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Effects of Spacing and Age of Seedling on the Growth and Yield of Summer Onion

M.A. Latif
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202

M.S.H. Choudhury
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202

M.A. Rahim
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202

M.K. Hasan
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

B.K. Pal
Department of Agricultural Extension Education, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

An experiment was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh, during the period from February, 2006 to June, 2006 to study the effect of plant spacing and age of seedling on the growth and yield of summer onion. There were three levels of plant spacing viz. 20 x 20 cm, 20 x 15 cm and 20x10 cm and four levels of age of seedling viz. 35 days 40, days 45 days and 50 days. The experiment was laid out in Randomized Complete Block Design (RCBD) with 3 replications. The plant spacing showed significant effects on most of the parameters studied. Wider spacing gave the highest diameter and weight of bulb; but the closer spacing produced highest yield of bulbs (9.40t/ha). The age of seedling also significantly influenced the growth, yield components and yield of bulb. The highest bulb yield (8.85t/ha) was produced by 50 days old seedlings and the lowest (4.13t/ha) was in 35 days old seedlings. The combined effect of plant spacing and age of seedling demonstrated a significant variation in fresh weight of bulb (ranging from 6.58 to 28.58 g) and yield (ranging from 1.61 to 13.43 t/ha). The highest yield (13.43t/ha) was found in the treatment combination of 20 x 10 cm plant spacing with 50 days old seedlings.

Keywords: Spacing, Age, Seedling, Growth, Yield, Onion.

Location: Farm of Bangladesh Agricultural University, Mymensingh

Start Date: 00-02-2006

End Date: 00-06-2006

Program Area: Crop-Soil-Water Management

Commodity: Onion

Objectives:

1. To investigate the effect of plant spacing and age of seedling on the performance of yield and quality of summer onion.

Methodology:

The experiment was conducted in the field of USDA Allium project and laboratory of the Fruit Tree Improvement Project (FTIP) at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh during the period from February to June, 2006 to study the effect of plant spacing and age of seedling on the growth and yield of summer onion. The experiment was conducted to study the growth, yield and storage of onion cv. BARI Pieaz-2 as influenced by different spacing and age of seedling. The spacing 20 x 20 cm (S₁), 20 x 15 cm (S₂), 20 x 10 cm (S₃) and age of seedling were 35 days (A₁), 40 days (A₂), 45 days (A₃) and 50 days (A₄). The two factor experiment having 12 different treatment combinations was laidout in a Randomized Complete Block Design (RCBD) with 3 replications. The size of each unit plot was 1 m x 1 m, the space between two plots was 30 cm and that between blocks was 50 cm. Data were recorded from the sample plants during the course of experiment. Five plants were selected randomly from each plot in such a way that the border effect was avoided for the highest precision. For this, the outer two rows and the outer plants of the inner rows were avoided. The height and number of leaves of the 5 selected sample plants from each plot was measured after 15 days of transplanting and then at 15 days interval up to 60 days of transplanting. After harvesting fresh foliage of five selected plants was weighed in gram and their average was taken as fresh weight of foliage per plant. The percentage of bulb dry matter content was calculated by the following formula., % Dry matter content of bulb = (Constant dry weight of bulb/Fresh weight of bulb) x 100. The collected data on various parameters under study were analyzed to find out the statistical significance of the experimental results. The means of all the treatments were calculated and analyses of variance for all the characters were performed by F test. The significance of the difference among the means was evaluated by Least Significant Difference Test (LSD).

Source of Information: J. Agrofor. Environ. 3 (2): 129-133, 2010; ISSN 1995-6983

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Funding Source:

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Achievement/Findings:

The yield of bulbs was also significantly influenced by the combined effect of plant spacing and age of seedlings. The highest yield of bulbs (13.43t/ha) was observed at the spacing of 20 x 10 cm with 50 days old seedlings followed by 20 x 10 cm plant spacing with 45 days old seedlings (10.14 t/ha). The lowest yield (1.16 t/ha) was found in plants grown at 20 x 20 cm spacing with 35 days old seedlings.

Knowledge Management: Journal