The use of water with different saline frequencies for irrigation of rapeseed cultivars

In order to investigate the effect of irrigation by saline water in different growth stages on agronomical characteristics of rapeseed cultivars¡ this experiment was carried out by split plots design with 3 replications in 2010. The main factor was 3 levels of irrigation water ( ¡ 10 and 12 ds/m) and the sub factor was sparing rapeseed cultivars including (Option 500¡ Hayola 401 and Heros). The results showed that salt stress had significant effect on biological yield¡ kernel yield¡ oil yield¡ oil percentage¡ branches number¡ silique number¡ silique number of branches¡ silique length of branches¡ seed number of main silique¡ seed number of silique and seed number of branches silique (P=0/01)¡ harvest index¡ 1000 kernels weight and plant height (P=0/05) and highest upon characteristics were achieved under irrigation with 6 ds/m. Rapeseed varieties showed significant differences upon characteristics. Means comparison showed that highest kernel yield (2245 kg/ha) was achieved under Option 500 variety. Interaction of irrigation and variety wasn’t significant effect on all characteristics but means comparison showed that highest kernel yield (3108 kg/ha) was achieved under Option 500 variety under irrigation with 6 ds/m. The results of this experiment showed that irrigation by saline water decreased agronomical characteristics of rapeseed sorely and expedited flowering stage.