shocofeh gholami; majid amini dehaghi
Abstract
Due to its antioxidant properties, selenium has an effective role in increasing plant tolerance to adverse environmental effects.To determine the optimum concentration and priming time of quinoa seed by selenium, a factorial experiment based on a completely randomized design with three replications was ...
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Due to its antioxidant properties, selenium has an effective role in increasing plant tolerance to adverse environmental effects.To determine the optimum concentration and priming time of quinoa seed by selenium, a factorial experiment based on a completely randomized design with three replications was carried out in the Shahed University Tehran/Iran in 2019. Experimental treatments included was different concentrations of Selenium in six levels (0, 0.5, 1.5,3,4.5,6 mg/l) and the second factor was priming time in four levels (0, 8, 12 and 24hours). The results showed Simple and interaction effect of experimental treatments on traits on germination percentage, was significant (p<0.01) on germination percentage, germination rate, mean germination time, mean daily germination, daily germination rate, germination rate coefficient, seedling length, seedling dry weight, index Longitudinal vascular length and seedling vigor weight index. Across all with the concentration of selenium increased From 0 to 3 mg / L, a significant increase was observed in most of the mean traits and with increasing selenium concentration above 3 mg / L, there was a decreasing trend in the mean traits. The highest percentage of germination (96.33) at a concentration of 3 mg / l selenium for 8 hours showed an increase of 23.5% compared to the control treatment. Also, the highest mean germination time was 6 mg of selenium and 24 hours of priming had an increase of 41.3% compared to the control treatment. Therefore, in order to improve the germination of quinoa, better results can be obtained by priming the seeds using selenium.
Siavash Heshmati; Gholam Akbari; elias soltani; Majid Amini Dehaghi; Kayvan Fathi Amirkhiz; Keyvan Maleki
Abstract
In order to study the foliar application of melatonin on plants grown from safflower in different seed qualities under drought condition, two field experiments have been carried out at research farm of Aburaihan Campus, University of Tehran, between 2017 and 2018 growing seasons. The experimental design ...
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In order to study the foliar application of melatonin on plants grown from safflower in different seed qualities under drought condition, two field experiments have been carried out at research farm of Aburaihan Campus, University of Tehran, between 2017 and 2018 growing seasons. The experimental design is split-factorial in a randomized complete block design with four replicates, with the treatments being consisted of two levels of drought stress (1- normal irrigation (no-stress) and 2- irrigation after reaching 85% of soil moisture depletion of field capacity at flowering stage (drought stress)), in the main plots. The subplots include 4 treatments, including a factorial combination of seed quality (stored seed and recently harvested seeds) and foliar application (the control and melatonin foliar application). Results from these experiments illustrate that melatonin foliar application has significantly increased the seed yield of stored seed by 589Kg.ha-1, compared to the control. It is also shown that SOD and CAT activities have been increased in response to melatonin in plants grown from recently-harvested seeds under drought condition. Furthermore, it is indicated that foliar application of melatonin decrease the amount of leaf soluble proteins by 28% in plants grown from recently-harvested seeds under drought conditions. According to the results, the amount of malondialdehyde is decreased by 37% in plants grown from recently-harvested seeds by foliar application of melatonin under drought conditions. It seems that seed quality has an enormous influence on grown plants and that using melatonin may play a substantial role in ameliorating the injuries derived from stress on safflower plant.
Zeynab- Kobra Pishva; Majid Amini-Dehaghi; Amir Bostani; Amir-Mohammad Naji
Abstract
In order to study the effect of nitrogen fertilizer treatments on yield traits, essence percentage, and the amount of nitrogen in cumin stem and leaves under different irrigation regimens, an experiment has been conducted as split plot based on randomized complete block design with three replications ...
