Effect of Polyamine, Boron and Molybdenum Growth Stimulant Spray before Flowering on Yield and Indices of SafflowerGrowth

This research was done to study effect of polyamine, boron and molybdenum growth micronutrients spray on yield and indices of growth in Padideh and Mahali Esfahan Cultivars of Safflower in a factorial test based on randomized complete block deign with four replications in agricultural year of 2011-2012 in Damghan city. Test treatments included control (without spray) and spray before flowering (vegetative phase) and the tested cultivars were Mahali Esfahan and Padideh. The evaluated traits included percent of oil, Grain Weight (1000 Seeds), plant height, diameter of stem, harvest index, and the number of capitols per plant. The presence of significant interaction between mean levels of cultivar and spray before flowering in plant height trait in Padideh cultivar (74.75 cm) and Mahali Esfahan cultivar (68 cm) showed that behavior of cultivars to spray levels was different. Generally, mean of spray before flowering was improved compared to the control sample in grain oil (39.29%), capitols per plant (29.23), plant height (30.90 cm) and diameter of stem (45.05 mm). in this test, mean of Mahali Esfahan cultivar was preferred to Padideh cultivar in grain oil (11.56 %), capitols per plant (33.46), harvest index(27.64%) and plant height (73.50 cm). Padideh cultivar was preferred to Mahali Esfahan cultivar in grain weight (1000 seeds) (32.50 grams) and diameter of stem (12.72 mm). In this test, positive and significant correlation between percent of oil and traits of plant height and harvest index was proved. Generally, one can conclude that Mahali Esfahan cultivar was better with the highest growth index.