Abstract:
An experiment was conducted at the Agrictilture Research Station, Bangladesh
Agricultural Research Institute, l3urirhat, Rangpur during rahi -,Cason of 2004-05 to find
out optimum planting time for the newly selected genotype I3CYS-03. There were five
planting dates viz. October 20, October 30, November 10, November20 and November
30. Significant variations due to dillerent planting dates were observed in days to
maturity, plant height, number of primary branches plant', seed yield plant
4, siliqua
plant'. seeds siliqua'. 1000-seed weight, seed yield hi', biological yield ha
4and dry
weight plant'. Results showed that the highest seed yield (1.86 t ha') was obtained
from the second planting (October 30) and it was significantly different from the yields
of all other dates of planting. Yield contributing characters were also found higher in
the plants of second planting. The seed yield (1.47 t ha') of last planting was also
satisfactory because of the prolong winter season prevails in the northern part of the
country. Variations in respect of oil content in seed and fatty acid composition of oil
were also obtained from different planting dates. Seeds obtained from the early
plantings contained higher oil percentage in seed and lower concentration ofenicic acid
in oil. Variations of oleic, linoleie and linolenic acids in oil also observed due to
dillèmnt planting dates.