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In order to study the effect of nitrogen fertilizer treatments on yield traits, essence percentage, and the amount of nitrogen in cumin stem and leaves under different irrigation regimens, an experiment has been conducted as split plot based on randomized complete block design with three replications in the 2016-2017 crop season at the Research Field of Agriculture Faculty, Shahed University, Tehran, Iran. In this experiment, the main plot is consisted of different irrigation regimes at three levels (no stress, mild stress or irrigation based on draining 40% of available water, and severe stress or irrigation based on draining 80% of available water) and the subplot includes four levels of nitrogen fertilizer treatments (100% and 50% fertilizer recommendation of nitrogen (urea), seed stained biofertilizer application (Nitroxin), and combination treatment of biofertilizer and 50% fertilizer recommendation nitrogen). The results show that increasing deficit irrigation at a mild level and, above that, at a severe level, while increasing the percentage of essence, has had a significant negative effect on yield and yield components, total chlorophyll, shoot nitrogen concentration, and essence yield. Application of combination nitrogen fertilizer (urea + Nitroxin) while increasing the yield and yield components of Cumin, increase the percentage and yield of essence, and shoot nitrogen concentration, generally causing the most desirable quantitative and qualitative yield of Cumin.
Niki Ayoubizadeh; Ghanbar Laei; Majid Amini dehaghi; jafar masoud sinaki; Shahram Rezvan Bidokhti
Abstract
Evaluation the effect of drought stress and foliar nutrition of iron nano-chelate and fulvic acid on grain yield and fatty acids composition in seed oil of two sesame cultivars was conducted during a factorial split-plot experiment based on randomized complete block design with three replicates in 2017 ...
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Evaluation the effect of drought stress and foliar nutrition of iron nano-chelate and fulvic acid on grain yield and fatty acids composition in seed oil of two sesame cultivars was conducted during a factorial split-plot experiment based on randomized complete block design with three replicates in 2017 in the Research Farm Shahed University of Tehran. The experimental factors included drought stress in three levels: full irrigation as control, irrigation up to 50% seed ripping, and flowering, as well as four treatments of foliar nutrition by iron nano-chelate and fulvic acid in Dashtestan and Halil cultivars. The results showed that the drought stress reduced grain yield and also, seed oil content. The highest grain yield was observed in full irrigation (2303.3 kg/ha) and the co-application of iron nano-chelate and fulvic acid (2246.4 kg/ha). Halil cultivar had the highest mean of the total number of capsules (81.19), number of seeds per plant (4786.1), 1000-grain weight (3.21 g), grain yield (2172.7 kg/ha), and biological yield (13534.6 kg/ha) in compared with Dashtestan. The highest oil and protein yield were observed in full irrigation and irrigation up to 50% seed ripping. Irrigation cut off at 50% flowering and seed ripping had the highest oleic and linoleic fatty acids compared to the control treatment, but the highest palmitic and stearic fatty acids were obtained in full irrigation treatment (10.86 and 10.73%, respectively). Halil and Dashtestan cultivars had the highest unsaturated and saturated fatty acids, respectively.
Akram Mahdavi; Jafar Masoud Sinaki; Majid Amini dehaghi; Shahram Rezvan; Ali Damavandi
Abstract
In order to evaluate the effects of chemical, biological and nano fertilizers on the yield and quality traits (oil and protein) of sesame seeds under different irrigation regimes an experiment was conducted as a split-plot factorial based on completely randomized blocks design with three replications ...
