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Effect of Split Application of Nitrogen and Potash on the Growth and Yield of Onion

Md. Abdul Jalil
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 the Bangladesh Agricultural Untversity, Mymensingh during 1977-78 to study the effect of split application of nitrogen and potash on the growth and yield of onion. The rates of nitrogen and potash used in the experiment were 63.97 kg and 67.31 kg per hectare, respectivelv and were applied in different split combinations. The results showed that the split application of nitrogen and potash gave significantly higher yield than the entire dose at planting; and splitted doses with higher amount of nitrogen and potash at initial stages of growth seemed to be more appropriate for the higher yield of onion.

Keywords: Split Application, Nitrogen, Potash, Onion

Location: Horticulture Farm of the Bangladesh Agricultural University, Mymensingh

Start Date: 00-11-1977

End Date: 00-04-1978

Program Area: Crop-Soil-Water Management

Commodity: Onion

Objectives:

To find out the influence of split application of nitrogan and potash on the growth and yield of onion under the Agroclimatic condition of Mymensingh.

Methodology:

The experiment was conducted in the Brahmaputra alluvium soil of the Horticulture Farm of the Bangladesh Agricultural University, Mymensingh during the period from November, 1977 to April, 1978. The soil was sandy loam having pH value of 6.6. The seedling of a local variety of onion were raised in seedbeds. The seedlings of about 40 days old, and 8.10 cm in height were transplanted on 18th December, 1977. The rates of nitrogen and potash used in the experiment were 63.97 kg and 67.31 kg per hectare respectively. The amount of nitrogen and potash were splitted into If3rd and 2/3rd doses; and applied at different stages of growth i. e. at planting, after 30 days and 60 days of planting. The treatments used in the experiment were as follows : Treatments T₁ Control (no N and K), T₂ Entrie dose of N and K at planting, T₃ One third N and K at planting and two-third at 60 days of plantiny, T₄ Two-third N and K at planting and one- third at 60 days of planting, T5 One-third N and K at planting and two- third at 30 days of planting, T₆ One-third N and K at planting and two-third at 60 days of planting, T₇ Two-third N and K at planting and one- third at 60 days of planting, T₈ Two third N and K at planting and one third at 30 days of planting. In addition to nitrogen and potash as mentioned above, a basal dose of phosphate at the rate of 32.45 kg P₂O₅ per hectare was applied at the time of final preparation of land. Nitrogen, phosphate and potash were applied in the form of urea, triple super phosphate and muriate of potash respectively. The experiment was laid out in a randomized block design and there were 32 unit plots in four replications having the size of 1.83 m x 1.53 m each. The crop was harvested on the 12th April, 1978 when most of the leaves were dried out. Data on the number of leaves per plant, plant height and yield of bulb per plot were recorded and analyszed statistically.

Source of Information: Bangladesh Horticulture; 7(1&2), 1979

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 10,000/- ? 5 = 50,000/-

Total Budget (Tk.) :

Achievement/Findings:

The results showed that the split application of nitrogen and potash gave significantly higher yield than the entire dose at planting; and splitted doses with higher amount of nitrogen and potash at initial stages of growth seemed to be more appropriate for the higher yield of onion.

Knowledge Management: Journal