growth response and ion distribution of two canola varieties to different potassium to sodium ratios

rapeseed (brassica napus l.) is a crop relatively tolerant to salt. the effect of different ratios of nacl/kcl was studied in two cultivars (hyola308 and kristina) of rapeseed in 2002. canola seedlings were grown in hoagland’s solutions, which were salinized by different ratios of nacl/kcl. the treatments or kcl:nacl ratios were 0:0 (control);10:10; 20:0 (total added salt or tas=20 mol.m-3), 0:75; 10:65; 20:55(tas=75 mol.m-3); 0:150; 10:140; 20:130; (tas=150 mol.m-3) in a randomized complete block design with three replications. plants were harvested before flowering stage and data were collected for root and shoot characteristics. the results indicated that in both cultivars, the shoot dry weight was decreased with increasing nacl concentration in nutrient solutions. increasing the kcl concentration in the nutrient medium significantly (p