پاسخ ارقام مخلف کلزا به تاریخ‌های مختلف کاشت

In order to study the effect of sowing date on grain and oil of three canola cultivars, an experiment was carried out based on split plot in randomized complete block design with four replication in Agriculture and Natural Research Resource Center of Ilam, Iran during 2005-2006 cropping season. Sowing date factor at four levels (5th September, 2d October, 17th October and 1st November) was assigned as main factor and three canola cultivars (Talayeh, Zarfam and Okapi) were chosen as subplot. The present result of this study showed that sowing date had significant effect on grain yield and oil yield. The highest seed yield with 3622 and oil yield with 1387.2 kg.ha-1 were obtained from sowing date of the 2d October Zarfam cultivar has the highest yield due to grains per pod, 1000-grain weight and number of pod in main branches. Interaction effect of sowing date and cultivar was significant effect on studied traits. The highest grain yield and oil yield were obtained from sowing date of the 2d October and Zarfam.