Abstract:
An experiment was conducted at the agronomy research field of Sher-e-Bangla
Agricultural University. Dhaka during the period from October 2013 to February
2014 to evalute the influence of irrigation and nitrogen on yield of rapeseed
(Brassica campestries). There were four different levels of irrigation viz., no
irrigation, one irrigation at 25 days after sowing (DAS), two irrigations at 25 and
50 days after sowing (DAS) and three irrigations at 25, 50 and 70 days after
sowing (DAS) and four levels of nitrogen viz.,
0. 58, 115 kg N hi' and urea super
granule (1.8 gm USO placed at 50 cm distance at 5 cm depth in the row) N hi'.
The experiment was laid out in split plot design with 3 replication. Irrigation and
nitrogen significantly influenced the growth, development, yield and yield
attrihuters of rapeseed. Plant height, plant dry matter, branches plant'.
siliqua
length, seeds siliqua-', weight of 1000-seeds, seed yield, stover yield, biological
yield and harvest index were significantly influenced by both irrigation and
nitrogen. Among the irrigation treatments three irrigation-one at 25 DAS (preflowering
stage), second at 50 DAS (siliquae formation stage) and another at 70
(seed
maturation stage) resulted the better growth parameters like plant height,
dry matter weight and the yield components like branches plani', siliquae planf'.
siliqua length, seeds siliqua', 1000 seed weight, seed yield, stover yield, and
harvest index. The highest seed yield (1589 kg hi') was obtained at three
irrigations while control treatment gave the lowest yield (1095 kg hi') .me results
revealed that, at the rate of 115 kg N hi'
performed the best results in all respect.
The highest seed yield (1712 kg ha') was obtained at 115 kg N hi' . The
interaction effect of irrigation and nitrogen revealed that three irrigations one at 25
DAS (pre-flowering stage), second at 50 DAS (siliquae formation stage) and
another at 70 DAS (seed maturation stage stage) in combination with 115 kg N ha
gave highest yield (2065 kg ha') by producing highest yield contributing
characters as well as other yield contributing characters
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
