effect of drought stress and foliar application of ascorbic acid on the growth and yield of the parameters of sunflower oil

to evaluate the effect of drought stress and foliar application of ascorbic acid on the growth and yield parameters of two varieties of sunflower pilot plant in the province of alborz as a split factorial in a randomized complete block design with four replications and treatments include: water stress (s) in three levels (s1) 70 mm evaporation from pan class a, (s2) 110 mm evaporation from pan class a and (s3) 150 mm evaporation from pan class a in the main plot, and the (v ) on two levels (v1) hybrid lg12 and (v2) f. and sprayed ascorbic acid (a) in three levels (a1) of spraying, (a2) 150ppm ascorbic acid and (a3) ascorbic acid 300ppm in sub are. based on the results, applied in between treatments, the highest grain yield in drought stress a 70 mm evaporation from pan sprayed with ascorbic acid 150ppm, hybrids lg12 with 3214 kg per hectare and the lowest yield in drought stress a 150 mm evaporation from pan sprayed with non-ascorbic acid, graceful figure of 2032 kg per hectare had the highest percentage of oil is worth noting also related to drought stress a 70 mm evaporation from pan sprayed with ascorbic acid 150ppm, hybrids lg12 by 55/40%, respectively.