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Effect of Water Management and Sowing Date on Aman Rice Cultivation by Drum Seeder

Dr Shahana Parveen
SSO
IWMD, BRRI

Abstract/ Executive Summary:

The experiment was conducted at the research field of BRRI farm, Gazipur during the Aman season of 2006. The rice cultivars were used as BRRI dhan39. This experiment was carried out with three irrigation treatments and four sowing dates. The experiment was laid out in a split plot design with three replications having unit plot size of 2.5m × 4.5m. Sowing dates were in main plot and water management treatments were in sub plot. Daily RF pattern during sowing time (June, July) of 2006 showed that mid June sowing need land preparation water depending on rainfall occurred. ET demand of crop varied by sowing time and S&P demand varied by water management. ET demand varied from 408 mm to 496 mm. S&P demand varied from 399 mm to 421 mm by the water treatment. Seasonal rainfall occurred varied from 761 mm to 1001 mm during 2006 depending on various sowing date. Crop matured at 10 days earlier in late sowing plant than early sowing plant. Yield and yield contributing factors of BRRI dhan39 showed that the highest number of panicle per m² area observed 329. It is varied from 272 to 329 in year 2006. Mid June sowing (S₁) gave the highest no. of effective tiller/m². Filled grain per panicle was higher in 31st July sowing (S₄) and that varied from 81 to 112. Grain sterility in percentage is lowest in 31st July sowing. It is observed that grain sterility (%) effected by sowing date but not by water treatment. Grain yield was statistically significant different by sowing date. The highest grain yield was obtained from mid June sowing in 2006. It was statistically significant different by water management. Three supplemental irrigation applied gave the highest yield during this year. WUE varied from 93 to 100. In 2006, seasonal rainfall varied from 761 mm to 1001 mm and effective rainfall was 531 to 836 mm. So, water applied was very similar to water required and resulted as 100% water use efficiency. It is seen from two years study that during Aman season under rainfed condition for getting optimum yield sowing would be done by drum seeder within mid June to 1st July in drum seeding wet seeded rice cultivation.

Keywords: Water management, Sowing date, Water productivity, Supplemental irrigation

Location: BRRI farm, Gazipur

Start Date: 01-07-2006

End Date: 30-06-2007

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To identify appropriate sowing time;
To identify the best water management practice; and
To compare the interaction effect of sowing time and water management practice.

Methodology:

Water treatment

Sowing dates

Aman season, 2006

I₁= Rainfed condition

I₂= Two irrigation each at maximum tillering and panicle initiation stage (If necessary)

I₃= Three irrigation each at maximum tillering, panicle initiation and grain filling stage (If necessary)

S₁= 16th June,

S₂= 1st July,

S₃= 16th July,

S₄= 1st August

Source of Information: Proceedings of the BRRI Annual Internal Review, 2007

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Daily RF pattern during sowing time (June, July) of 2006 showed that mid June sowing need land preparation water depending on rainfall occurred. ET demand of crop varied by sowing time and S&P demand varied by water management. ET demand varied from 408 mm to 496 mm. S&P demand varied from 399 mm to 421 mm by the water treatment. Seasonal rainfall varied from 761 mm to 1001 mm during 2006 depending on various sowing date. Crop matured at 10 days earlier in late sowing plant than early sowing plant. Yield and yield contributing factors of BRRI dhan39 showed that the highest number of panicle per m² area observed 329. It is varied from 272 to 329 in year 2006. Mid June sowing (S₁) gave the highest no. of effective tiller/m². Filled grain per panicle was higher in 31st July sowing (S₄) and that varied from 81 to 112. Grain sterility in percentage is lowest in 31st July sowing. It is observed that grain sterility (%) effected by sowing date but not by water treatment. Grain yield was statistically significant different by sowing date. The highest grain yield was obtained from mid June sowing in 2006. It was statistically significant different by water management. Three supplemental irrigation applied gave the highest yield during this year. WUE varied from 93 to 100. In 2006, seasonal rainfall varied from 761 mm to 1001 mm and effective rainfall was 531 to 836 mm. So, water applied was very similar to water required and resulted as 100% water use efficiency. It is seen from two years study it is shown that during Aman season under rainfed condition for getting optimum yield sowing would be done by drum seeder within mid June to 1st July in drum seeding wet seeded rice cultivation.

Knowledge Management: Report/Proceedings