STUDY ON GRAIN YIELD AND YIELD COMPONENTS OF WHEAT WHEN SOWN LATE
Date
2022
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
DEPARTMENT OF AGRONOMY
Abstract
A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka
during the period from November 2021 to March 2022 in Rabi season, to study on
grain yield and yield components of wheat when sown late. The experiment consisted
of two factors, and followed Randomized block design with three replications. Factor
A. Wheat varieties (2) viz; V
1
: BARI Gom-32 and V
: BARI Gom-33 and Factor B.
Different sowing date (5) viz; S
1
: 1
st
ii
2
sowing date : 28
th
November, 2021, S
sowing date : 5
th
December, 2021, S
3
: 3
rd
sowing date : 15
th
December, 2021, S
sowing date : 21
th
December, 2021 and S
5
: 5
th
sowing date : 28
th
December, 2021.
Experimental result showed that in case of different wheat varieties the lowest grain
yield (3.96 t ha
-1
) was observed in V
(BARI Gom-32) treatment. Whereas cultivating
BARI Gom-33 (V
2
1
) variety gave the highest spike length (10.63 cm), spikelets spike
(17.59), grains spike
-1
(46.85), 1000 grains weight (43.51 g), grain yield (4.73 t ha
),
straw yield (5.86 t ha
-1
), biological yield (10.59 t ha
-1
) and harvest index (44.66 %).
Among different sowing dates, seeds sown on 28
th
November (S
treatment) recorded
the highest spike length (10.46 cm), spikelets spike
-1
1
(17.49), grains spike
(52.89),
1000 grains weight (46.20 g), grain yield (4.66 t ha
-1
-1
), straw yield (5.69 t ha
),
biological yield (10.35 t ha
-1
) and harvest index (45.01%). In case of combination
treatment the V
2
S
combination treatment gave the highest highest spike length (11.46
cm), spikelets spike
1
-1
(18.46), grains spike
-1
(56.46), 1000 grains weight (47.35 g),
grain yield (5.02 t ha
-1
), grain yield (6.07 t ha
-1
), biological yield (11.09 t ha
) harvest
index (45.27 %) comparable to other combination treatments. Therefore considering
above all facts, it may be concluded that BARI Gom-33 variety seed sown on 28
November (V
2
S
) seems promising for reduction of yield less of late sown wheat than
compared to other combination treatment and planting wheat seeds later than 28
1
November should be discouraged as it reduces wheat yield in both varieties.
Description
A Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the
requirements for the degree of
MASTER OF SCIENCE
IN
AGRONOMY
Keywords
GRAIN YIELD, WHEAT WHEN SOWN LATE