Investigating the changes of some essential compounds and effective substances of Thymus vulgaris L. affecting foliar application of humic acid and mycorrhizal species

Document Type : Research Paper

Authors

1 Faculty of Technical and Engineering, Department of Agriculture, Payam Noor University, Tehran, Iran.

2 Agricultural Jihad Organization of Kohgiluyeh and Boyerahmad province, Iran.

Abstract

In order to investigate the effects of humic acid and mycorrhizal fungi symbiosis on Thymus vulgaris L., a factorial layout has been conducted, based on a randomized complete block design with three replications at the field of the research farm of Islamic Azad University, Takestan Branch during 2020-2021 and 2021-2022 years. Experimental factors included three species of mycorrhiza fungi (control, G. mosseae, G.etunicatum and G.intradices) and humic acid fertilizer levels included (control, 150 and 300 mg.lit-1). The results showed that the effect of mycorrhiza and humic .on chlorophyll a and b was significant. The highest .carotenoid was obtained from the application of 300 mg/liter of humic acid and G. mosseae, which showed a 256% increase compared to the control. The results showed that the highest amount of phenolic compounds was obtained from the application of 300 mg/liter of humic acid without inoculation but humic acid treatments did not show any significant difference with G. mosseae mycorrhiza treatment. Also, the interaction effect of mycorrhiza and humic acid on essential oil yield limonene and linalol essential oil compounds was significant at the level of 1%. 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 254% increase compared to the control. The highest amount of limonene and linalol was obtained from the application of 300 mg/liter of humic acid and G. mosseae mycorrhiza, which showed an increase of 250 and 280%, respectively, compared to the control.

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Iranian Journal of Field Crop Science
Volume 55, Issue 4
December 2024
Pages 117-129

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History

  • Receive Date: 08 April 2024
  • Revise Date: 30 April 2024
  • Accept Date: 17 May 2024
  • Publish Date: 21 December 2024

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