| Abstrakt: |
Objective: The purpose of this experiment was to investigate the effects of foliar application of humic acid and mycorrhizal fungi symbiosis on the quantitative and qualitative characteristics of Thyme (Thymus vulgaris L.) Methods: This experiment was conducted with factorial layout based on a randomized complete block design with three replications in the research farm's field of the Azad University, Takestan Branch, during 2020-2021 and 2021-2022. The experimental factors included three species of mycorrhiza fungi (control, Glomus mosseae, G.etunicatum, and G.intradices), and humic acid fertilizer levels (control, 150, and 300 mg.lit-1). Results: The results showed that the interactive effect of humic acid and mycorrhiza on the percentage and yield of essential oil and yield was significant. The highest essential oil yield was obtained from the treatment of 150 mg of humic acid and the application of mycorrhiza G. mosseae, which showed a 154% increase over the control. Additionally, the highest p-cymene and -terpinene, which are the most important essential oil compounds in thyme, were obtained from 300 mg of humic acid, demonstrating an increase of 23 and 11%, respectively, compared to the control. The highest p-cymene and -terpinene were obtained from the treatment of mycorrhiza G.mosseae, which showed an increase of 21 and 26%, respectively, compared to the control. Conclusion: Based on the results obtained, it can be stated that by providing suitable growth conditions for thyme medicinal plants using humic acid and mycorrhizal fungi, it is possible to influence the plants' performance and reduce chemical fertilizers consumption. [ABSTRACT FROM AUTHOR] |
