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Effect of Different Levels of Nitrogen and Potash on the Yield of Onion

Md. Abdus Sattar
Department of Horticulture, Bangladesh Agricultural University, Mymensingh.

Md. Azizul Haque
Department of Horticulture, Bangladesh Agricultural University. Mymensingh.

Abstract/ Executive Summary:

An experiment was conducted at Bangladesh. Agricultural University, Mymensingh during 1974-75 to study the effects of nitrogen and potash on the yield of onion. Nitrogen applied at the rate of 67.2 kg/ha was found to be the optimum economic dose for higher yield. Increasing dose of potash above 22'5 kg/ha did not increase the yield. Splitted application of fertilizer doses gave higher weight of bulbs than the single application.

Keywords: Onion, Yield, Fertilizer

Location: Bangladesh Agricultural University, Mymensingh.

Start Date: 00-11-1974

End Date: 00-04-1975

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To find out an optimum dose of nitrogen and potash and the suitable method of fertilizer application for a local onion variety which is commonly grown in Mymensingh and many other parts of Bangladesh.

Methodology:

The experiment was conducted in the Horticulture Farm of Bangladesh Agricultural University, Mymensingh during the period from November, 1974 to April, 1975. The seedlings of a local variety of onion were raised in beds. The seeds were obtained from the National Seed Store. Mymensingh. The seedlings were trans- planted in the experimental, plots at the age of six weeks when they attained the height of 7-10 cm. Urea ( 46% N) and muriate of potash (60% K₂0) were used al the sources of nitrogen and potash respectively. In addition to these, cowdung at the rate of 4'60 ton per hectare was. applied at the time of land preparation Five levels of nitrogen, 16'80, 33'60, 50'40, 67'21 and 84'01 kg. per hectare and four levels of potash, 22'48, 44'72. 67'21 and 89'70 kg. per hectare were used in different combinations with one treatment as control. The fertilizer doses were applied in two methods, namely, single and splitted .application, Total dose per unit plot was applied one week after transplantation. In splitted application, one half was applied at the time when the total doses were applied and second half was app- lied four weeks after the first. The fertilizers were used as top-dressing. The experiment was laid out in n complete split-plot design with fertilizer treatments as the main factor. The treatments were replicated four times. The crop was harvested on 4th April, 1975 when most of the leaves started drying.

Source of Information: Bangladesh Horticulture, Vol-3(2): 33-36,1975

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Nitrogen applied at the rate of 67.2 kg/ha was found to be the optimum economic dose for higher yield. Increasing dose of potash above 22'5 kg/ha did not increase the yield. Splitted application of fertilizer doses gave higher weight of bulbs than the single application.

Knowledge Management: Journal