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

Shila Pramanik
Senior Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Md Saiful Alam Talukder,
Senior Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Abhijit Saha
Principal Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Akhter Hossain Khan
Principal Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

M.A. Quddus
Chief Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Abstract/ Executive Summary:

The Rice equivalent yield (REY) of DS Rice-Wheat-Mungbean cropping pattern was significantly higher in permanent bed (11.10 t/ha) than flat (conventional) method (9.48 t/ha). Rice yields were significantly higher in conventional practice while wheat and mungbean performed significantly better in permanent beds. BCR was found better in bed practices due to less cost involvement in different management.

Keywords: Permanent bed, Resource use efficiency, Rice-wheat-mungbean cropping pattern, BCR

Location: BRRI farm, Gazipur

Start Date: 01-07-2008

End Date: 30-06-2009

Program Area: Farming System

Commodity: Rice, 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:

The experiment is a long-term experiment and commenced in Rabi season 2006-07 with wheat at East byed, 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 Gramoxon was used in transition period between mungbean and rice and the transition period between wheat and mungbean. In Aman season, DS (BRRI dhan39) rice was sown on 20 July 2008 and harvested on 04 Nov 2008. After harvesting DS rice, wheat was sown on 17 Nov 2008 and harvested on 08 March 2009. Again mungbean was sown on 19 March 2009 after wheat harvest. Mungbean was harvested on 15-24 June 2009 and was followed by DS rice. Recommended management practices were followed for wheat, mungbean and rice cultivation.

Source of Information: Proceedings of the BRRI Annual Internal Research Review, 2008-09

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Weeding practice did not influence grain yield of wheat and mungbean. But rice yield was significantly influenced by hand weeding + herbicide practices than hand weeding only. Mungbean performed significantly better at permanent beds with 100% crop residue retention. Comparable grain yields of rice were obtained from conventional flat land and semi permanent beds without crop residue retention but significantly higher than that of permanent beds. Significantly higher grain yields of wheat was produced by permanent beds but identical to semi-permanent beds without crop residue on beds. The Rice equivalent yield (REY) of DS rice-wheat-mungbean cropping pattern was significant. 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