Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Competitive Ability of Rice Cultivars Against Weed Suppression in Wet Seeded Boro Rice

Md. Khairul Alam Bhuiyan
SSO
Agronomy Division, BRRI, Gazipur

M A J Mridha
CSO
Agronomy division, BRRI, GAzipur

Abstract/ Executive Summary:

Weed competitive rice genotypes may reduce weed pressure and improve rice productivity. The study was set up during boro 2008 season at BRRI farm Bhanga, Faridpur to observe the magnitude of variety variation for weed suppressive ability and yield under moderate weed competition. Exotic rice varieties.WITAI2, WITA3,WOO-CO and BRRI dhan28 were imposed in sub plots and weed free,unweeded and one hand weeding were treated as main plot using split plot design. Among the varieties plant height was constantly highest in WOO-CO variety in different days. Leaf area index at PI stage was highest in WOO-CO followed by WITA12 and WITA4 varieties. Highest plant height and LAI at PI stage indicates the weed suppression ability of these varieties. Lowest weed number and weight was also found in WOO-CO which indicate competitiveness with weed of these varieties. Although WOO-CO performed as superior weed suppression ability but grain yield obtained lowest due to its lowest 1000 grain weight. The varieties produced optimum yield in unweeded condition except BRRI dhan28 where WITA12 WITA3 and WOO-CO produced considerable yield in one hand weeded conditions and also in unweeded condition. The study indicates early growth and lower weed biomass can be useful criteria for selecting weed competitive rice cultivars

Keywords: Exotic rice varieties, Weed competetiveness, Yield

Location: BRRI regional station, Bhanga

Start Date: 01-12-2007

End Date: 12-08-2008

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To determine the magnitude of variety variation for weed suppressive ability and yield under moderate weed competition.

Methodology:

The experiment was conducted during Boro season 2007-08 at BRRI farm Bhanga to observe the competence of weed suppression capability of some exotic rice varieties in wet seeded condition. Weed competes more acutely in direct seeded condition than transplanted rice. WITA12, WITA3,WOO-CO and BRRI dhan28 were used as rice varieties in sub plots and three weed management treatment viz. weed free, unweeded and one hand weeding treated as main plot using split plot design with 3 replication. Unit plot size was 12m². Weed free plots kept weed free through the growing season. One hand weeded plot kept a certain level of weed, weeded at 25 days after planting. Weed occurrence was evaluated at 50 days after planting. Fertilizer was applied as per recommended dose. Other cultural operations were done when necessary.

Source of Information: Proceeding of the BRRI annual research review, 2008

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 20000

Total Budget (Tk.) : 20000

Achievement/Findings:

The study indicates early growth and lower weed biomass can be a useful criteria for selecting weed competitive cultivars where the target is to develop cultivars that can produce economically acceptable yields with a single hand weeding soon after sowing. Development of such cultivars could substantially reduce the labor requirements for rice production .

Knowledge Management: Report/Proceedings