Abstract:
The experiment was conducted during the period from November 2014 to March 2015 in the
experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka to
find out the effect ofamount of irrigated waterunder varying sowing times on growth and
yield of wheat.The experiment comprised of two factors; Factors A: Irrigation (3 levels): I
:
Irrigation upto field capacity; I
2
: Irrigation upto 1/2 of field capacity and I
: Irrigation
upto1/4
th
of field capacity(at crown root initiation, flowering and grain filling stage); Factor
B: Sowing time (4 levels at 10 days interval): S
1
: Sowing at 10 November, 2014; S
: Sowing
at 20 November, 2014; S
3
: Sowing at 30 November, 2014and S
: 10 December,2014. The
experiment was laid out in Split Plot Design with three replications. Irrigation was assigned
in the main plot and sowing date was assigned in the sub-plot.Irrigationupto fieldcapacity
(I
1
) recorded the highest plant height, tillers hill
-1
4
and all yield contributing and yield
parameters and the lowest in irrigation upto 1/4
th
of field capacity (I
).November 20 sowing
(S
2
) produced the highest results than that of November10 sowing (S
3
).Due to cumulative
action of irrigation upto field capacity(I
1
) and November 20 sowing (S
1
) the combination
effect (I
1
1
S
2
2
) recorded the highest values in spike length(36.72cm),number of spikelets spike
(17.60), number of grains spike
-1
(54.13) , 1000 grain weight (55.15 g),grain yield (3.97 t
ha
-1
), straw yield (4.31 t ha
-1
) , biological yield (8.280 t ha
-1
) and harvest index(47.93%)
respectively. Due to poor performance of individual treatment of irrigation upto 1/4
of
capacity (I
3
) and November 10 sowing time (S
1
) the combination I
3
S
recorded statistically
the lowest grain yield (2.75 t ha
-1
), straw yield (3.17 t ha
-1
1
3
2
) , biological yield (5.92 t ha -
)
and harvest index (46.42%).
th
1
1
-
Description:
A Thesis
Submitted to the Dept. of Agronomy, Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements for the degree of
MASTER OF SCIENCE
IN
AGRONOMY
SEMESTER: JANUARY-JUNE, 2015
