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Effects of Planting Time and Nitrogen on Growth and Yield of Onion

M. S. Alam
Department of Horticulture, Bangladesh Agricultural University, Mymensingh, Bangladesh.

M. F. Mondal
Department of Horticulture, Bangladesh Agricultural University, Mymensingh, Bangladesh.

Abstract/ Executive Summary:

The experiment consisted or two planting times and 4 levels or nitrogen and two varieties of summer onion. The highest yield of 11.32 tonnes/ha was obtained from II April planting. The variety BARI Piaz-2 produced higher yield (9.0 t/ha) than BARI Piaz-3 (7.92 t/ha) The highest bulb yield (9.55 t/ha) was produced by the application of nitrogen @ 92 kg/ha. Delayed planting reduced the yield significantly. The yield of bulb was found to be increased with increasing level of N up to 92 kg N/ha while it decreased beyond this level. The interaction as well as the combined effects or planting time. variety and nitrogen were statistically significant. The treatment combination 11 April planting x BARI Piaz-2 x 92 kg N/ha produced the highest bulb yield (13.80 t/ha).

Keywords: Allium cepa L., Planting time, Nitrogen, Variety. Yield

Location: Spices Research Centre, Bangladesh Agricultural Research Institute (BARI), Bogra.

Start Date: 00-02-2002

End Date: 00-07-2002

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Onion

Objectives:

To evaluate the effects of planting time and nitrogen doses on the growth and yield of two varieties of summer onions.

Methodology:

The experiment was conducted at the Spices Research Centre, Bangladesh Agricultural Research Institute (BARI), Bogra during the period from February to July 2002 to evaluate the effects of planting time and nitrogen on the growth and yield of summer onion. The amount of organic C, total N, available P and available K were 0.512%, 0.044%, 25.00 ppm and 0.111 ppm per 100g soil, respectively. The seeds were sown in the seedbed according to planting times on 26 February 2002 for the first planting and 29 March 2002 for the second planting. The selected land was ploughed with the help of power tiller and fertilized at the rate of 5 tons of cowdung, 275 kg TSP, 150 kg MP, 110 kg Gypsum, 3 kg/ha ZnO. The whole amount of cowdung was applied immediately after opening the land and total amount of TSP, MP, Gypsum, and ZnO were applied during the final land preparation. Urea was applied as the source of nitrogen. Half of urea was applied in plot soil after final land preparation and the rest of urea was applied as top dressing installment at 20 days of transplanting by treatment wise. The experiment consisted of three-factors: viz., two planting time (11 April and 12 May) viz., two summer onion varieties (BARI Piaz-2 and BARI Piaz-3) and viz .. four levels of nitrogen (0, 46, 92, 138 kg/ha), and was laid out in randomized complete block design (RCBD) with three replications. The size of unit plot was 1.2 x I m. Forty five days old healthy seedlings were selected and transplanted on 11 April and 12 May 2002 in the field at 15 x 10 cm spacing. The crop was harvested on 22 June and 23 July 2002. The data obtained on yield, fresh weight, diameter, types, dry weight per bulb and yield per plot and yield per hectare. The collected data were analyzed by ANOVA method. The means of different parameters were compared by Least Significant Difference (LSD) test.

Source of Information: Progress. Agric. 14(1 & 2) : 11-14,2003, ISSN 1017-8139

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The yield of bulb was found to be increased with increasing level of N up to 92 kg N/ha while it decreased beyond this level. The interaction as well as the combined effects or planting time. variety and nitrogen were statistically significant. The treatment combination 11 April planting x BARI Piaz-2 x 92 kg N/ha produced the highest bulb yield (13.80 t/ha).

Knowledge Management: Journal