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In order to evaluate the effects of chemical, biological and nano fertilizers on the yield and quality traits (oil and protein) of sesame seeds under different irrigation regimes an experiment was conducted as a split-plot factorial based on completely randomized blocks design with three replications at Shahed University during 2015-2016 growing seasons. Irrigation withholding levels (full irrigation (control) and irrigation withholding at 65 and 75 BBCH (codes of phonological stages that are equivalent to 50% of flowering and seed ripening respectively) were assigned as main plot and different nitrogen combinations (nitroxin, urea, and a mix of 50% nitroxin plus urea), various combinations of potassium (not used, nano-potassium foliar application (2 per thousand), irrigated use of potassium dioxide (2 L ha−1) and soil application of nano-potassium (2 kg ha−1) were allocated in the subplots. The highest number of per-plant capsules (19.26 numbers) was observed with irrigation up to 50% seed ripening and the use of urea together with the potassium nano chelate foliar application. The greatest grain yield and protein content and yield were obtained in irrigation up to 50% seed ripening in the absence of potassium fertilizer and nitroxin usage (1340.5, 276.53 kg ha−1 and 5-20%, respectively). The oil yield was utmost in irrigation up to 50% flowering and foliar application of potassium nano chelate together with the mixed system of 50% urea fertilizer plus nitroxin with average values of 47.96% and 550.46 kg ha−1, respectively. The use of nitroxin as a nano-bio-fertilizer and foliar application of chelated nano potassium in irrigation withholding conditions up to 50% grain aggregation resulted in increased grain yield (approx. 15% compared to the control) as well as improved quality of sesame seeds.
shahla shafiee adib; Majid Amini Dehaghi; Fatemeh Shahbazi
Abstract
In order to study of the effects of vermicompost and chemical phosphorous fertilizers on the quantity and quality of John’s wort, an experiment was conducted as factorial experiment based on randomized complete blocks design with three replications in Shahed University, Tehran during two years ...
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In order to study of the effects of vermicompost and chemical phosphorous fertilizers on the quantity and quality of John’s wort, an experiment was conducted as factorial experiment based on randomized complete blocks design with three replications in Shahed University, Tehran during two years of 2011-2012. Treatments were phosphorous fertilizer (0, 100 and 200 kg.h-1) and vermicompost (0, 5 and 10 t.h-1). Agronomic characteristics were including plant height, flowering shoot yield, biological yield, hypericin yield and harvest index.There were significant differences in vermicompost and phosphorous fertilizer treatments and interaction between them Pr < 0.01.The maximum hypericin yield and flowering shoot yield was obtained by applying 200 kg.ha-1 phosphorous fertilizer plus 5 ton.h-1 vermicompost and 200 kg.ha-1 phosphorous fertilizer plus 10 ton.h-1 vermicompost, respectively. It seems that chemical phosphorous fertilizer and vermicompost can increase quantity and quality yield in John’s wort medicinal plant.
Mina Agha Baba Dastjerdi; Majid Amini Dahaghi; Mohammad Reza Chaichi; Zeynab Bosaghzadeh
Abstract
To study the effect of different fertilization systems on forage quality and secondary metabolites ofmedicinal forage in additive intercropping of alfalfa and fennel an experiment was conducted as split plotbased on randomized complete block design with three replications at College of Agriculture, ShahedUniversity ...
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To study the effect of different fertilization systems on forage quality and secondary metabolites ofmedicinal forage in additive intercropping of alfalfa and fennel an experiment was conducted as split plotbased on randomized complete block design with three replications at College of Agriculture, ShahedUniversity in Tehran, 2011. The main plots were allocated to different levels biofertilizer and chemicalfertilizer phosphorus in four levels viz. 1. Control (no fertilizer), 2. Biofertilizer (Nitroxin,biophospherous fertilizer 2), 3. Integrated fertilizer (bio fertilizers+ 50 percent chemical fertilizer), 4.Chemical fertilizer (triple super phosphate). The subplots were allocated to different combinations of 1.Sole alfalfa, 2. Sole fennel, 3. 100 percent alfalfa+ 50 percent fennel, 4. 100 percent alfalfa+ 100 percentfennel. Results showed that the highest amount of crude protein was obtained in alfalfa+ 50 percentfennel at control treatment and the highest dry matter digestibility in sole alfalfa at integrated fertilizingsystem. The lowest percentage of essential oil was obtained in alfalfa+ 50 percent fennel at integratedfertilizing system.