximum in 31st July sowing with three supplemental irrigation. Early sowing gave better yield if there is no climatic hazard. In delayed condition, 31st July sowing gave the highest yield with 2 supplemental irrigation. The highest water productivity obtained from 31 July sowing with 2 supplemental irrigation.

Keywords: Water management, Direct wet seeding rice, Drum seeder

Location: BRRI farm, Gazipur

Start Date: 01-07-2006

End Date: 30-06-2008

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To identify appropriate sowing time for direct wet seeded aman rice cultivation
To identify the best water management practice for direct wet seeded aman rice cultivation
To compare the interaction effect of sowing time and water management practice

Methodology:

The experiment was laid out in a split plot design with three replication having unit plot size of 2.5m×4.5m. Water treatment I₁=Rainfed I₂=Irrigation (5-7 cm) when water is 15 cm below the soil surface I₃=Irrigation (5-7 cm) when water is 30 cm below the soil surface Sowing date S₁=16 June S₂=1 July S₃=16 July S₄=31 July. The variety was BRRI dhan39. ??Fertilizers were applied at the rate of 135-50-60-35-5 kg/ha of urea, TSP, MP, gypsum and Zinc sulfate, respectively. Except urea all fertilizers were applied during the final land preparation. Urea was applied in four equal splits at 25, 40, 55 and 65 days after sowing (DAS). Hand weeding was done when needed.

Source of Information: Proceedings of BRRI Annual Internal Research Review, 2006-7; and Bangladesh Rice J. 14(1&2), p119-125

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Grain yield was statistically significant by sowing date. The highest grain yield was obtained from mid July sowing. It was statistically significant by water management. Two supplemental irrigation gave the highest yield during this year. From the interaction effect highest grain yield was obtained from 16 July sowing with one supplemental irrigation. WUE varied from 61 to 100. Seasonal effective rainfall was very similar to water required. Relative water supply (RWS) varied from 0.98 to 1.58. The highest RWS used in 1 July sowing with one supplemental irrigation. Water productivity varied from 2.25 to 4.30. The minimum water productivity was found from 1 July sowing plant due to disturbance of climatic hazard at grain filling stage. The highest water productivity obtained from 31 July sowing with two supplemental irrigation.

Knowledge Management: Journal, Report/Proceedings