Year 2019http://localhost:8080/handle/123456789/46052026-04-18T16:31:22Z2026-04-18T16:31:22ZMITIGATION OF SALT-INDUCED DAMAGES IN WHEAT BY EXOGENOUS APPLICATION WITH ASCORBIC ACID, SILICON AND GIBBERELLINISLAM, SHAHIDULhttp://localhost:8080/handle/123456789/46102022-11-15T10:00:28Z2019-01-01T00:00:00ZMITIGATION OF SALT-INDUCED DAMAGES IN WHEAT BY EXOGENOUS APPLICATION WITH ASCORBIC ACID, SILICON AND GIBBERELLIN
ISLAM, SHAHIDUL
Considering the salinity issue three studies were conducted to find out the effect of
salt stress on morph-physiological and biochemical changes of wheat (BARI Gom26)
as well as mitigation of the adverse effect through exogenous application of
Ascorbic Acid (AsA), Silicon (Si) and Gibberellic Acid (GA3). The performances of
secondary seeds were also evaluated. The studies were conducted at the net house
and plant physiology laboratory of Agronomy department, Sher-e-Bangla
Agricultural University, Dhaka, Bangladesh. In field experiment, four levels of salt
stress (0, 50, 80, 120 mM NaCl) were applied on growing media of wheat seedling at
20 days after sowing and grown up to harvest where in laboratory experiment salinity
were applied 3 days after sowing grown upto 10 days. In both experiments AsA (2
mM ascorbic acid), Si (200 µM SiO
2
), GA3 (100 µM gibberallic acid) were applied
as foliar spraying (several times with interval) in another set of respective salt stress
treatments. In field study salt stress decreased plant growth, biomass, water status
and yield attributes by altering ionic balance, hampering osmotic status and reducing
chlorophyll (chl) content. In the laboratory experiment, salt stress increased reactive
oxygen species (ROS) generation and lipid peroxidation which contributes to
alteration of osmotic status and chl content as well as growth and biomass of the
plant. However, foliar application of AsA, Si and GA3 on salt affected plant
decreased ROS generation, lipid peroxidation and proline production; increased
water status and chlorophyll pigments which contribute in improved growth and
yield of wheat seedling in contrast to respective stress. Moreover, the findings of the
third experiment confirmed that AsA, Si and GA3 enhanced the performance of
secondary seeds originated from the first experiment. Considering the results of all
experiments GA3 performed better than the AsA and Si in mitigating salt stress.
A Dissertation
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
DOCTOR OF PHILOSOPHY
IN
AGROMONY
2019-01-01T00:00:00ZADAPTABILITY OF WHITE MAIZE AND MITIGATION OF WATER STRESS BY ANTITRANSPIRANTFATIMA, KANIZhttp://localhost:8080/handle/123456789/46092022-11-15T09:58:21Z2019-01-01T00:00:00ZADAPTABILITY OF WHITE MAIZE AND MITIGATION OF WATER STRESS BY ANTITRANSPIRANT
FATIMA, KANIZ
Six trials with eight varieties of white maize viz. PSC-121, KS-510, Changnuo-1, Q-
Xiangnuo-1, Changnuo-6, Yangnuo-3000, Yangnuo-7 and Yangnuo-30 were carried out
at three different sites viz. SAU (Sher-e-Bangla Agricultural University); Dhamrai and
Rangpur Sadar of Bangladesh during Rabi seasons of 2015-16 and 2016-17 to investigate
adaptability and water stress mitigation. In the first year at SAU, significantly higher grain
