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Performance of Rapeseed Under Variable Row Spacing and Nitrogen Levels

M M Rahman
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M N Alam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M M Alam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

P K Sarma
Scientific Officer
Bangladesh Agricultural University Research System, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during November 2007 to March 2008 to study the effect of row spacing and level of nitrogen on the performance of rapeseed cv. BINA sarisa-4. The experimental included three row spacings viz., 15, 30 and 45 cm and four levels of nitrogen viz., 0, 50, 100 and 150 kg N/ha in a split plot design with three replications. Results showed that row spacing had significant effect on plant height, no. of branches plant^-1, no. of plants m^-2, no. of filled pods plant^-1, no. of pods m^-2, no. of seeds pod^-1, seed yield plant^-1, seed yield ha^-1, straw yield ha^-1 and harvest index but not on number of unfilled pods plant^-1, length of pod and 1000-seed weight. The highest seed yield (1.89 t/ha) was found in 30 cm row spacing and the lowest (1.53 t/ha) in 45 cm row spacing. The level of nitrogen also had significant effect on plant height, number of branches plant^-1, number of filled pods plant^-1, number of unfilled pods plant^-1, number of pods plant^-1, pod length, number of seeds pod^-1, seed weight plant^-1, 1000-seed weight, seed yield ha^-1 and straw yield ha^-1. The highest seed yield (2.41 t ha^-1) was found with 150 kg N ha^-1 and the lowest (0.83 t ha^-1) with no nitrogen plots. The interaction of row spacing and the level of nitrogen significantly influenced seed yield and related crop characters. The highest seed yield (2.63 t ha^-1) was obtained with the crop sown at 30 cm row spacing and applied with 150 kg N ha^-1.

Keywords: Rapeseed, Yield, Performance, Row spacing, Nitrogen

Location: BAU, Mymensingh

Start Date: 00-11-2007

End Date: 00-03-2008

Program Area: Crop-Soil-Water Management

Commodity: Mustard

Objectives:

To study the effect of row spacing and nitrogen level on the performance of rapeseed cv BINA sarisa-4.

Methodology:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from November 2007 to March 2008. The soil was sandy loam in texture with pH value 6.9 and low organic matter (0.463%). Three row spacing such as 15 cm, 30 cm and 45 cm and four level of nitrogen such as 0, 50, 100 and 150 kg N ha^-1 were used as treatment in the trial. The experiment was laid out in a split plot design with three replications. Row spacing was assigned in main plot and nitrogen in sub-plot. The unit plot size was 4.0 m × 2.5 m. One-third of urea as per treatment specification and full doses of TSP, MP, Gypsum were applied at the rate of 230, 140 and 200 kg/ha respectively at the time of final land preparation. The rest of the urea was applied as top dressing at 25 days after sowing (DAS) during flowering initiation stage. Seed of variety BINA sarisa 4 was sown in rows as per experimental specification at 2 cm depth with seed rate of 7.5 kg ha^-1 on 17 November 2007 in lines. Weeding was done twice at 12 and 20 DAS. Thinning was done in all the unit plots with care keeping a 5 cm plant to plan distance in rows. Only one irrigation was given at 25 DAS. The crop was sprayed with Malathion 60 EC @ 2 ml liter^-1 to prevent infestation of aphids at siliquae formation stage. Dithane M-45 @ 2 gm liter^-1 was also applied immediately after irrigation to prevent soft rot of plants. At maturity the experimental crop was harvested between 15 February to 14 March, 2008 when 80% of the siliquae turned straw yellowish colour. About 1.8 m² (90 cm × 120 cm) were harvested from the centre of each plot at ground level with the help of a sickle. The seeds thus collected were dried in the sun for reducing the moisture in the seed to about 9% level. The stovers were also dried in the sun. Seed and stover yield were recorded and converted into kg ha^-1. The data collected on different parameters were statistically analyzed to obtain the level of significance using the MSTAT-C computer package program. The mean differences among the treatments were compared by Duncans’s Multiple Rang Test (Gomez and Gomez, 1984).

Source of Information: Bangladesh J. Agriculturist. 3(1): 2009 ISSN 1812-4631

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the results, it may be concluded that mustard yield are affected by row spacing and nitrogen level. Sowing at 30 cm row spacing and application of 150 kg N ha^-1 could give the maximum yield (2.63 t ha^-1) of mustard variety BINA sarsa-4 under the agro climatic conditions of Mymensingh (AEZ-9).

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