Effect of Biofertilizers and Foliar Application of Iron and Zinc on Some Morphological and Biochemical Traits of Dill (Anethum graveolens L.)

Today, the use of medicinal plants as one of the most effective methods in the field of health and business is increasing. Among the required factors, micro-elements elements play a significant role in feeding and increasing of plant yield. In recent years, due to the prevent the harmful effects of chemical fertilizers, the application of biofertilizers has been considered. The present study was conducted to investigate the yield, yield components, and essential oil of the dill plant in response to phosphozist and nitrozist and foliar application of zinc and iron elements. The experiment was conducted as a randomized complete block design with three replications. Experimental treatments included foliar application with zinc, iron and combined application of zinc and iron, and biofertilizer treatments consisted of application of phosphozist biofertilizer, pbt of nitrozist biofertilizer, combined pbt of phosphozist and nitrozist biofertilizers and control.The results showed that the highest plant height, number of umbels per plant, number of seeds per umbel, percentage and yield of shoot essential oil were achieved from the combined application of nitrozist and phosphozist. There was no significant difference with foliar application of zinc and iron. In terms of grain yield, root dry weight and percentage and yield of grain essential oil, the application of these biofertilizers was significantly superior to other treatments. Based on results, in order to produce more yield, yield components and essential oil in dill, the combined application of nitrozist and phosphozist biofertilizers was identified as the most desirable nutritional treatment.