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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 Division, Bangladesh Rice Research Institute, Gazipur

SATYAN MANDAL
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:

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 which might be due to weed suppression effect of Sesbania 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).

Keywords: Intercropping, Grass pea, Sesbania, Maize, DS Aman, DS Aus, Cropping pattern

Location: BRRI, Gazipur

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Farming System

Non-commodity: Cropping pattern

Objectives:

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

Methodology:

The experiment was conducted during 2010-11 at the experimental farms, BRRI, 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 BRRI Annual Internal Review for 2011-12

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 142 g/m² grasspea biomass was added in the soil which may help to improve the fertility status of soil. In Aus season, brown manured plots gave significantly lower grain yield than that of selective herbicide and hand weeded plots. Higher weed infestation due to no weeding up to 40 DAS resulting lower grain yield in brown manured plots. Direct seeded Aus with two hand weeding gave highest grain yield 4.52 t/ha which was statistically similar with selective herbicide followed by hand weeding at 30 DAS. But it gave 27% higher grain yield than brown manured plot. In brown manured plots, on an average 138 g/m² biomass was added into the soil which may improve the fertility status of soil. In Aman season, post-emergence herbicide at 15 DAS followed by hand weeding at 30-35 DAS gave higher grain yield than only post-emergence herbicide at 15 DAS treated plot. 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 12.64 t/ha. In Aus season, weed density at 10 DAS in different treatments was similar. But, after 30 DAS weed density was higher in brown manured plots than others. It is might be due to no weeding in brown 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