Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Effect of Tillage Systems and Timing of Weed Control on Weed Flora and Yield of Mung Bean (2018--2019)

M. A. ISLAM
Pules Research Centre, RARS, BARI, Ishurdi, Pabna

M. O. ALI
Pules Research Centre, RARS, BARI, Ishurdi, Pabna

J. HOSSAIN
Pules Research Centre, RARS, BARI, Ishurdi, Pabna

R. U. CHOUDHURY
Pules Research Centre, RARS, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

A field experiment was conducted at Pulses Research Centre (PRC) and Regional Agricultural Research Station (RARS) during Kharif season of 2018 to determine the critical period for weed competition during mung bean growth under different crop establishment options. Studies on weed dynamics in mung bean sown under two tillage systems were conducted at Pulses Research Centre Ishurdi, Pabna, Bangladesh. A commonly grown mung bean cultivar, BARI Mung - 6’ was sown on 27th March of 2018 under strip planting system (SP) and conventional tillage (CT) and it was subjected to different durations of weed competition [weeding at 15, 30, and 45 days after sowing (DAS) and season-long weed competition]. Season-long weed-free plots (7 times weeding) were maintained under each tillage system for comparison. The broad-leaved and sedge weed densities were higher under season-long weed competition (43 m^-2 and 138 m^-2) compared to weed-free at 45 DAS (34 m-² and 112 m-2), 30 DAS (30 m-2 and 97 m^-2) and 15 DAS (17 m^-2 and 91 m^-2). However, the maximum grassy weed density was recorded in SP plots under the season-long weed competition (475 m-²) and the lowest in CT plots under weed-free at 15 DAS (113 m-²). The seed yield was significantly higher in the plots of season-long weed-free (1.24 t/ha) while the lowest yield (0.83 t/ha) was recorded in plots under season-long weed competition. The seed yield loss relative to season-long weed-free plots was higher in plots under season-long weed competition (32 %) followed by the plots under weed-free at 45 DAS (29 %) and 30 DAS (20 %), and the lowest in weed-free at 15 DAS (5 %). The results suggest that weeding at 15 DAS was effective in controlling weed and minimizing yield losses of mung bean compared with delayed weeding and longer durations of weed competition.

Keywords: Agro-Ecological Zone, Mungbean, Weed.

Location:

Start Date: 00-00-2018

End Date: 00-00-2018

Program Area: Crop-Soil-Water Management

Commodity: Weed management, Mungbean

Objectives:

This experiment has been undertaken to determine the critical stage of weed competition and optimum sowing time on the performance of mungbean.

Methodology:

The study was conducted at the Pulses Research Centre, Ishurdi, Pabna, Bangladesh. The soil of the experimental site belongs to Agro-Ecological Zone – 11 (High Ganges River Flood Plains). The initial soil properties were homogenous. The mean annual rainfall was about 1200 ± 300 mm. The experiment was conducted during the Kharif-1 season (pre-monsoon season) of 2018 and comprised of two factors – crop establishment method (CE): strip planting (SP) and conventional tillage (CT) and – durations of weed competition (WC): 15, 30 and 45 (DAS). Season-long weed competition (weedy check) and weed-free plots were also maintained for comparison. Conventional tillage was accomplished by cultivating the soil thrice with a power tiller followed by laddering each time. Sowing in the SP plots was performed using a Versatile Multiple-crop Planter into an undisturbed seedbed in a single pass operation. The treatment factors were arranged in a split-plot design with tillage practices as the main plots and the durations of weed competition as the subplots and replicated four times in plot sizes of 30 m². In total, there were 30 experimental units during both years. The previous crop was lentil in the plot. Glyphosate was applied in both SP and CT plots before 48 hours of mungbean sowing. BARI Mung-6 was used for mungbean crop. The recommended nutrient such as nitrogen, phosphorus and potassium @ 20-40-20 kg/ha were applied as basal dose at final land preparation. The seeds were sown maintaining a line spacing of 30 cm. The seed rate of mungbean was used 30 kg/ha for both SP and CT. Except for weed management, similar agronomic management practices were done as per requirement for all the treatments. Fungicide, insecticide and pesticide were applied as per the requirement to control disease, pest and insect if any. Data were recorded for grain and straw yield, plant height, number of pods per plant, pod length, number of seeds per pod and 1000 grain weight. Data were analyzed statistically using R software. The GenStat 17^th Edition and R-software package were used for all statistical analyses. The mean differences between treatments were separated by the least significant difference (LSD) at P≤ 0.05 for the measured variables.

Source of Information: Annual Research Report 2018-2019,Pules Research Centre, RARS, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The plant height was significantly affected by the duration of weed competition. The tallest plants counted in WF 15 (62.73 cm) while the shortest plants in WF SL (55.30). The pods/plant was not significantly affected either by the duration of weed competition or the crop establishment method. The pod length was significantly affected by the crop establishment method. The pod length was higher (8.39 cm) in SP while lower in CT (7.71 cm). The seeds/pod was not significantly affected due to the duration of weed competition or crop establishment method. The grain yield of mungbean was affected by the duration of weed competition, the grain yield of mungbean under WF SL and WF 15 DAS were 33 % and 30 % higher than that under control. The plant height was significantly affected by the duration of weed competition. The tallest plants counted in WF 15 (62.73 cm) while the shortest plants in WF SL (55.30). The pods/plant was not significantly affected either by the duration of weed competition or the crop establishment method. The pod length was significantly affected by the crop establishment method. The pod length was higher (8.39 cm) in SP while lower in CT (7.71 cm). The seeds/pod was not significantly affected due to the duration of weed competition or crop establishment method. The grain yield of mungbean was affected by the duration of weed competition, the grain yield of mungbean under WF SL and WF 15 DAS were 33 % and 30 % higher than that under control. The yield loss (%) was not significantly different due to different crop establishment methods while significantly different by the durations of weed competition. The yield loss (%) was higher (32.36 %) in the control plot where there was no weeding. However, there was no yield loss in the WF SL treatment. Compare to control, the yield loss (%) was minimum (4.98 %) in WF 15 DAS and it gradually increased in WF 30 DAS and WF 45 DAS. The number of broad-leaved weed/m² was not significantly different due to different crop establishment methods. The weed was totally controlled from a season-long weed-free plot. Among other treatments, the broad-leaved weed was highest in the controlled plot (43.20/m²) while lowest in WF 15 DAS (16.70/m²) plot followed by WF 30 DAS (29.80/m²) and WF 45 DAS (34.00/m2). Similar to broad-leaved weed/m2, the number of sedges/m² were not significantly different due to different crop establishment method (Table 2.25). The weed was totally controlled by a season-long weed-free plot. Among other treatments, the sedges/m² weed was highest in the controlled plot (138.30/m²) while lowest in WF 15 DAS (91.20/m²) plot followed by WF 30 DAS (97.00/m2) and WF 45 DAS (112.00/m2). The grassy weed density was higher in SP in comparison to CT regardless of crop establishment methods. The weed was fully controlled from a season-long weed-free plot. Among other treatments, the highest grassy weed density was found in the controlled plot under SP treatment (475.30/m²) while the lowest in WF 15 DAS under CT treatment (112.70/m²) plot.

Knowledge Management: Report/Proceedings