yields were found in five varieties, PSC-121 (8.26 t ha
iv
-1
), Q-Xiangnuo-1 (7.17 t ha
),
Changnuo-1 (8.62 t ha
-1
), Changnuo-6 (8.52 t ha
-1
) and Yangnuo-30 (8.35 t ha
) but at
Dhamrai, the higher yields were produced by PSC-121 (8.59 t ha
-1
-1
), KS-510 (8.81 t ha
),
Changnuo-1 (8.24 t ha
-1
) and Changnuo-6 (9.13 t ha
-1
) and at Rangpur by Changnuo-1
(6.65 t ha
-1
) and Q-Xingnuo-1 (6.14 t ha
-1
). In the second year, PSC-121 at SAU,
Changnuo-1 both at Dhamrai and Rangpur gave significantly the highest grain yields of
10.31, 8.45 and 12.15 t ha
-1
respectively. Changnuo-1 at all the sites, while PSC-121 at
SAU was the second best performer. The least seed yields were obtained from Yangnuo7
(3.76
-
6.74
t
ha
-1
). Drought imposing trial on six varieties namely PSC-121, Changnuo1,
Changnuo-6, Yungnuo-3000, Yungnuo-7 and Yungnuo-30 was conducted under
varying irrigation regimes, viz. no watering from 80 days after sowing (DAS) to
harvesting, no watering from 100 DAS to harvesting and control (with irrigation at every
day) where grain yield reduced drastically to almost half (3.44 t ha
-1
) when watering was
stopped from 80 DAS compared to the control (6.57 t ha
-1
). Changnuo-1 was found to be
the most drought tolerant variety, which yielded 5.96 t ha
-1
. In the antitranspirant trial, two
varieties namely V
1
- PSC-121 and V
2
= Changnuo-1 were tested under four concentrations
of Kaolin (C
O
= 0%, C
1
= 2%, C
2
= 4%, C
3
= 6%). The 6% concentration yielded
significantly the highest (8.75 t ha
-1
), which was 16% higher than that of the control (7.38
t ha
-1
). In the interaction treatment, PSC-121 with all the concentrations yielded
significantly higher seed yields. PSC-121 with 6% concentration of Kaolin yielded the
highest of 9.12 t ha
-1
, while 8.21 t ha
-1
with the control. The results showed 16% yield
increase having 6% Kaolin spray and 8% increase in 2% Kaolin spray. The grain
nutritional analyses showed the maximum content of protein in Q-Xiangnuo-1 (9%) fiber
in Yangnuo-7 (2.96%) and carbohydrate (75.13%) and AAC (apparent amylose content)
(24.41%) Changnuo-1. PSC-121, Changnuo-1, Q-Xiangnuo-1, Yangnuo-3000 and
Yangnuo-7 had higher fat contents (~ 4%). The highest Glycemic Index (GI) was obtained
in Yangnuo-7 (71.24 %). The Changnuo-1 might be recommended for cultivation for its
best performance in all the studied sites and tolerant to the drought stress condition as well
as for containing the highest fat, carbohydrate and AAC contents. For higher yield and
water conservation in plant, 2% Kaolin might be recommended for spraying at tasseling
stage.
Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
DOCTOR OF PHILOSOPHY
IN
AGRONOMY
2019-01-01T00:00:00ZSUITABILITY OF PLANT SPACINGS AGAINST MEPIQUAT CHLORIDE TREATED COTTON PLANT FOR IMPROVEMENT OF YIELD AND QUALITYAHMED, MD. SHAHEENhttp://localhost:8080/handle/123456789/46082022-11-15T09:56:18Z2019-01-01T00:00:00ZSUITABILITY OF PLANT SPACINGS AGAINST MEPIQUAT CHLORIDE TREATED COTTON PLANT FOR IMPROVEMENT OF YIELD AND QUALITY
AHMED, MD. SHAHEEN
Plant growth regulators (PGRs) are used in cotton production to optimize yield and quality and even
