Nader Khadem Moghadam Igdelou; Ahmad Golchin; Khadije Farhadi
Abstract
In order to study the effect of Cobalt, Molybdenum, and Nitrogen on the growth of Phaseolus vulgaris in soilless culture, a pot experiment was conducted in 2015-16 and in July, at 25˚C and light intensity of 40,000 lux as a factorial based on a CRD with 36 treatments and three replications in the greenhouse ...
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In order to study the effect of Cobalt, Molybdenum, and Nitrogen on the growth of Phaseolus vulgaris in soilless culture, a pot experiment was conducted in 2015-16 and in July, at 25˚C and light intensity of 40,000 lux as a factorial based on a CRD with 36 treatments and three replications in the greenhouse of Zanjan University. The test factors consisted of four levels of Nitrogen (50, 100, 150, and 200 mg/l), three levels of Molybdenum (0.067, 0.2, and 0.6 mg/l) and, three levels of Cobalt (0.006, 0.06, and 0.3 mg/l). Factor levels were prepared by adding ammonium nitrate, ammonium molybdate, and cobalt chloride to a stock solution. Results of morphological traits showed that the highest pod dry weight was obtained in N100Mo0.6Co0.06 treatment which had a maximum difference of 47.9% with other treatments. The highest dry weight of shoots was obtained from N150Mo0.6Co0.006 treatment and the highest root dry weight was obtained from N150Mo0.6 and N150Co0.3 treatments. Also, the highest number of pods was obtained in N150Mo0.6, N100Co0.3 and Mo0.6Co0.3 treatments with values of 235.2, 266.4, and 220.8 g/pot, respectively. Investigation of physiological traits showed that the highest concentrations of Nitrogen, Molybdenum, and Cobalt were obtained from N200Mo0.6Co0.3, N150Mo0.6Co0.3, and N150Mo0.067Co0.006 treatments, respectively. Overall, it can be stated that the application of N100Mo0.6Co0.06 treatment can positively affect the dry weight of pods, which are economically productive and improve the performance of P. vulgaris (Talash cultivar).
Nader Khadem Moghadam Igdelou; Ahmad Golchin; Khadije Farhadi
Abstract
Elements such as nitrogen (N), molybdenum (Mo), and cobalt (Co) are needed to improve the quantity and quality of beans. In order to study the effects of these elements on pod yield and concentration of nutrients in bean, a factorial pot experiment was conducted in 2016 in greenhouse conditions at University ...
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Elements such as nitrogen (N), molybdenum (Mo), and cobalt (Co) are needed to improve the quantity and quality of beans. In order to study the effects of these elements on pod yield and concentration of nutrients in bean, a factorial pot experiment was conducted in 2016 in greenhouse conditions at University of Zanjan, using a CRD with three replications. The experimental factors consisted of four levels of N (50, 100, 150, and 200 mg/l), three levels of Mo (0.067, 0.2, and 0.6 mg/l), and Co (0.006, 0.06, and 0.3 mg/l). The results showed that the highest dry weight of pods was obtained from treatment of N100Mo0.2Co0.06 which was 34.05 g/pot and had no significant difference with N150Mo0.6Co0.06 treatment. The application of different levels of factors increased the concentrations of N, P, and Mg in bean leaves in treatments of N200Mo0.6Co0.3, N200Mo0.6Co0.006, and N150Mo0.6Co0.3 and the highest increase in concentrations of mentioned elements were 6.94, 0.91, and 0.41% respectively. However, the concentrations of K and Ca decreased as a result of the application of the factors. The highest concentrations of Fe, Mn, Cu, Mo, and Co bean were measured in treatments of N200Mo0.6Co0.006, N150Mo0.2Co0.006, N200Mo0.6Co0.3, N150Mo0.6Co0.3, and N150Mo0.067Co0.006 which were 490, 185.4, 8.26, 284.5, and 54.9 mg/kg, respectively. Overall, according to the results, N100Mo0.2Co0.06 is recommended for bean.
Ahmad Golchin; Faezeh Farahmand Mofrad; Nader Khadem Moghadam Igdelou
Abstract
Peppermint is an important medicinal and aromatic plant which its oil content varies from one region to another region and as a function of fertilization, shadow, irrigation, and photoperiod. In order to study the effect of different levels of shadow and nitrogen on growth and oil performance of this ...
