Abstract:
Soil salinity becoming a limiting problem globally for agriculture. Salinization is one of
the major natural hazards hampering crop production in costal part of Bangladesh. This
study aimed to determine the salinity on physical and chemical properties of soil in
coastal areas (Bagerhat and Pirojpur district) of Bangladesh and also to observe the salt
tolerance of morphological, physiological and yield traits of brinjal genotypes. The
stability analysis of binjal genotypes was observe at different location of farmer’s field in
the coastal area. The study areas Electrical conductivity (EC) ranged from 7.35 to 1.13
dS/m and Cation Exchange Capacity (CEC) values ranged from 5.99 to 49.37 with the
highest salinity was in the month of May. Low concentrations of total nitrogen,
phosphorus, exchangeable calcium and magnesium and high level of exchangeable
potassium was found in the study area. In case of four different treatments germination
percentage was maximum rather than control ranged from 63.74 to 90.24 at T
(4 dS/m
NaCl), with an average of 80.63% in BARI Hybrid Begun 2. Effect of salinity was also
observed on plant height (cm), root, leaves, stem fresh weight and dry weight (g/plant),
number of leaves/plant, length and width of leaves (cm), days of first flowering, number
of cluster/plant, number of branches/ plant, number of fruits/plant, fruit diameter (cm),
individual fruit weight (g), weight of fruit/plant (Kg), Leaf Area Index (LAI) and
chlorophyll content. Leaf length significantly reduced irrespective of genotypes. Leaf
breadth at vegetative stage of eight brinjal genotypes recorded 18.95 cm at control
environment, while 15.56 cm at T
1
(4 dS/m), 12.77 cm at T
(8 dS/m) and 8.84 cm was
recorded at T
3
iii
2
(12 dS/m), i.e.53.33% reduced leaf breadth from control environment. In
the reproductive stage maximum leaf area index (LAI) was recorded in F
14x5(603.67
cm
2
), F
1
12x11 (518.40 cm
2
) at control condition and decreasing trend was found with the
increase of salinity level. In case of yield the level of salinity decrease all the yield
parameters and it was12.34% reduced at 4 dS/m and 40.37% at 12 dS/m. Among the
genotypes maximum yield was recorded at F
14×5 and BARI Hybrid Begun 2. Based on
Genotype X Environment (GXE) highest interaction was observed in the genotypes
responded in BARI Hybrid Begun 2, F
1
1
14×5 and BARI Begun 5 interaction with the
environment Gazipur Sadar and Bagerhat Sadar and had better yield potentiality than
other genotypes based on the positive genotypic and environmental mean values,
phenotypic index and environmental index values. Therefore, F
14x5, BARI Hybrid
Begun 2 performed better in salinity level 2 dS/m to 8 dS/m than compare to other
genotypes in the study area.
Description:
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
AGROFORESTRY AND ENVIRONMENTAL SCIENCE
