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Crop Residue and Weed Management of Permanent Raised Beds in Rice-wheat Systems

Shila Pramanik
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

Dr. Md. Nasim
Principal Scientific Officer
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur-1701

Abstract/ Executive Summary:

The rice equivalent yield (REY) of DS Rice-Wheat-Mungbean cropping pattern was significantly higher in permanent bed (10.04 t/ha) than flat (conventional) method (7.96 t/ha). BCR was found better in bed practices due to less cost involvement in different management.

Keywords: Rice, Wheat, Mungbean, Management practices, Benefit-cost ratio

Location: BRRI farm, Gazipur

Start Date: 01-07-2010

End Date: 30-07-2011

Program Area: Farming System

Commodity: Rice, Chemical weed management, Manures

Objectives:

To compare the effect of crop residue retention and herbicide use for weed control on the productivity of permanent beds and compare the agro-economic productivity and resource use efficiency of permanent bed system and conventional method.

Methodology:

A long-term experiment was commenced in Rabi season 2006-07 with wheat at BRRI experimental farm, Gazipur. Five crop establishment options viz., T₁-permanent beds with 100% crop residue retention ; T₂-permanent beds with 50% crop residue retention; T₃- permanent beds without crop residue retention; T₄- Semi permanent beds (new beds with conventional tillage in every wheat season) and T₅-conventional (flat), and two weed control methods viz. (W₁) hand weeding and (W₂) herbicide + hand weeding are being evaluating in RCB design with three replications in Wheat-Mungbean-DS Aman rice cropping pattern. For the treatments with beds, 70 cm (40 cm top and 30 cm furrow) wide beds with 15 cm height were made. For the treatments with herbicide, non-selective herbicide Roundup was used in transition period between mungbean and rice and the transition period between wheat and mungbean. In Rabi season, wheat was sown on 22 Nov 2009 and harvested on 22 March 2010. Again mungbean was sown on 01 April 2010 after wheat harvest. Mungbean was harvested on 24-30 June 2010 and after harvesting mungbean DS (BRRI dhan39) rice was sown on 17 July 2010. DS (BRRI dhan39) rice was harvested on 08 Nov 2010 and was followed by Wheat. Recommended management practices were followed for wheat, mungbean and rice cultivation.

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:

Significantly higher grain yields of wheat was produced by permanent beds with 100% crop residue retention. Mungbean performed significantly better at permanent beds with crop residue retention. Grain yields of rice were obtained better from different permanent beds than conventional flat land. The Rice equivalent yield (REY) of Wheat-Mungbean-DS Rice cropping pattern was significantly higher in permanent bed practices (10.04) than flat (conventional) method. As REY was higher in bed than flat method, BCR was found better in bed practices due to less cost involvement in different management.

Knowledge Management: Report/Proceedings