The Role of Separated and Integrated Application of Organic and Biological Inputs on N, P, K Concentration, Essential Oil of Dragonhead (Dracocephalum moldavica L.)

The effects of organic and biological inputs application on N, P, K concentration, essential oil content and yield of dragonhead (Dracocephalum moldavica L.), examined by randomized complete blocks design with eight treatments and three replications at research field of Agriculture Company of Ran in Firouzkuh of Iran in 2015. The treatments were 20 t.ha-1 manure, 10 t.ha-1 vermicompost, biofertilizer (Nitroxin Bio Super Phosphat), 10 t.ha-1 manure 5 t.ha-1 vermicompost, 20 t.ha-1 manure biofertilizer, 10 t.ha-1 vermicompost biofertilizer, 10 t.ha-1 manure 5 t.ha-1 vermicompost biofertilizer and chemical fertilizer (NPK: 80, 70 and 80 kg.ha-1). The results showed that treatments had significant effects on studied traits (except K concentration), as the highest N and P concentration in flowering shoot and herbage yield were obtained with integrated application of 10 t.ha-1 vermicompost and biofertilizr, application of 20 t.ha-1 manure and integrated application of 10 t.ha-1 manure and 5 t.ha-1 vermicompost respectively. The highest essential oil content and yield were obtained with 10 t.ha-1 vermicompost application. It seems that organic and bio-fertilizers can consider as a replacement for chemical fertilizers in dragonhead plant production in organic cultivation.