Abstract:
The study was carried out at the Field Laboratory of Sher-e- Bangla Agricultural
University farm, Dhaka during October 2004 to February 2005 to evaluate the effect of
sowing date and variety on yield and yield components of rapeseed
(Brass/ca campesiris
and
Brassica napus).
The treatments comprised of four sowing dates at 15-days interval on viz.
October 20, November 4, November 19 and December 4 and three varieties viz. Improved
Tori-7, BARI Sarisha-8 and BARI Sarisha-9. The experiment was laid out in a Randomized
Complete Block Design.
The results showed that BARI Sarisha-8 performed best by producing 52.4 % and
132.9
% higher yield than BARI Sarisha-9 and Improved Tori-7, respectively. This variety
(BARI Sarisha-8) also showed higher siliquae planf', seeds siIiqua, siliqua length. 1000
seed weight, shelling percentage, stover yield, biological yield and harvest index. In case of
sowing date, grain yield reduced gradually with the advancement of delay in sowing. October
20 sowing gave maximum grain yield (1422 kg ha) and that of lowest
(437.2
kg ha
S
') was
observed in December 4. BARI Sarisha-8 on October 20 sowing produced the significantly
highest grain yield (1865 kg hi') and the lowest (130 kg ha") was found in Improved Tori-7
on December 4 sowing. The variety BARI Sarisha-8 and October 20 sowing performed best
in respect of grain yield as well as other studied parameters.
