mehdi taheri asghari; Seyed Reza Miralizadeh Fard
Abstract
In order to investigate the effects of foliar application of humic acid fertilization and mycorrhizal fungi symbiosis on quantitative and qualitative characteristics of Thymus vulgaris L., a factorial layout has been conducted, based on a randomized complete block design with three replications at the ...
Read More
In order to investigate the effects of foliar application of humic acid fertilization and mycorrhizal fungi symbiosis on quantitative and qualitative characteristics of 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 Azad University, Takestan Branch during 2020-2021 and 2021-2022 years. Experimental factors included three species of mycorrhiza fungi (control, Glomus mosseae, G.etunicatum and G.intradices) and humic acid fertilizer levels included (control, 150 and 300 mg.lit-1). The results showed that the Interaction effect of humic acid and mycorrhiza on the percentage and yield of essential oil and yield was significant. The highest yield of essential oil was obtained from the treatment of 150 mg of humic acid and the application of mycorrhiza G. mosseae, which showed a difference and increase of 154% with the control. Also, the highest amounts of p-cymene and -terpinene which are the most important essential oil compounds in thyme, were obtained from the treatment of 300 mg of humic acid, which showed an increase of 23 and 11%, respectively, compared to the control. The highest amounts of 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. With the obtained results, it can be said that by providing suitable growth conditions for thyme medicinal plant using humic acid and mycorrhizal, it is possible to influence their performance and reduce the use of chemical fertilizers.
Sona Mozaffari; Sarah Khorasaninejad; hossein gorgini shabankareh
Abstract
In order to study the effects of irrigation regimes and humic acid applications on some of physiological and biochemical characteristics of Portulaca oleracea L., a greenhouse experiment was conducted as factorial based on completely randomized design with three replications at the research greenhouse ...
Read More
In order to study the effects of irrigation regimes and humic acid applications on some of physiological and biochemical characteristics of Portulaca oleracea L., a greenhouse experiment was conducted as factorial based on completely randomized design with three replications at the research greenhouse of plant production faculty of Gorgan University of Agricultural Sciences and Natural Resources, during of 2014-15. The factors were irrigation regimes including four levels: (25, 50, 75 and 100 percent of field capacity) and four concentrations of humic acid: (0, 200, 400 and 600mg/L). Traits evaluated were proline, RWC, total phenol, flavonoid, antioxidant, soluble carbohydrate and carotenoid content. The results showed that the treatments had significant effects on all the studied traits. Irrigation regimes had significant effect on proline, total phenol, flavonoid, antioxidant, soluble carbohydrate. The highest level of irrigation regimes (25 percent FC) increased proline and decreased RWC and carotenoid. Humic acid had significant effect on all traits except of carotenoid content that were the highest in 400 mg/L humic acid. Interaction effect of humic acid and irrigation regimes was significant for all traits except for total phenol. Irrigation regimes increased antioxidant (12.34%), soluble carbohydrate (36.9%), in 25% and 50% FC, respectively. Generally, the best of treatments is 400mg/L humic acid and 25percent FC, economically. Because the highest yield achieved with low water and humic acid.