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Effect of Row Spacing and Different Combinations of N-p-k Fertilizer on the Yield of Onion

Sabya Sachi Sen Gupta
Department of Agronomy, Bangladesh Agricultural University, Mymensingh.

M. Abdul Gaffar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh.

Abstract/ Executive Summary:

All experiment was conducted to study the effect of different row spacings under different combinations of nitrogen, phosphorus and potassium Oil the growth and yield of onion. Row spacings (15, 20 and 25cm) did not produce any significant difference on the vegetative development of the plants. There was an increasing trend of bulb yield with closer spacing. Application of NPK exerted a significant effect on the yield and yield contributing characters of onion. However, the response of the fertilizer was significant only upto the level of N₄₅, P₃₆, K₃₆ kg/h. But for closer planting wih highest dose of NPK (69-54-54) was the best.

Keywords: Row spacings, Different combinations, NPK fertilizer, Yield, Onion

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-01-1979

End Date: 00-04-1979

Program Area: Crop-Soil-Water Management

Commodity: Onion

Objectives:

To study the effect of row spacings and different combinations of N-P-K fertilizer on the growth and yield of onion.

Methodology:

The experiment was carried out to the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh during the period from January to April, 1979. The field belonging the Old Brahmaputra Alluvial Soil Tract was a medium high land with sandy loam soil that showed a pH of 6.6. Forty two days old seedlings of a local onion cultivar were transplanted on January 16, 1979. There were 3 row-to-row spacings and 4 levels of N-P-K fertilizer in the experiment. The spacings were 15, 20 and 25cm and the levels of N-P-K were 0-0-0, 23-18-18, 46-36-36 and 69-54-54 kg/ha. The N-P-K nutrients were supplied through urea, triple super-phosphate and muriate of potash respectively. A constant plant to plant spacing of 10cm was maintained. The experiment- was laid out in split plot design. The treatment on row spacing and N-P-K levels were placed at random in the main and unit plots respectively. The treatments were replicated four times. The net area of each unit plot was 5.95 sq.m. The total amount of triple super-phosphate, muriate of potash and half on the urea were applied to the soil one day prior to transplanting the seedlings. The rest amount of urea was applied as top dressing in two installments on 30 and 50 days after transplanting. All the treatments received identical cultural operations including three hand weeding and three irrigation. The crop was harvested on April 20, 1979. The data collected on different yield and yield contributing characters were statistically analyzed and significance of the mean difference was adjudged by Duncan's New Multiple Range Test.

Source of Information: Bangladesh Horticulture, 8(2):08-12,1980

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The row spacing and N-P-K fertilizer did not show significant interaction effect in any of the crop characteristics studied. The closest row spacing (15cm with the highest dose of N-P-K (69.54.54kg/ha) gave the maximum yield of onion bulbs (11.03kg per unit plot, which is equivalent to 18.5 t/ha). Application of NPK exerted a significant effect on the yield and yield contributing characters of onion. However, the response of the fertilizer was significant only upto the level of N₄₅, P₃₆, K₃₆ kg/h. But for closer planting highest dose of NPK (69-54-54) was the best. The result suggests that for the production of onion bulbs a high density planting may be advantageous only if a high dose of plant nutrient is supplied.

Knowledge Management: Journal