EFFECT OF NITROGEN LEVELS ON GROWTH, YIELD AND SEED QUALITY OF WHEAT
Date
2015-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
DEPARTMENT OF AGRONOMY
Abstract
A field experiment was conducted at the Research Field and Agronomy Laboratory of Shere-Bangla
Agricultural University, Dhaka 1207 during the period from November, 2014 to
March, 2015 to evaluate the effect of nitrogen levels on growth, yield and seed quality of
wheat. The experiment comprised of five nitrogen levels viz. (i) N
= Control (no nitrogen),
(ii) N
1
= 25% less nitrogen from the recommended dose, (iii) N
2
0
= Recommended dose of
nitrogen, (iv) N
3
= 25% higher nitrogen than recommended dose, (v) N
= 50% higher nitrogen
than recommended dose and four wheat varieties viz. (i) V
1
4
= BARI gom 21, (ii) V
= BARI
gom 23 (iii) V
3
= BARI gom 24 and (iv) V
= BARI gom 27. The experiment was laid out
in a split plot design with three replications. Data were collected on different parameters of
growth, yield attributes, yield and seed quality of wheat. Results revealed that N
4
(25%
higher nitrogen than recommended dose) gave the highest grain yield (3.41 t ha-1) which was
statistically at par with N
(recommended dose of nitrogen) (3.29 t ha-1). This might be
attributed to highest number of spikes m
2
-2
(194.46), spike length (15.61 cm), number of
spikelets spike
-1
(20.91), number of grains spike
-1
(48.17) and 1000-grain weight (47.08 g).
Out of 4 varieties V
3
(BARI gom 24) showed highest grain yield (3.02 t ha
) which was
statistically similar with V
4
(BARI gom 27) (2.89 t ha
-1
-1
). The variety BARI gom 27 (V
) also
showed higher number of grains spike
-1
(46.65) and 1000-grain weight (49.53 g). In respect
of seed quality, N
(recommended dose) showed higher quality of seed which was
statistically similar to N
2
(25% higher nitrogen dose than recommended) because this
nitrogen dose gave highest germination percentage (96.67 %), vigor index (10.34), shoot
length (19.94cm) and dry weight seedling
3
-1
(0.19 g). In the case of variety, V
(BARI gom
27) showed the higher seed quality attributes of germination percentage (95.20%), vigor
index (10.52) shoot length (20.51cm) and dry weight seedling
-1
(0.18 g). Regarding the
interaction of nitrogen doses and varieties, N
2
V
3
, N
2
V
4
and N
3
V
were shown best in
producing quality seeds. From the above results it was concluded that the recommended dose
and 25% higher nitrogen than recommended dose with BARI gom 27 shows better for
producing higher yield and quality seed.
4
4
2
3
4
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
IN
AGRONOMY
SEMESTER: JANUARY-JUNE, 2015
Keywords
NITROGEN LEVELS, WHEAT