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Effect of Bradyrhizobium Inoculum at Different Nitrogen Levels on Summer Mungbean

S.N. Mozumder
Agricultural Research Station, Raikhali, Chandraghona, Rangamati Hill District, Bangladesh.

M. Salim
Department of Agronomy, Bangladesh Agricultural University, Mymensingh, Bangladesh.

N. Islam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh, Bangladesh.

M.I. Nazrul
Hill Agricultural Research Station, BARI, Khagrachari, Bangladesh.

M.M. Zaman
Hill Agricultural Research Station, BARI, Khagrachari, Bangladesh.

Abstract/ Executive Summary:

Experiment was conducted to study the effect of Bradyrhizobium inoculation at different nitrogen levels viz. 0, 20, 40, 60 and 80 kg N ha^-1 on Binamoog-2. Bradyrhizobium inoculation increased dry matter production, nodulation, pod production, seed yield, harvest index and benefit cost ratio. Nitrogen negatively affected on nodulation and harvest index. Increase of nitrogen fertilizer increased seed yield up to 40 kg N ha^-1 and straw yield up to 60 kg N ha^-1. Highest seed yield (1607 kg ha^-1) and benefit cost ratio (2.35) obtained when 40 kg N ha^-1 was applied with Bradyrhizobium inoculation.

Keywords: Bradyrhizobium, Inoculum, Nitrogen, Summer Mungbean

Location: Agronomy field Laboratory, BAU, Mymensingh

Start Date: 00-03-1994

End Date: 00-06-1994

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

i) To find the effect of nitrogen and Bradyrhizobium on Binamoog-2.

ii) To find the optimum level of nitrogen with Bradyrhizobium inoculation for higher yield and profit.

Methodology:

The experiment was laid out in a split plot design with three replications assigning Bradyrhizobium inocula in main plots and nitrogen in sub plots at the Agronomy field Laboratory, BAU, Mymensingh during March to June, 1994. A liquid mixture of three Bradyrhizobium inocula i.e. BINA MB 441, BINA MB 169,BfNA MB 301 and five levels of nitrogen i.e. 0, 20, 40, 60 and 80 kg-N ha^-1 were included in the experiment. The unit plot size was 4.0x2.5M². Fertilizers were applied @ 60 kg P₂0₅ and 30kg K₂0 from triple super phosphate and muriate of potash respectively. Liquid mixture of three Bradyrhizobium inocula was mixed with the seeds before sowing and nitrogen was applied in the form of urea following the treatments of the experiment at the time of fertilizer application. Seeds were sown on March 12, 1994 maintaining 40 cm line to line and 10 cm plant to plant spacing. Data on nodulation and dry matter production was collected at 60 days after sowing. At 80% maturity of pods, the crop was harvested on June 12, 1994 and data on plant height, number of branch/plant, number of pods plant^-1, number of seeds pod^-1, 1000 seeds weight, seed and straw yield etc. were taken and subjected to statistical analysis following the M-stat programmed. Duncan's multiple range test was done as and when necessary.

Source of Information: Asian Journal of Plant Sciences, 2(11): 817-822, 2003; ISSN: 1682-3974

Article Link (Online Journal): http://scialert.net/qredirect.php?doi=ajps.2003.817.822&linkid=pdf

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the present investigation it could be concluded that 40 kg N ha^-1 with Bradyrhizobium inoculation was the most suitable and profitable dose of nitrogen for old Brahmaputra terrace soil (BAU Campus).

Knowledge Management: Journal