Elements uptake in Balm (Melissa officinalis L.) under the effect of mycorrhiza and Piriformospora indica and vermicompost

In order to investigate the effect of vermicompost, mycorrhiza and semimycorrhiza(Piriformospora indica) on some micro and macro elements of Balm (Melissa officinalis L.), this experiment was conducted in the Alborz research station, Research Institute of Forests and Rangelands, Karaj, Iran, in 2012. The experiment was conducted as factorial in a randomized complete blocks design with three replications. Factors included vermicompost at three levels (0, 5 and 10 t/ha), and inoculation with biofertilizers at four levels (control, inoculation with Glomus mosseae. intraradices, Piriformospora indica, and Glomus mosseae. intraradices㸪諦ꋊ梭 indica). Results indicated that vermicompost and biofertilizer significantly affected the content of potassium, phosphorus, calcium, magnesium, iron, zinc, manganese and cooper (p