suppressing excess growth whenever necessary. Experiments were conducted in three consecutive years
(2016-17, 2017-18 and 2018-19) at Cotton Seed Multiplication, Training and Research Farm, Sreepur,
Bangladesh to study the response of cotton yield and quality to different plant spacings, concentration and
time of application of mepiquat chloride (MC) growth regulator. Plant spacings like 45 cm × 30 cm, 60 cm ×
20 cm, 60 cm × 30 cm, 60 cm × 40 cm, 75 cm × 30 cm, 75 cm × 40 cm, 90 cm × 10 cm and 90 cm × 45 cm;
MC spray @ 1.0 ml L
-1
water at 25, 50, 75, 100 and 125 DAE; MC spray @ 1.0, 2.0, 3.0 and 4.0 ml L
water
at 25, 50 and 75 DAE for each concentration; MC spray @ 2.0 and 4.0 ml L
-1
water
at 25 DAE, 2.0 and 4.0 ml
L
-1
water
at 50 DAE, 2.0 ml L
-1
water
at 25 & 50 DAE along with water spray as control, were the treatment
variables. Plant spacing of 60 cm × 30 cm showed the highest values of different parameters of cotton across
the years (2016, 2017 and 2018) as maximum seed cotton yield (4.20, 3.48 and 4.04 t ha
-1
) and lint yield (9.08,
7.59 and 7.57 bales ha
-1
); higher LAI (0.75 and 0.80) and boll weight (4.94 and 4.9 g) during 2016 and 2017,
internode (4.46 and 4.16 cm) and leaf canopy size (0.29 and 0.33 m
2
) during 2016 and 2017; maximum
squares plant
-1
(10.21 and 12.67) and bolls plant
-1
(11.56 and 11.37) during 2017 and 2018 were evident. In
case of MC application, maximum seed cotton (2.62 t ha
-1
) and lint yield (6.79 bales ha
-1
) were noted from 1.0
ml MC L
-1
water
sprayed at 25 DAE during 2016. In 2017 and 2018, treatment 2 ml MC L
water at 25 DAE
gave higher squares plant
-1
(10.94 and 13.83), bolls plant
-1
(14.56 and 10.97), boll weight (4.98 and 5.00 g),
seed cotton yield (3.96 and 4.03 t ha
-1
) and lint yield (8.78 and 7.71 bales ha
-1
), respectively. Plant spacing of
60 cm × 30 cm along with application of 2 ml MC L
-1
water at 25 DAE gave significantly higher values of
squares plant
-1
(15.24 and 16.6), bolls plant
-1
(17.33 and 16.6), seed cotton yield (4.53 and 4.67 t ha
) and lint
yield (9.43 and 10.06 bales ha
-1
) as compared to control treatments (without MC and conventional wider
spacing of 90 cm × 45 cm) in 2017 and 2018. So, cotton cultivation in Sreepur, Gazipur areas may be
accelerated with foliar application of mepiquat chloride @ 2 ml L
-1
water at 25 DAE along with plant spacing
of 60 cm x 30 cm for higher yield and quality.
A THESIS
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
DOCTOR OF PHILOSOPHY
IN
AGRONOMY
2019-01-01T00:00:00ZSCREENING OF PROCESSING QUALITY POTATO VARIETIES FOR INDUSTRIAL PURPOSE AND ENHANCING THEIR QUALITY THROUGH VERMICOMPOST APPLICATIONHAQUE, MD. AYNULhttp://localhost:8080/handle/123456789/46072022-11-15T09:54:13Z2019-01-01T00:00:00ZSCREENING OF PROCESSING QUALITY POTATO VARIETIES FOR INDUSTRIAL PURPOSE AND ENHANCING THEIR QUALITY THROUGH VERMICOMPOST APPLICATION
HAQUE, MD. AYNUL
Good quality potato is the main bottleneck for the expansion and improvement of potato
processing industry in Bangladesh. Application of suitable organic manure viz.,
vermicompost also with required fertilizers might be improved its processing quality.
