Effect of foliar application of plant biostimulant and different methods of integrated nutrition on productivity index and yield of sunflower

The sunflower is one of the most important oily plants in the world. To study different methods of chemical fertilizer, biological and manure nutrition with foliar application of plant biostimulant on grain yield in sunflower, a factorial arrangement of treatment in a randomized complete block design with three replications was carried out in a field of Payaam Nour Arak University in Markazi province in the year of 2013. Nutrition methods [N1= 300 Kg ha-1 Urea (Control), N2= 50% of nutrition by Urea + 50% of nutrition by FAM (15-ton ha-1), N3= 50% of nutrition by FAM + 50% of nutrition by nitrogen fixation of Phaseolus sp.), N4= 50% of nutrition by Urea + 50% of nutrition by nitrogen fixation of Phaseolus sp.) and plant bio-stimulants (B1= Foliar with wermiwash, N2= Foliar with enrich wermiwash, N3= Foliar with bio ferment, N4= Foliar with effective microorganisms + quail egg) were assigned in plots. Results indicated that the effect of different levels of nutrition methods on the characteristics such as stem height, dry weight of stem and leaves, grain yield, productivity index of plant and number of grain per m-2 were significant. The Effect of plant bio-stimulants treatment on the characteristics such as stem diameter, dry weight of stem and leaves, grain yield, productivity index of plant, 1000 grain weight and the number of grain per m-2 were also significant. The maximum and minimum of grain yield (3705 and 3133 kg ha-1) were obtained with the 300 Kg ha-1 Urea (Control) and (50% of nutrition by Urea + 50% of nutrition by nitrogen fixation of Phaseolus sp.) treatments, respectively. In the biostimulant treatment, the most and least amount of grain yield with an average of 3744 and 3031 Kg ha-1, were spray of effective microorganisms and enriched vermiwash, respectively.