Abstract
The experiment was conducted at the field laboratory of the Patuakhali Science and Technology University, Patuakhali, Bangladesh during the period from November, 2011 to March 2012 under the tidal Floodplain region to find out optimum sowing time for the selected three cultivars (BARI Sharisha-15, BINA Sharisha-5 and BARI Sharisha-9). There were four sowing dates viz. 30 November, 15 December, 30 December and 15 January. Significant variations due to different sowing dates were observed in plant height, total dry matter, leaf area index, number of siliqua plant-1, seeds silique-1, 1000-grain weight, grain yield and HI. Results showed that the highest grain yield (1.73 t ha-1) was obtained from the first sowing (30 November) with BINA Sharisha-5 and it was significantly different from the yields of all other combination.J. Bangladesh Agril. Univ. 14(2): 155-160, December 2016
Highlights
Oilseed rape (Brassica napusL.) has become one of the most important oil crops (Miri, 2007) and at present, is the third largest source of vegetable oil all over the world (Starner et al, 1999)
Results showed that the highest grain yield (1.73 t ha-1) was obtained from the first sowing (30 November) with BINA Sharisha-5 and it was significantly different from the yields of all other combination
Inappropriate weather conditions in tidal floodplain region during the flowering period, fertilization and pod formation can cause a decrease in duration of maturity period, affect the number of pods per plant, affect the number and weight of grains and can lead to decrease in grain yield (Rahnama and Bakhshandeh, 2005)
Summary
Oilseed rape (Brassica napusL.) has become one of the most important oil crops (Miri, 2007) and at present, is the third largest source of vegetable oil all over the world (Starner et al, 1999). Rapeseed (Brassica campestris L.) commonly known as mustard oil seed crop in Bangladesh, is a cool season crop. It is a thermo sensitive as well as photosensitive crop (Ghosh and Chatterjee, 1988). Mustard oil cake is utilized as cattle feed and small quantities are used as manure It accounts about 72% of total oilseed production in the country. The present domestic edible oilseed production is 267 thousand tons which meets only one third of national demand (Anonymous, 2006). 2010, the total rapeseed harvested area 598000 ha and yield 371 kg acre-1 and the production quantity 222000 tons in Bangladesh (BBS, 2011).
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