تلخیص
Response of salt talerant eucalyptus species (Eucalyptus camaldulensis, Local) to dual stress of salinity and waterlog ging was studied in a lysimeter. The three salinity levels via S (Control: 3.5 dS m!’), Sz (15 dS m!’) and So (30 dS m!’) were developed in the lysimeters. Six month-old uniform saplings of E. camaldulensis were transplanted in each Lysimeter. Six weeks afier transplanting, waterlogging (anaerobic stress) was imposed in half of the lysimeters and maintained continuously for 12 weeks. Plants were harvested afier 22 weeks of transplanting. Salinity significantly (p<0.01) depressed all of the growth parameters including tree height, number of branches and plant biomass compared to non-saline treatment. Waterlog ging alone did not affected growth parameters significantly. Hazardous effects of salinity were many folds aggravated when plants were subjected to waterlog ging. Different aged leaves exhibited significant variations for sodium (Na+) and chloride (Cl!) concentrations. Na’ and Cl! concentration in leaves were significantly increased when plants were subjected to dual stress of salinity and waterlogging compared ta salinity and waterlogging alone. Salinity stress significantly decreased potassium (K) concentration and W:Na* ratio in leaves of eucalyptus. Concentration of both Na+ and Cl! cancentration was significantly more in old leaves compared to medium and young leaves indicating an adoption ofE. camaldulensis against salinity stress.
M. Nasim, M. Saqib , , T. Anil, , S. Nawab, , J. AkhtaJ, , M. Anwar-ul-Has , S.T. Sahi¹. (2008) Changes in growth and ionic composition of Eucalyptus camaldulensis under salinity and waterlogging stress; a lysimeter study, The Journal Soil & Environment , Volume 27, Issue 1.
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