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Peppermint is an important medicinal and aromatic plant which its oil content varies from one region to another region and as a function of fertilization, shadow, irrigation, and photoperiod. In order to study the effect of different levels of shadow and nitrogen on growth and oil performance of this plant, a factorial experiment was conducted using a completely randomized design with three replications in the Faculty of Agriculture, University of Zanjan during the 2014-2015 cropping season. The experimental factors were, shadow factor in four levels (S0: without shadow, S25: 25%, S50: 50%, and S75: 75% shadow) and nitrogen factor as Urea in four levels (N1: without nitrogen, N2:60, N3:120, and N4:180 mg N/kg). The results showed that the highest number of leaves per plant (936), leaf surface area (1688mm2), chlorophyll index (51.32), essential oil content (2.455%), and essential oil yield (0.37 g/box) were obtained from the S25N3 treatment. The highest shoot dry weight was measured in the S50N4 treatment and the S25N3 treatment with 8.36% difference stood in the second place. The highest leaf dry weight was observed in S25N3 (11.55 g/box). Treatments applied to plant height and numbers of branches were not significantly affected. Therefore, to obtain the highest concentration and performance of essential oil in peppermint, as well as to increase the number of leaves per plant and leaf surface area for marketable and edible consumption, the use of 25% shadow and the application of 120 mg/kg nitrogen are recommended.
Mohammad Hadi Mirzapour; Ahmad Golchin; Amir Hosein Khoshgoftarmanesh; Mohammad Medi Tehrani
Abstract
The role of amino acids on root uptake and root-to-shoot translocation of micronutrients is of great importance to improve plant nutrition management. In this nutrient solution culture experiment, the effect of application of 100μM tryptophan, arginine and histidine on the uptake and root-to-shoot ...
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The role of amino acids on root uptake and root-to-shoot translocation of micronutrients is of great importance to improve plant nutrition management. In this nutrient solution culture experiment, the effect of application of 100μM tryptophan, arginine and histidine on the uptake and root-to-shoot translocation of zinc (Zn) and iron (Fe) in rapeseed with three Zn levels (0, 5 and 10μM as zinc sulfate) was investigated. The results showed at the 5μMZn, application of arginine and tryptophan significantly reduced the shoot dry weight compared to the amino acid-free, while at the 5μMZn, the use of histidine resulted in a significant increase in the plant shoot dry weight. The highest plant shoot Zn uptake was found at the 10μMZn plus histidine. Application of 10μMZn in the presence of arginine led to a significant increase of root Zn uptake as compared to the amino acid-free while no such effect was found in the presence of other amino acids. In the presence of amino acids, except arginine, increasing Zn concentration in the nutrient solution to 10μM resulted in lower shoot and root Fe uptake in comparison with amino acid-free. In contrast, at 10μMZn treatment, application of arginine enhanced plant shoot and root Fe uptake. The highest concentration of total amino acids in the plant shoots and roots was related to the free-Zn and free-amino acid treatment. Regardless of the type of amino acid used, the increase in Zn level up to 10μM increased the leaf activity of the catalase and ascorbate peroxidase.
Zeinab Rafie-rad; Ahmad Golchin; Yahya Tajvar; Javad Fatahi-moghadam
Abstract
Considering the limited water resources in Iran, utilization of modern methods of water conservation and preservation, such as the application of superabsorbent polymers in the soil, is one of the confront approaches of water deficit. For this purpose, in order to investigate the effect of superabsorbent ...
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Considering the limited water resources in Iran, utilization of modern methods of water conservation and preservation, such as the application of superabsorbent polymers in the soil, is one of the confront approaches of water deficit. For this purpose, in order to investigate the effect of superabsorbent on vegetative and reproductive growth of Page Mandarin in drought stress condition, a factorial experiment bases on the completely randomized design with three replications was conducted in 2016 at the Citrus and Subtropical Fruits Research Center of Ramsar. Factors were consisted of three levels of water stress (100, 75 and 50% of field capacity) and superabsorbent (0, 0.25 and 0.5% wt). The results showed that by increasing of water stress, amounts of electrolyte leakage, proline, fruit cracking and titratable acidity were increased. As well as 50% of field capacity level, 0.5% superabsorbent application was caused significantly increase leaf relative water content, total chlorophyll content, leaf water potential 60%, 15%, 23% and 87.5% and decrease electrolyte leakage and total soluble solids 65% and 22% respectively, compared with condition of treatment without applying superabsorbent. So, it seems that superabsorbent can increase the plant tolerance in counteracting moisture stress by maintaining unusable water.
Mahboobeh Fizabadi; Zahra Ghahremani; Taher Barzegar; Ahmad Golchin
Abstract
Today, the production of healthy and high quality seedlings is the main factors of success in growing vegetables such as tomato. Hence, in order to investigate the effect of different levels of vermicompost and nitrogen on the growth parameters of tomato seedlings (Lycopersicon esculentum Mill. cv. Rio ...