From the perspective, four years consecutive experiments were carried out in the research
field of Sher-e-Bangla Agricultural University (SAU), Dhaka-1207 from November, 2015
to April, 2018. Thirty six (36) potato varieties were used as treatment under experiment 1
namely: BARI Alu-25 (Asterix), Cardinal, Rojato, BARI Alu-70 (Destiny), Festa Pakri,
Tel Pakri, Bot Pakri, Stick, Dora, Granolla, BARI Alu-68 (Atlantic), Raja, Binella,
Dheera, Sagita, Patrones, BARI Alu-29 (Courage), Provento, Felsina, Multa, BARI Alu28
(Lady
Rosetta),
Meridian,
Forza,
Saikat,
Laura,
Ailsa,
Cumbica,
Omera,
Rumba,
Jerla,
Elgar,
BARI Alu-71 (Doly), Agila, Quincy, Almerah and Steffi. The experiment 2
comprised of two factors viz., factor A: 4 Variety; V
ii
1
= BARI Alu-68 (Atlantic), V
=
BARI Alu-29 (Courage), V
3
= BARI Alu-25 (Asterix) and V
= BARI Alu-28 (Lady
Rosetta) and factor B: 5 Vermicompost levels; Vm
1
= 0 t ha
-1
, Vm
4
1
, Vm
4
= 9 t ha
-1
and Vm
5
= 12 t ha
-1
2
= 3 t ha
. The experiment 3 comprised of three factors namely,
factor A: 6 Variety; V
1
= BARI Alu-68 (Atlantic), V
2
-1
, Vm
3
= BARI Alu-29 (Courage), V
=
BARI Alu-28 (Lady Rosetta), V
4
= Alu-25 (Asterix), V
= BARI Alu-70 (Destiny) and
V
6
= BARI Alu-71 (Doly); factor B: 2 Vermicompost levels; Vm
5
1
= 9 t ha
= 12 t
ha
-1
and factor C: 2 Harvesting period; H
1
-1
and Vm
= 90 days after planting (DAP) and H
= 100
DAP. The experiment 4 comprised of three factors namely, factor A: 4 Variety; V
=
BARI Alu-70 (Destiny), V
2
= BARI Alu-71 (Doly), V
= BARI Alu-28 (Lady Rosetta) and
V
4
3
= BARI Alu-25 (Asterix); factor B: 2 Vermicompost levels; Vm
1
= 9 t ha
=
12 t ha
-1
and factor C: Harvesting period (2): H
1
-1
2
= 6 t ha
2
2
and Vm
= 90 days after planting (DAP) and H
=
100 DAP. The design used in the experiment 1, 2, 3 and 4 were RCBD, Split-plot, Splitsplit-plot
and Split-split-plot design, respectively with three replications. The results
revealed that, the variety and/or vermicompost and/or harvesting time have significantly
influenced most of the parameters studied under all experiments. Among the thirty six
potato varieties, Lady Rosetta, Asterix, Courage, Destiny, Doly and BARI Alu-68
exhibited the best results for tuber yield, specific gravity and dry matter content in
experiment 1. In experiment 2, Lady rosetta and Asterix performed better for yield and
processing qualities of potato. Vermicompost application at the rate of 9 t ha
1
also exhibited the best two doses for yield and processing qualities of potato over
control. In experiment 3, Lady rosetta, Asterix, Destiny and Doly showed better for yield
and processing qualities of potato compared to those other varieties. Vermicompost
application at the rate of 9 t ha
-1
showed the best one and potato harvested at 90 DAP
exhibited the best performance for most of the parameters studied. In experiment 4, the
Lady rosetta and Asterix showed better for yield, processing and sensory traits of potato
in combination with vermicompost at the rate of 9 t ha
-1
and tubers harvested at 90 DAP.
Asterix in combination with vermicompost at the rate of 9 t ha
-1
and tubers harvested at
90 DAP gave the highest monetary advantages (945,960 Tk). On the other hand, in case
of lower reducing sugar and minimum sweetness, vermicompost at the rate of 12 t ha
and tubers harvested at 90 DAP produced good quality potato. Finally, it may be
concluded that the potato growers may use the variety, Lady rosetta and Asterix for better
yield and good processing qualities under the prevailing climatic condition of AEZ-28
(Madhupur Tract) with the combination of vermicompost at the rate of 9 t ha
and the
tuber should be harvested at 90 DAP for producing good quality potato.
A Dissertation
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
DOCTOR OF PHILOSOPHY (PhD)
IN
AGRONOMY
2019-01-01T00:00:00Z