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Effect of Sowing Date on Germination and Vigour of Soybean (glycine Max (l.) Merr) Seeds

M. M. Rahman
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

M. M. Rahman
Willes Little Flower School and College, Dhaka, Bangladesh

M. M. Hossain
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

An experiment was carried out at the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh during three consecutive seasons in 2004-2006 to find out the effect of sowing date on physiological quality of soybean seed. The experiments included six sowing dates viz. 4 Nov, 24 Nov, 14 Dec, 3 Jan, 23 Jan and 12 Feb and two cultivars namely G-2 and PB-1 in Rabi 2004-05; four sowing dates viz. 25 Jul, 14 Aug, 3 Sept and 23 Sept and three cultivars namely G-2, PB-1 and BS-5 in Kharif II 2005; four sowing dates viz. 26 Nov, 16 Dec, 5 Jan, and 25 Jan, and two cultivars viz. G-2 and PB-1 in Rabi 2005-06. The experiments were conducted in split-plot design with three replications. Results revealed that cultivar G-2 had higher germination and vigour than cultivar PB-1 or BS-5 in all the three seasons. November and December sowing produced seeds with higher germination and vigour for all the cultivars in Rabi season. On the other hand, September sowing produced seeds with high germination and vigour during Kharif II. The study indicated that soybean seeds with high germination and vigour could be obtained by sowing during November to December in Rabi season and August to September in Kharif-II season.

Keywords: Soybean, Seed, Sowing date, Germination, Vigour

Location: Agronomy Field, Bangladesh Agricultural University, Mymensingh

Start Date: 00-00-2004

End Date: 00-00-2006

Program Area: Crop-Soil-Water Management

Commodity: Soybean

Objectives:

To investigate the effect of sowing dates on germination, vigour and field performance of soybean seed.

Methodology:

Three field experiments were conducted at the Agronomy Field, Bangladesh Agricultural University, Mymensingh during Rabi 2004-05, Kharif II 2005 and Rabi 2005-06 seasons to study the effect of sowing dates on germination and vigour of soybean seed. The site is located at the 24075/ North latitude and 90050/ East longitudes and at an altitude of 18 m. The soil of the site belongs to the Sonatala series of noncalcareous dark-grey floodplain soil under the Old Brahmaputra Floodplain Agro Ecological Zone, ‘AEZ-9’. The trial site was a medium high land having well drained silty loam soil with pH 6.8. The soil contained 1.50% organic matter, 0.073% total nitrogen, 12.0 ppm phosphorus, 9.5 ppm sulphur, 0.47 ppm zinc and 0.18% potassium. The soil test result revealed that the amount of P, K, S and Zn were relatively higher in Kharif-II season than those in Rabi season. The amount of total nitrogen was higher in Rabi season than in Kharif-II season. Germination of seed was assessed at the beginning and also at 9 months after storing using modified paper folding method. In this method, four replicates of 50 seeds were used. Fifty seeds randomly taken from the seed lot were placed on a double layer of moistened 23 cm × 23 cm (Bashundhara kitchen towel) germination paper. After placing the seeds, another layer of moistened paper was placed on the top of the seeds. Then the paper was carefully folded into a roll and the four rolls were placed in a plastic bag to prevent moisture loss during germination. Eight bags were kept upright in a 25 cm high of plastic container and were placed into the germination chamber. After 8 days, seedlings were evaluated for germination capacity and categorized into normal seedlings, abnormal seedlings and dead seeds, respectively. At the end of storage period, field emergence (%) of seed of each lot was evaluated by sowing 100 seeds in three replications in the well prepared field. The collected data were statistically analyzed and differences among the treatment means were adjudged by Duncan’s Multiple range Test with the help of a computer based statistical package program MSTAT-C.

Source of Information: The Agriculturists 11(1): 67-75 (2013) ISSN 2304-7321 (Online), ISSN 1729-5211 (Print), A Scientific Journal of Krishi Foundation

Article Link (Online Journal): http://banglajol.info/index.php/AGRIC/article/view/15245/10808

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Germination and vigour of soybean seed is influenced by the cultivar and their time of sowing. Among the three varieties, cultivar G-2 showed higher germination and vigour than cultivar PB-1 or BS-5 during both rabi and kharif seasons. November and December sowing produced seeds with higher germination and vigour for all the cultivars in Rabi season. On the other hand, September sowing produced seeds with high germination and vigour during Kharif II. The study concludes that soybean seeds having high germination and vigour could be obtained by sowing of seed during November to December and August to September in Rabi and Kharif-II seasons, respectively.

Knowledge Management: Journal