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Today, the production of healthy and high quality seedlings is the main factors of success in growing vegetables such as tomato. Hence, in order to investigate the effect of different levels of vermicompost and nitrogen on the growth parameters of tomato seedlings (Lycopersicon esculentum Mill. cv. Rio Grande), a factorial experiment was conducted in a randomized complete design with three replications in 2014 at the research greenhouse of Department of Horticultural Science, University of Zanjan. Treatments consisted of five vermicompost levels (0, 5, 10, 20 and 40 wt %) and nitrogen at five levels (0, 25, 50, 100 and 200 mg N/kg soil). The results showed that nitrogen treatments caused a significant increase in seedling growth. The maximum seedling height, dry weight of root and stem, fresh weight of stem, leaf area and chlorophyll content was observed in 100 mg N/kg Soil. The vermicompost treatments significantly increased seedling growth, so the highest seedling height, internodes length, root and stem length, fresh and dry weight of root and leaf area was obtained in the 10 wt% vermicompost. Also vermicompost caused a significant decrease in growth period of transplant and the minimum period (39.6 days) was recorded in the 10 wt% vermicompost. According to the results the concentration of N. P and K in leaf increased with application of vermicompost. Application of 100 mg N/ kg soil and 10 wt% vermicompost improved seedling growth
Mohsen Seilsepour; Ahmad Golchin; Mahmoud Reza Roozban
Abstract
A greenhouse experiment was carried out to evaluate the effects of salinity stress on growth and macroelements contents of two olive varieties in soilless culture medium. In the research, one-year old saplings of two olive varieties, ‘Zard’ and ‘Mission’, were subjected to different ...
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A greenhouse experiment was carried out to evaluate the effects of salinity stress on growth and macroelements contents of two olive varieties in soilless culture medium. In the research, one-year old saplings of two olive varieties, ‘Zard’ and ‘Mission’, were subjected to different salinity levels induced by NaCl including 0, 4, 8, 12 and 16 dS/m-1 for 5 months. Based on the results, total dry weights of the varieties were decreased at 16 dSm-1 compared to control up to 63 and 85% at ‘Mission’ and ‘Zard’, respectively. Also, a 25% reduction in total dry weight was observed under salinities of 7 and 3.6 dSm-1 for ‘Mission’ and ‘Zard’, respectively. Salinity was decreased the concentrations of macronutrients and increased the concentrations of Na and Cl in roots and leveas of the both varieties. Compared to control, Na and Cl concentrations in leaves and roots was increased under salinity of 16 dS/m-1 at 1660 and 679% for Na and 1069 and 506% for Cl. In all salinity levels, Na and Cl concentrations in the leaves and roots of 'Zard' variety were more than that of 'Mission'. Thesa data demonstrated that ‘Mission’ has a more salinity tolerance than ‘Zard’, and could be used as a salt-tolerant variety for cultivation under salinity conditions. The defence mechanisms of ‘Mission’ are restricting in absorbtion and translocation of Na to aerial parts and accumulate a proper concentration of K in Leaves.
Mohsen Seilsepour; Ahmad Golchin; Mohammad Reza Rouzban
Abstract
A greengouse experiment was conducted to evaluation of salinity stress on growth parameters of two olive cultivars during 2013-2014 at Agricultural and Natural Resources Research Center of Tehran. In the experiment, effects of five levels of irrigation water salinity including 0, 4, 8, 12 and 16 dS.m-1 ...
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A greengouse experiment was conducted to evaluation of salinity stress on growth parameters of two olive cultivars during 2013-2014 at Agricultural and Natural Resources Research Center of Tehran. In the experiment, effects of five levels of irrigation water salinity including 0, 4, 8, 12 and 16 dS.m-1 were evaluated on ʻZardʼ and ʻMissionʼ olive cultivars under soilless culture. Data showed that salinity had significant effects on all growth parameters in both olive cultivars. Leaf dry weight, shoot and root dry weight, leaf chlorophyll index, shoot and root tolerance index, shoot and internodes length, leaf area, leaf number and leaf relative water content were affected by salinity and significantly decreased. These reductions were more in ʻZardʼ comparing to ʻMissionʼ. Shoot dry weight, leaf dry weight and root dry weight were decreased 80, 80 and 69 percent, respectively at 16 dS.m-1 salinity treatments with compare to control. Leaf sodium (Na+) concentration and rate of sodium to potassium (K+) in leaf were increased and leaf potassium concentration was decreased by salinity. Increase of Na+ and decrease of K+ were more in ʻZardʼ comparing to ʻMissionʼ. Also, leaf and shoot dry weight were affected by concentration of Na+, K+ and Na+: K+ in leaf and there were a significant correlation among these parameters with leaf and shoot dry weight. Results indicated that ʻMissionʼ variety were more salt tolerance than ʻZardʼ.