Two separate experiments in solution culture were conducted simultaneously under saline conditions with varying
external K:Na ratios. Shoot and root yield, their composition
and selectivity of Kover Na under all set of conditions were
calculated for NIAB-6 (salt tolerant) and IR 1561 (salt sensitive). Salinity decreased shoot and root yield drastically but
different ratios of K:Na and Ca:Na did not affect these yields
in both cultivars. Concentration of K and Ca in tissues increased with their increasing levels in the external solutions.
Salinity though reduced K:Na level in shoot and root yet salt
tolerant line (NIAB-6) maintained better selectivity (S K+' Na+;
under saline conditions. The role of Ca in the improvement of
K selectivity (8K+. Na +) under saline environment has been discussed.
Muhammad ASlam. (1990) EFFECT OF DIFFERENT EXTERNAL K+/Na+ AND Ca2 +/Na+ RATIOS ON GROWTH, IONIC COMPOSITION AND SELECTIVITY OF RICE LINES VARYING IN SALT TOLERANCE, , Volume 27, Issue 4.
