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Effect of Seed Rate and Date on Yield and Yleld Components of Rapeseed

M. R. I. Mondal
Regional Agricultural Research Station Bangladesh Agricultural Research Institute, Jessore.

M.A. Islam
Regional Agricultural Research Station Bangladesh Agricultural Research Institute, Jessore.

Abstract/ Executive Summary:

An experiment was conducted at Regional Agricultural Research Station, BAR I, Jessore during rabi season, 1989-90 to find out optimum time of sowing and seed rate for higher yield of a newly selected Brassica napus genotype, Nap-3. There were four seeding dates (O::t.16, Nov. 1, Nov.15 and Dec. 1 ) and five seeding rates (4,6, 8,10, 12 kg/ha) in the experiment. Seeding rates significantly influenced number of branches/plant, numbers of seeds/siliqua, and seed yield/plant;but plant height, length of siliqua,and seed yield/ha were not significantly influenced by seed rate. Time of sowing significantly influenced plant height, number of siliqua/plant. number of seeds/siliqua, seed yield/plant, and seed yield/ha. The highest seed yield per hectare was obtained in plants sown on 15 October which was similar to that sown on 1 November.

Keywords: Brassica nspus L., Yield, Seed rate

Location: At Regional Agricultural Research Station, BARI, Jessore

Start Date: 00-00-1989

End Date: 00-00-1990

Program Area: Seed Technology

Commodity: Mustard, Mustard

Objectives:

To find out the optimum sowing time and seed rate for the newly selected genotype Nap-3.

Methodology:

The experiment was conducted during rabi season of 1989-90 at the Regional Agricultural Research Stat ion of Bangladesh Agricultural Research Institute, Jessore. The soils of experimental field belong to the Gopalpur Soil Series, which is characterized by calcareous Brown Flood Plain Soils having pH 7.0. There were four seeding dates (Oct. 15, Nov. 1, Nov. 15 and Dec. 1) and five seeding rates (4, 6, 8, 10, 12 kg/ha) in the experiment. The experiment was laid out in split plot design with seeding date in main plot and seeding rata in sub-plot. The experiment was replicated thrice The unit plot size was 5m X 3m. Fertilizers were applied at the rate of 1 38, 80, 60, 32, 4 kg/ha of N, P2 0 6 , K 2 0, Sand Zn, respectively in the form of Urea, Triple Super Phosphate, Muriate of Potash, Gypsum and Zinc sulphate. Half of the nitrogen and full amount of other fertilizers were applied final rand preparation. The remaining half of nitrogen was applied as top dressing on 22 days after seedling emergence. Seeds were sown in broadcast method according to the treatments. One weeding was done in the second week after emergence. Two irrigation were applied on 22 days and 5 5 days after emergence. Malathion was sprayed to control leaf eating cater pilfers and aphids. At maturity stage, ten randomly selected plants were uprooted from each plot for collecting data on yield and Its components. Cr ops harvested at different dates depending on maturity and data were collected on different characters.

Source of Information: Bangladesh J. Agril. Sci. 20 (1): 29-33; January, 1993 ISSN 0379-4296

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Seeding rates significantly influenced number of branches/plant, numbers of seeds/siliqua, and seed yield/plant;but plant height, length of siliqua,and seed yield/ha were not significantly influenced by seed rate. Time of sowing significantly influenced plant height, number of siliqua/plant. number of seeds/siliqua, seed yield/plant, and seed yield/ha. The highest seed yield per hectare was obtained in plants sown on 15 October which was similar to that sown on 1 November.

Knowledge Management: Journal