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Evaluation of Intercropping Grass Pea in Maize and Sesbania in Aus in Maize-ds Aus-ds Aman Cropping Pattern

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

Mahbubur Rahman Dewan
Scientific Officer
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur-1701

Dr M Harunur Rashid
Senior Scientific Officer
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur-1701

Satyen Mondal
Scientific Officer
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur-1701

Abstract/ Executive Summary:

Only selective herbicide at 15 DAS is sufficient for Aman rice production in Maize-DS Aus (brown manured)-DS Aman cropping pattern. One hand weeding was saved in Aman season may be due to weed suppression effect of Sesbania which was incorporated during Aus season. Maize intercropped with grasspea-DS Aus with herbicide followed by 1 hand weeding-DS Aman with herbicide followed by 1 hand weeding gave highest rice equivalent yield (REY) which was 12.02 t/ha.

Keywords: Intercropping, Cropping pattern, Grasspea, Maize, DS Aus, DS Aman

Location: BRRI Farm, Gazipur

Start Date: 01-07-2010

End Date: 30-07-2011

Program Area: Farming System

Non-commodity: Rice, Intercropping

Objectives:

To identify the suitable crop management packages for Maize-DS Aus-DS Aman cropping pattern.

Methodology:

The experiment was conducted during 2009-10 at the experimental farms, Gazipur. The tested cropping pattern was Maize-DS Aus-DS Aman. The experiment was designed in a RCB design with three replications. Along with sole maize treatment grasspea was intercropped with maize and incorporated at 25 December during earthing up of maize. Grasspea seeding was done in between maize rows at the time of maize seeding. Before incorporation, grasspea biomass was collected from 50×50 cm² area. Direct seeded Aus was cultivated with different management options, viz. Sesbania intercropped with DS Aus rice and brown manured applying 2,4-D ethyle easter at 30 DAS (Seeding was done in between DS Aus rows at the time of Aus seeding) + one hand weeding at 40 DAS, selective herbicide (Sunrise Super) at 15 DAS followed by hand weeding 30-35 DAS and two hand weeding at 15 and 30-35 DAS. Sesbania biomass was collected from 50×50 cm² area before brown manuring. Direct seeded Aman was cultivated with post-emergence herbicide (Sunrise Super) at 15 DAS followed by hand weeding at 30-35 DAS and post-emergence herbicide (Sunrise Super) at 15 DAS. Weed density and dry matter was collected at 15, 30 and 45 DAS from 50×50 cm² area both in Aus and Aman season. Prior to start the experiment, soil of the experimental plots was analyzed to know the initial fertility status by collecting samples from two depths of 0-15 cm and 15- 30 cm.

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:

There was no significant difference in yield between sole maize and grasspea intercropped maize. But in case of intercropped maize, on an average 148.41g/m² grasspea biomass was added in the soil which may help to improve the fertility status of soil. In Aus season, there was no significant difference in grain yield among different treatments. In brown manured plots, grain yield was lower than that of selective herbicide and hand weeded plots. Higher weed infestation due to no weeding upto 40 DAS resulting lower grain yield in brown manured plots. In Aman season, there was no significant difference in grain yield between the treatments. Post-emergence herbicide at 15 DAS followed by hand weeding at 30-35 DAS is already recommended for direct seeded Aman rice. But from the result of this study, it may be concluded that only selective harbicide at 15 DAS is sufficient for Aman rice production in Maize-DS Aus-DS Aman cropping pattern. It may be due to weed suppression effect of Sesbania which was incorporated during Aus season. Maize intercropped with grasspea-DS Aus with herbicide followed by 1 hand weeding-DS Aman with herbicide followed by 1 hand weeding gave highest rice equivalent yield (REY) which was 12.02 t/ha. In Aus season, weed density at 10 DAS in different treatments was similar. But, after 30 DAS weed density was higher in browned manured plots than others. It is may be due to no weeding in browned manured plots upto 40 DAS. After 45 DAS, there was no significant difference in weed density in different treatments. In Aman season, weed density at 10 and 30 DAS in different treatments was similar. But at 45 DAS weed density was higher only herbicide applied plots than herbicide followed by one hand weeding.

Knowledge Management: Report/Proceedings