تاثیر تنش شوری بر برخی خصوصیات کمی و کیفی ارقام کلزای بهاره

To evaluate the effect of salinity on some quantitative and qualitative characteristics of spring rapeseed cultivars, an experiment was conducted in the greenhouse conditions at YasoujUniversityas a factorial with three replications. Four salinity levels (1.92 (as control), 9.87, 19.6 and 21.94 dSm^-1 (NaCl and CaCl2 with ratio 20 to 1 in Hoagland solution)) as a first factor and eight cultivars as second factors were used. Some important quantitative and qualitative charecters of cultivars were recorded during growing season. Results showed that effect of salinity, cultivar and interaction between salinity and cultivar on studied characteristics were significant. Results showed that with increasing salinity levels, all measured traits, significantly decreased, except for number of non-fertile pod per plant. Generaly, Hyola60 and Hyola330 cultivars that showed higher amount of grain yield and oil yield than other cultivars were introduced as the most tolerant cultivars. Also these two cultivars had less non fertile pod at high salinity levels. PP-401-15E cultivar had a weak response to high salinity levels (19.6 and 21.94 dSm^-1), and, it was introduced as the most sensitive cultivar to salinity.