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 ...
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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.
hossein gorgini shabankareh; sarah khorasaninejad
Abstract
In order to study the effects of salicylic acid levels and bio-fertilizers on the growth characteristics, essential oil yield and elements concentration of Rosmarinus officinalis, an experiment was conducted as factorial based on randomized complete block design with three replications at research farm ...
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In order to study the effects of salicylic acid levels and bio-fertilizers on the growth characteristics, essential oil yield and elements concentration of Rosmarinus officinalis, an experiment was conducted as factorial based on randomized complete block design with three replications at research farm of Gorgan University of Agricultural Sciences and Natural Resources, during growing season of 2015-16. The treatments were salicylic acid including three levels: (0, 5 and 10 mlg/l), two concentrations of bio-fertilizers (nitroxin, biophosphor) and four levels of irrigation regimes: (40, 60, 80 and 100 %The results showed that irrigation regimes had significant effect on shoot height, wet and dry weight, number of shoot, essential oil yield and Nitrogen and Phosphorus. Salicylicacid with 10 mlg/l had significant effect on all of traits and this effect was increased of salicylicacid. Nitroxin increased all of the traits except of P and salicylicacid was caused to decrease negative effects of low irrigation regimes. The highest of shoot height, plant wet and dry weight, shoot number, nitrogen and essential oil yield were obtained with nitroxin and 100percent FC irrigation regime and highest of essential oil yield and P were observed in 40percent FC irrigation regime. Also the highest amount of P was obtained with biophosphor and 100percent FC irrigation regimes. The results of this research showed that the using of bio-fertilizers and salicylic acid can be useful for reducing drought stress.
Abbas Alizade ahmad abadi1; sarah khorasaninejad; Khodayar Hemmati
Abstract
In order to study the effects of Humic acid levels and irrigation regimes on the some morphological and biochemical characteristics of Echinacea purpurea L., a pot experiment was conducted as factorial based on randomized complete block design with three replications and four experimental units at research ...
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In order to study the effects of Humic acid levels and irrigation regimes on the some morphological and biochemical characteristics of Echinacea purpurea L., a pot experiment was conducted as factorial based on randomized complete block design with three replications and four experimental units at research farm of Gorgan University of Agricultural Sciences and Natural Resources, during growing season of 2014- 15. Treatments were four levels of irrigation regimes (40, 60, 80 and 100 percent field capacity) and humic acid including four levels: (0, 250, 500 and 1000 mg/kg). The results showed that irrigation regimes had significant effect on all measured properties except root length. Humic acid increased all of the growth caractristics and morphological traits in 5% level statistically, while had significant effect on total flavonoid and increased it. Interaction effect of humic acid and irrigation regimes was significant for wet and dry weight of root and shoot, total phenol and flavonoid. Therfore, the limited irrigation had negative effect on growth and plants increased their phenol and antioxidant components to stress coping. Humic acid increased growth and yield in plants that were faced with stress.
Sarah Khorasaninejad; hassan soltanloo; seyedeh sanaz ramezanpour; javad hadian; Sadegh Atashi
Abstract
The current research was carried out according to a completely randomized design with three replications to study the effect of drought stress on growth parameters, essential oil constituents and yield of lavender at Gorgan University of Agricultural Sciences and Natural Resources in 2012. Five levels ...
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The current research was carried out according to a completely randomized design with three replications to study the effect of drought stress on growth parameters, essential oil constituents and yield of lavender at Gorgan University of Agricultural Sciences and Natural Resources in 2012. Five levels of water deficit stress including D1 (100 percent FC, control), D2 (85 percent FC), D3 (70 percent FC), D4 (55 percent FC) and D5 (40 percent FC) were investigated during four months. Results indicated that drought stress motivated a significant influence in all of the growth parameters and essential oil yield and percent (P<0.05). In decrease in soil water lead to reduce in stem length, shoot wet weight, root wet weight and root dry weight and increase in length of root and essential oil percent, at first, and then reduction in this two parameters. Reduction in growth parameters lead to reduce in number of flower in 5th level, therefor leaves essential oil were analysed because of uniformity in results. The highest values of essential oil percent were obtained under 85percent field capacity. The most important of essential oil component is Borneol that increased. The least values of Camphor were obtained under 85 percent field capacity. Also, the medium level of drought stress caused to icrease in percent and quality of lavender essential oil. .