Abstract:
An experiment was conducted to study the effect of salinity on germination,
morphology and mineral contents of seedlings of 28 different rice (Oryza saliva
L.) cultivars under 5 levels of salinity (0, 3, 6, 9 and 12 dS mi using completely
randomized design with three replications. The germination percentage, seedling
height, root dry weight. shoot dry weight and total dry matter of seedlings were
significantly influenced by salinity. The higher germination percentage, seedling
height. root dry weight. shoot dry weight and total dry matter were found in
cultivars Nona Bokkra. Hecra-2. Sadarnota, Lalmota, BINA SaI-2 and BRRI
dhan47 while the lower values were recorded in BRRI dhan28 followed by BRRI
dhan29 and BR 22. The percent germination, root dry weight. shoot dry weight
and total dry matter decreased with increasing salinity levels. Though Lower levels
of salinity (0 to 3 dS in-') did not significantly affect on percent germination. The
concentration of Na. Ca2' and Mg2' except C and values of Na/K. Na/Ca and
Na/Mg ratio significantly increased in seedlings irrespective of cultivars with
increasing levels of salinity. Value of Na/K increased slowly in cultivars Bashiraj.
BINA Sal-2. Nona l3okkra. Komragor. Lalmota and BRRI dhan47 which is an
indication of salt tolerance.
Description:
A Thesis
Submiued to the Faculty of Agriculture,
Sher-e-Bangra Agriculiural University, Dhaka-1207
in part fulfillment of requirements for the degree of
MASTER OF SCIENCE (M.S.)
IN
AGRICULTURAL CHEMISTRY
SEMESTER: July- December'10
