SALINITY EFFECTS ON YIELD, YIELD COMPONENTS ANDNUTRIENT IONS IN RAPESEED GENOTYPES

Soil salinity is a major restriction to crop production in many areasof the world. Seven spring types of rapeseed genotypes were evaluated in foursalinity levels of irrigation water including 0, 4, 8 and 12 dsm^-1. A factorialexperiment based on completely randomized design with 3 replications wasconsidered for evaluation of 28 treatments at green house condition. Significantmean square of salinity levels was observed for plant height, pods per plant, 1000-seed weight, seed yield, calcium (Ca), potassium (K) and sodium (Na), indicatingsignificant differences of salinity levels for these traits. The genotypes hadsignificant differences for all the studied traits except Ca. Significant positivecorrelations were detected among plant height and seed yield and other yieldassociated traits including number of pods per plant, 1000-seed weight and K,therefore the genotypes with high plant height in saline environment will have highseed yield and yield associated traits. The genotype L18 with high mean values of1000-seed weight and seed yield was more tolerant to salinity than the othergenotypes.