Effect of seed priming on grain and oil yield of Safflower underirrigation deficit conditions

In order to effect of seed priming on oil, grain yield of Safflower under irrigation deficit conditions a split plot experiment based on randomized complete block design was conducted with three replications in 2012-2013 growing seasons in research farm of Payame-Noor University of Zabol. Irrigation in three levels  included; I1= Irrigation in all growth stages (rosset, stem elongation, heading, flowering, and grain filling), I2=Irrigation interruption in rosset, stem elongation, heading and irrigation in flowering, and grain filling), I3=Irrigation in growth stages rosset, stem elongation, heading and interruption irrigation in flowering, and grain filling were main plot and seed priming  in five levels included; P1=Non- Primed (control), P2=Hydropriming, P3=Primed with 1% ZnSO4 P4=Primed with 1% KNO3 P5=Primed with 2% KNO3 were sub plots. The results showed that  number head in plant, grain in head, 1000 grain weight ,oil and grain yield in I2 and I3 treatments decreased as soil available moisture was reduced. Rate decreased grain yield in treatments was 20 and 45 %, respectively. The oil percentage and grain yield was higher in seeds osmopriming with 1% ZnSO4 and 2% KNO3 compared to non prime 19 and 14 %, respectively. Based on results in spring plant of  safflower must be take irrigation in all of growth stages and seeds priming than to non prime seed to be superior.