The Effect of Chelate Microelement (Jadogar) on Yield and Yield Components of Sunflower at Different Levels of Plant Densities

In order to study of the effects of microelements chelate fertilizer (Jadogar) on yield and yield components of sunflower (Helianthus annus L.) at different levels of plant densities, a field experiment was carried out as factorial based on randomized complete block design with 4 replications in Shahrood University of Technology. Factors included plant distance on the row in 5 levels (10, 20, 30, 40, 50 and 60 cm) and microelements chelate fertilizer (Jadogar) at 2 levels (without apply of micronutrient and micronutrient apply). The results showed that increasing of density increased vegetative growth period. Increasing of plant density had positive effect on plant height and negative effect on stem diameter. Plant distance on the row (20 cm) increased grain and biological yield. Using micronutrient through increasing of seed number in anthodium and increasing density through increasing the number of anthodium significantly affected grain yield. Using micronutrient resulted improvement of oil percentage and grain yield. Plant density had no significant effect on oil percentage. Planting density were completely coordinated with grain yield changes so that the major part of the oil yield changes can be defined by grain yield.