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Response of Mungbean to Integrated Nitrogen and Weed Managements

Shamima Sultana
Department of Agronomist, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Jafar Ullah
Department of Agronomist, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Fazlul Karim
Department of Agronomist, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Asaduzzaman
Department of Agronomist, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted at the experimental field of the Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka to evaluate the effect of nitrogen and weed managements on mungbean (Vigna radiata L.) during the period from March 2007 to June 2007. Different managements of nitrogen (0, 20 kg N ha^-1 at vegetative, 20 kg N ha^-1 at vegetative and flowering) and weeding (No weeding, one weeding at vegetative, two weeding at vegetative and flowering stage) were integrated. Results showed that application of 20 kg N ha^-1 as basal + 20 kg N ha^-1with one weeding at vegetative stage showed significantly higher values of all growth parameters like number of leaflets (24.27 at 20 DAS and 24.27 at 40 DAS), leaf area (23.27 cm² at 20 DAS and 102.17 cm² at 40 DAS), leaf dry weight (0.30, 6.99 and 10.61gm at 10, 17 and 24, DAS respectively) and shoot dry weight (2.76 and 4.69 gm at 17 and 24 DAS, respectively). This treatment also produced significantly more number of branches (1.67), pods plant^-1(17.83) and seed yield ha^-1 (1982.05 kg).

Keywords: Nitrogen, Weeding and Vegetative stage

Location: Agronomy Field of Sher-e-Bangla Agricultural University, Dhaka.

Start Date: 00-03-2007

End Date: 00-06-2007

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

To maximize seed yield using optimum nitrogen dose with optimum weed management.

Methodology:

The experiment was conducted at the Agronomy Field of Sher-e-Bangla Agricultural University, Dhaka during the summer season of March to June, 2007. The experimental field is located at 23° 77' latitude and 90° 33' E longitude at an altitude of 9 m above the mean sea level. The soil belongs to the Agro-ecological Zone - Modhupur Tract (AEZ 28). The land topography is medium high and soil texture is silt loam with pH 8.0. The climate of the locality is subtropical which is characterized by high temperature and heavy rainfall during kharif season (March-September) and scanty rainfall during Rabi season (October-March) associated with moderately low temperature. Twelve treatments were comprised viz. T₁=No nitrogen and no weeding (Control), T₂ = No nitrogen + one weeding at vegetative stage, T₃ = No nitrogen + two weeding (First weeding at vegetative stage& 2^nd weeding at flowering stage), T₄ = 20 kg N/ha as basal with no weeding, T₅= 20 kg N/ha as basal + one weeding at vegetative stage, T₆ = 20 kg N/ha as basal + two weeding (First at vegetative stage & 2^nd at flowering stage), T₇ = 20 kg N/ha as basal + 20 kg N/ha as split at vegetative stage with no weeding, T₈= 20 kg N/ha as basal + 20 kg N/ha as split at vegetative stage with one weeding, T₉ = 20 kg N/ha as basal + 20 kg N/ha as split at vegetative stage + two weeding (I^st at vegetative stage 2^nd at flowering stage), T₁₀ = 20 kg N/ha as basal + 20 kg N/ha as split at vegetative + 20 kg N/ha as split at flowering stage with no weeding, T₁₁ = 20 kg N/ha as basal +20 kg N/ha as split at vegetative stage + 20 kg N/ha as split at flowering stage + one weeding at vegetative stage and T₁₂ = 20 kg N/ha as basal + 20 kg N/ha as split at vegetative stage + 20 kg N/ha as split at flowering with two weeding (1^st at vegetative stage and 2^nd at flowering stage). The variety of mungbean used for the study was BARI mung-6. The experiment was laid out Randomized complete block design (RCBD) with three replications. Urea, Triple Super Phosphate (TSP) and Muriate of Potash (MP) were used as a source of nitrogen, phosphorus and potassium, where nitrogen was applied as per treatment and P₂P₅ and K₂0 were applied as basal at the rate of 48 and 33 kg ha^-1 respectively for all plots. The seeds treated with Bavistin before sowing and seeds were sown 28 march, 2007. The seeds were sown in solid rows keeping 30 cm between two rows. Thinning was done at 10 days after sowing and 15 days after sowing to maintain plant population in each plot as around 333333 plants ha^-1. Weeding was down as per treatments. Ten plants from each were randomly selected for data weight, pods plant^-1, seeds pod^-1 and 1000 seed weight. Data on yield kg ha^-1 was collected at harvest from pre demarcated three linear lines of each plot. The recorded data were then statistically analyzed to obtain the level of significance using MSTAT- computer package program. The means were separated of following Duncan's Multiple Range Test (DMRT).

Source of Information: American-Eurasian Journal of Agronomy 2 (2): 104-108,2009, ISSN 1995-896X

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the results, it may be concluded that mungbean gave maximum production of yield during summer season when treated with 20 kg N/ha as basal + 20 kg N/ha as split at vegetative stage and was provided with one wedding at vegetative.

Knowledge Management: Journal