ارزیابی تأثیر محلول‌پاشی سایتوکینین بر عملکرد دانه و روغن چهار رقم گلرنگ بهاره

In order to study the possibility of increasing the yield of four spring safflower cultivars by application of cytokinin, a research was carried out in factorial on randomized complete block design with four replications in Research Farm of Zanjan University in 2010-2011. In this study first factor was four levels of spring safflower cultivars (Goldasht, Zendehrood, MEC191 and sina) and second factor was four times of cytokinin application (no application or control, at the stage of lateral buds development, at the stage of anthesis and at the stage of seed filling). Cytokinin by the concentration of 50 was sprayed in the stage of lateral buds development, anthesis and seed filling. The results showed that application of Cytokinin in the stage of anthesis increased the seed yield, harvest index and oil yield. MEC191 with application of Cytokinin in the stage of anthesis had the highest seed yield (with an average of 5120.1 kg/ha) and oil yield (with an average of 1659.4 kg/ha) so that application of cytokinin in the stage of anthesis increased the seed yield and oil yield by 58.79 and 60.90 percent in contrast to the control.