Investigating the effect of several biological inputs on the quantity and quality of essential compounds of medicinal plant (Matricaria chamomilla) in Ardabil province

An experiment was conducted in 1401 in the lands of Andzaq village, Meshgin Shahr city, located in Ardabil province. Application of vermicompost: at two levels of zero (V0) and 5 tons per hectare as soil application before planting (V1), application of growth promoting bacteria (PGRP) as inoculation with seeds, at 2 levels: inoculation with a mixture of 2 Azospirillium and Azotobacter bacteria (F1) and without inoculation (F0), - Nitrogen from urea source: in 3 levels zero (N0) and 50 (N50) and 100 kg/ha (N100) in pure form. The results showed that the combined use of vermicompost and inoculum has a synergistic effect and growth-promoting bacteria with vermicompost can work in a better environment and substrate and can fix nitrogen. So that the effect of vermicompost in improving the percentage of essential oil in different levels of nitrogen varies from 15% in N0 to 3% in N50 and up to 10% in N100. The effect of using different levels of nitrogen on the yield of essential oil was very significant, so that the use of 100 kg of nitrogen was about 79% effective on the yield of essential oil, and the use of 50 kg of nitrogen was also about 42% effective on the yield and the yield reached 836 kg. In high amounts of nitrogen, the percentage of camazolin increased. The lowest amounts of alpha-bisabolol amount to 19.4%, 19.8, 20.7 and 21.