The reduction of unpleasant effects of drought stress With the application of Zeolite the canola (Brassica napus L.) seeds characteristics

To evaluate the effects of application of Zeolite and different levels of drought stress and vigority of canola seeds, experiment was performed at the research field of Pardise of Aboureihan of Tehran University 2008. Two seeds cultivars autumn canola that were produced in the different conditions of irrigation and different levels of the application Zeolite, was stored in storage for one month and then were used in this experiment. The experiment was based on factorial split plot on a Randomized complete Block Design with three replications, Including without Zeolite application, Zeolite application of 10 ton/ha (Zeolite application of low-level) and Zeolite application of 20 ton/ha (Application of high-level Zeolite) and three levels of the drought stress including, irrigation after 80 millimeter evaporation from class A pan (normal irrigation), irrigation after 120 millimeter evaporation from class A pan (medium drought stress) and irrigation after 160 millimeter evaporation from class A pan (severe drought stress) in factorial based on two varieties of Zarfam and Licord of canola. The results showed that Zeolite application of drought stress Lead to reduced daily green speed and increasing the percentage of the green field, mean daily green and Seedling establishment percentage. Such results also showed that Zeolite application of different irrigation conditions, including normal irrigation and drought stress had no significant effect on the seed oil content. During the study between these two cultivars, Zarfam conditions had higher resistance to drought stress than the other.