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Effect of Sulphur and Ga3 on the Growth and Yield of Onion

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

Abstract/ Executive Summary:

An experiment was conducted at the Horticulture Farm of the Bangladesh Agricultural University, Mymensingh to evaluate the effects of sulphur and GA₃ on the growth and yield performance of onion cv. BARI Peaj-1. The experiment included four levels of sulphur viz., 0 (control), 15, 30 and 45 kg/ha and four concentrations of GA₃ viz., 0 (control), 50, 75, 100 ppm. The experimental findings revealed that sulphur and GA₃ had significant influence on plant height, number of leaves per plant, bulb diameter and length, individual bulb weight, splitted and rotten bulb, bulb dry matter content and bulb yield. The highest bulb yield (13.85 t/ha) was recorded from 30 kg S/ha, while the lowest bulb yield (11.20 t/ha) was obtained from control. Most of the parameters showed increasing trend with the higher concentration of GA₃. Application of GA₃ @ 100 ppm gave the maximum bulb yield (15.23 t/ha), while the minimum value (10.10 t/ha) was observed from control. Almost all the parameters were significantly influenced by combined treatments of sulphur and GA₃ except bulb length of onion. The maximum bulb dry matter content (13.50%) and bulb yield (17.10 t/ha) were produced from the application of sulphur @ 30 kg/ha with 100 ppm GA₃, while the minimum bulb dry matter content (9.23%) and bulb yield (9.33 t/ha) were recorded from control treatment of sulphur with GA₃.

Keywords: Onion, Sulphur, GA3, Growth, Yield, Quality

Location: Horticulture Farm, Bangladesh Agricultural University, Mymensingh

Start Date: 00-11-2007

End Date: 00-03-2008

Program Area: Crop-Soil-Water Management

Commodity: Onion

Objectives:

To find out the effects of sulphur and GA₃ on the growth, yield and quality of onion to optimum dose, equal distribution and maximum efficiency dose for achieving highest yield as well as quality.

Methodology:

The experiment was carried out at the Horticulture Farm of the Bangladesh Agricultural University, Mymensingh to examine the effects of sulphur and GA₃ on the growth and yield performance of onion cv. BARI Peaj-1 during the period from October, 2007 to March, 2008. The experimental site was medium high land belonging to the Old Brahmaputra Floodplain under the Agro-Ecological Zone 9 having non-calcareous darkgray flood plain soil. Four levels of sulphur viz., 0 (control), 15, 30 and 45 kg/ha and four concentrations of GA₃ viz., 0 (control), 50, 75, 100 ppm were used. The two-factor experiment was laid out in randomized complete bock design (RCBD) with three replications and altogether 16 treatment combinations in this experiment. Forty days old seedlings were soaked in different solutions of GA₃ concentrations for overnight and then transplanted on 15 December, 2007 at a spacing of 15 cm × 10 cm. The size of each unit plot was l.0 m x l.0 m. The spacing of plot to plot was 50 cm and block to block was 1.0 m. Sulphur was applied to different unit plots before planting of seedlings in the form of gypsum and then it was incorporated into the soil carefully. Other recommended dose of fertilizer (150-100-180 kg ha^-1 NPK) in the form of urea, triple super phosphate and muriate of potash was applied to grow the crop. Nitrogen was applied in two splits, the first along with phosphorus and potash at the time of soil preparation while the remaining half was applied as top dressed. Data on growth and yield parameters were recorded from ten randomly selected plants from each plot. Collected data were analyzed statistically using MSTAT computer program. The significance of difference between pair of means was tested by the least significant differences (LSD) test at 5% level of probability.

Source of Information: Progress. Agric. 21(1 & 2): 57 – 63, 2010 ISSN 1017-8139

Article Link (Online Journal): http://www.banglajol.info/bd/index.php/PA/article/view/16749/11785

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The experimental findings indicated that the treatment combination of sulphur @ 30 kg/ha and GA₃@ 100 ppm was more suitable for higher yield and quality of onion than the rest of the treatment combinations under the soil and climatic conditions of Mymensingh.

Knowledge Management: Journal