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Water Management and Herbicide Interaction for Weed Control in Wet Seeding Rice (wsr) Cultivation

Dr M A Sattar
CSO & Head
IWM division, BRRI

Dr M A Kashem Khan
SSO
IWM division, BRRI

Abstract/ Executive Summary:

The experiment was carried out in boro season at BRRI farm, Gzipur with three water treatments Objective of this study was to determine the amount of water required for WSR cultivation, determine the effectiveness of herbicide under different soil moisture regimes and identify the effective herbicide. From this study it was observed that in boro season, wet seeded method of rice cultivation practice gave highest yield, which obtained through irrigation in saturation to field capacity with herbicide application before sowing of sprouted seed. Although wet seeded rice was a good method of saving water and shorten total growth duration, still it was not popular to the farmers due to lack of demonstration, timely start of pump unit and lack of awareness of the technology.

Keywords: Water management, Herbicide, Weed control, WSR

Location: BRRI farm, Gazipur

Start Date: 01-07-2000

End Date: 30-06-2001

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To determine the amount of water required for WSR cultivation
To determine the effectiveness of herbicide under different soil moisture regimes
To identify the effective herbicide

Methodology:

The experiment was carried out in boro season at BRRI farm, Gazipur with three water treatments of which T₁=Continuous standing water; T₂=saturation to field capacity; T₃=irrigation 3 days after disappearing standing water. There were three herbicides treatments of which H₁=herbicide was applied after land preparation but before sowing the seeds; H₂=herbicide was applied 7 days after sowing the seeds; H₃=no herbicide was applied.

Source of Information: Proceedings of BRRI Annual Internal Research Review, 2001

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Interaction effect of irrigation and herbicide showed that the highest yield (6610 kg/ha) was obtained under both the treatment of herbicide was applied before sowing the seeds and herbicide applied 7 days of seeding and water treatment was saturation to field capacity. Dry weight of weed under different water management and different herbicide management indicated that herbicide applied before broadcasting the sprouted seed perform better than apply sowing the seeds.

Knowledge Management: Report/Proceedings