An assessment of Iranian wheat (Triticum aestivum L.) genotypes under saline and waterlogged compacted soil conditions II: Leaf ion concentrations

ABSTRACT: A pot experiment was conducted to study effects of salinity and waterlogging under soil compaction conditions on grain yield and yield components of wheat. Treatments were arranged in a factorial layout assigned to a randomized complete design with three replications. Treatment combinations included: two sets of compaction levels, i.e. non-compacted and compacted soil; four abiotic stresses, i.e. non-saline aerobic (untreated silt loam texture soil having ECe = 3 dS m-1); saline × aerobic (S) (ECe 15 dS m-1); saline × waterlogged (S×W); and waterlogged alone (W) were applied; and two Iranian wheat genotypes i.e. Kouhdasht and Tajan. Compaction was achieved by dropping a 5 kg weight, 20 times from 70 cm height on a wooden block placed on top of soil-filled pots. In non-waterlogged treatments, soil water was maintained at 70% of available water holding capacity (AWHC). Waterlogging was achieved by maintaining water up to 110% of the soil’s AWHC for 25 days during tillering stage. S×W caused significantly higher reduction in K+ concentrationfor both genotypes than other treatments. S×W also resulted in higher leaf Na+ and Cl- concentrations in comparison to other treatments. Kouhdasht maintained significantly higher K + concentration and K+: Na+ ratio at S and S×W treatments than that Tajan (under both non-compacted and compacted soil conditions).