بررسی اثر مصرف کودهای زیستی و روی بر عملکرد و اسانس گیاه دارویی مرزه

In order to study the effect of bio-fertilizers and zinc on yield and essential oil of savory herbs an experiment was conducted as a randomized complete block design with three replications at the Agricultural Research Station, University of Maragheh in 2013. Treatments were bio-fertilizers (non-inoculated seeds, seeds inoculated with Nitroxin and seeds inoculated with Super nitro plus) and foliar application of plants with zinc sulfate (0, 2.5 and 5 per thousand cocentrations). Results showed that the effect of bio-fertilizers and zinc on yield, essential oil content and essential oil yield were significant. The highest dry yield of savory obtained from seed inoculation with Super nitro plus that had 22.6 % diffrences with control. About essential oil and essential oil yield both Nitroxin and Super nitro plus bio-fertilizers led to increases in the values compared to control. Zinc foliar application treatments with concentrations of 2.5 or 5 per thousand with no significant differences with each other increased all traits were studied. The maximum essential oil percentage obtained from zinc foliar application 5 per thousand with Super nitro plus seeds incubation, 2.5 per thousand with Nitroxin seeds incubation and 5 per thousand with Nitroxin seed inculcation, respectively. These treatments increased essential oil of savory an average 35.5% compared to control.