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Effect of Different Sowing Dates on the Yield and Yield Contributing Characters of Five Varieties of Rapeseed

M.H. Jahan
Seed Technologist
R&D Station, ACI Limited, Rural Development Academy, Bogra

Maarten Den Hertog
Project Coordinator
Seed Industry Promotion Unit/CDP, Khamarbari, Dhaka

Abstract/ Executive Summary:

An experiment was conducted at the R&D Farm of Rural Development Academy, Bogra, during the rabi season of 1996-97 to investigate the effect of different sowing dates on the yield and yield contributing characters of five rapeseed/mustard varieties. Five varieties of rapeseed/mustard were: Tori 7. Dhali, BARI Sarisha-8, Hyola-42 and Hyola-5 I were sown on 5 November, 20 November,5 December & 20 December 2000. Seed yield and yield contributing characters of rapeseed/mustard varieties decreased with delay in sowing dates. The highest seed yield was obtained on 5 November sowing which was significantly higher from those of other dates of sowing. The seed yield drastically reduced after 20 November sowing, Among the five varieties of rapeseed/mustard, BARI Sarisha-8 recorded the highest yield (1133 kg/ha) which was identically followed by Dhali, Hyola-5I and Hyola-42. Rapeseed/mustard can be sown between 5-20 November to get reasonable high yield in Level Barind Tract.

Keywords: Rapeseed. Sowing dates, Yield and yield contributing characters

Location: R&D farm of Rural Development Academy, Bogra

Start Date: 05-11-1996

End Date: 00-00-1997

Program Area: Crop-Soil-Water Management

Commodity: Mustard

Objectives:

To find out the effect of different sowing dates on the yield and yield contributing characters of five rapeseed/mustard varieties.

Methodology:

The study was carried out at the R&D farm of Rural Development Academy, Bogra during rabi season of 1996-97. The soil of the experiment site belongs to the Level Barind Tract (UNDP and FAO, 1988). The five varieties used were: Tori-7. Dhali, BARI Sarisha-8, Hyola-42 & Hyola-5. These varieties were sown on four different dates: 5 November, 20 November, 5 December & 20 December, 1996. The experiment was laid out in split plot design with three replications, having a unit plot size 4.5 m x 3.0 m. Different varieties were placed in the main plot whereas the dates of sowing were placed in the sub-plot. The distance between rows was 30 cm and plant to plant distance in a row was 5 crn. Manure and fertilizers were applied at the rate of 5 ton of well decomposed cowdung, 220 kg of urea, 140 kg TSP, 80 kg of MP, 150 kg of gypsum, 5 kg of zinc sulphate and 5 kg of borax per hectare, respectively. Cow dung was applied 10 days before final land preparation. Half of urea and all other fertilizers were applied as basal during final land preparation. Remaining urea was applied as top dressing at 25 clays after sowing. Weeding and thinning were done in the second week after emergence. Two irrigation were applied respectively 25 and 55 days after emergence. Data on yield and yield contributing characters were recorded from 10 randomly selected plants from each plot. Crops were harvested at different dates depending on maturity. Yield was recorded at 9% moisture. Data were analyzed the standard statistical procedure.

Source of Information: Bangladesh J. Train. and Dev.Vol. 16(1&2),2003: 53-56 ISSN 1013-0306

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Seed yield and yield contributing characters of rapeseed/mustard varieties decreased with delay in sowing dates. The highest seed yield was obtained on 5 November sowing which was significantly higher from those of other dates of sowing. The seed yield drastically reduced after 20 November sowing, Among the five varieties of rapeseed/mustard, BARI Sarisha-8 recorded the highest yield (1133 kg/ha) which was identically followed by Dhali, Hyola-5I and Hyola-42. Rapeseed/mustard can be sown between 5-20 November to get reasonable high yield in Level Barind Tract.

Knowledge Management: Journal