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Evaluation of Sesbania Application and Weed Management Practices in T.aman Under Boro-fallow-t.aman Cropping Pattern

ABM Jamiul Islam
Scientific Officer
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur-1701

Md Khairul Quais
Scientific Officer
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur-1701

Nargis Parvin
Scientific Officer
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur-1701

Abstract/ Executive Summary:

Evaluation of Sesbania application and weed management in T. Aman rice in Boro-Fallow-T. Aman cropping pattern indicated that Sesbania incorporation before T.Aman rice significantly influenced yield and yield contributing characters except 1000 grain weight. Sesbania incorporation by applying herbicide 30 days after seeding gave the highest yield (3.70 t/ha).

Keywords: Weeding, Sesbania, Herbicide, Rice, Wheat

Location: BRRI farm, Gazipur

Start Date: 01-07-2010

End Date: 30-07-2011

Program Area: Farming System

Commodity: Manures, Weed management

Objectives:

To identify suitable weed management practices under Sesbania mulched condition in T. Aman under Boro-Fallow-T. Aman cropping pattern

Methodology:

The experiment was commenced in Aman season, 2009 at BRRI, Gazipur. In Boro season, 2009-10 BRRI dhan29 was used as blank crop. BRRI dhan49 was used in T.Aman season, 2010 where Sesbania was incorporated on two different dates (30 DAS and 40 DAS) and by two different methods (by herbicide application and by ploughing down). Thus treatments were herbicide application on 30 day old Sesbania (S₂), herbicide application on 40 day old Sesbania (S₃), 40 day old Sesbania was ploughed down (S₄) and no Sesbania (S₁). On the other hand, weeding was done in different times after transplanting. Hand weeding at 15, 30 and 45 DAT (W₁), at 30 and 45 DAT (W₂), at 45 DAT (W₃) and no weeding (W₄) were executed in the experiment to evaluate the effect of Sesbania on weed suppression. The experiment was laid out in RCB design with three replications.

Source of Information: Proceedings of the BRRI Annual Internal Research Review, 2010-11

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

During Boro season, BRRI dhan29 was harvested at 12 May, 2010 and yielded 7 t/ha. Irrespective of weeding method, Sesbania incorporation before T.Aman rice significantly influenced yield and yield contributing characters except 1000 grain weight. Sesbania incorporation by applying herbicide 30 days after seeding (S₂₎ gave the highest yield (3.704) which was 20% higher than no Sesbania (3.087) treated plot. Sesbania incorporation through ploughing and herbicide application at 40 DAS were statistically similar. Irrespective of Sesbania application, hand weeding at 15, 30 and 45 DAT gave the highest grain yield 4.217 t/ha which was 28 and 7% higher than hand weeding at 45 DAT and hand weeding at 30, 45 DAT. No weeding gave the lowest 2.144 t/ha grain yield.

Knowledge Management: Report/Proceedings