parisa sheikhzadeh; Gholam Behzad; Nasser Zare; Mitra Rostami
Abstract
Objective: Due to the injuries caused by cold and frost in temperate and cold regions, utilizing strategies that increase cold tolerance to enhance the winter survival and establishment of seedlings is imperative.Methods: To investigate the effects of selenium nanoparticles application on photosynthetic ...
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Objective: Due to the injuries caused by cold and frost in temperate and cold regions, utilizing strategies that increase cold tolerance to enhance the winter survival and establishment of seedlings is imperative.Methods: To investigate the effects of selenium nanoparticles application on photosynthetic and biochemical indices and cold tolerance of oilseed rape, an experiment was carried out based on a randomized complete blocks design with three replications at the research farm station of the University of Mohaghegh Ardabili in 2018. The treatments consisted of foliar application of selenium nanoparticles (0 [control], 25, and 50 mg L-1) applied at the 6-8 leaves stage.Results: The results demonstrated that selenium nanoparticle application significantly increased the RWC, photosynthetic pigments, antioxidant enzyme activity, winter survival, and grain yields. The highest RWC, maximal flourescnece (Fm), highest photochemical efficiency of photosystem II (Fv/Fm), and variable fluorescence (Fv), proline content, and the activity of catalase and peroxidase enzymes were obtained with the foliar application of 50 mg L-1 selenium nanoparticles. Selenium nanoparticles application significantly increased the winter survival of oilseed rape plants by about 7.18 to 8.94 percent, by improving the Fv/Fm, the activity of the antioxidant enzymes, and proline content. Foliar application of 25 and 50 mg L-1 selenium nanoparticles resulted in about 28.10 and 34.19 percent increase in grain yield of oilseed rape as compared to the control (no spraying) treatment, respectively.Conclusion: In general, the results demonstrated that applying 50 mg L-1 selenium nanoparticles had positive and significant effects on the photosynthetic and biochemical characteristics of winter oilseed rape, which resulted in the increased cold tolerance of the oilseed rape plants.
Kamal Sadat Asilan
Abstract
In order to investigate the effect of nitrogen, phosphorus, and potassium elements on fatty acid profiles, oil percentage, grain yield, and flax seed oil, Lirina cultivar, a factorial experiment has been conducted during 2019, based on a randomized complete block design with three replications in Hashtgerd ...
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In order to investigate the effect of nitrogen, phosphorus, and potassium elements on fatty acid profiles, oil percentage, grain yield, and flax seed oil, Lirina cultivar, a factorial experiment has been conducted during 2019, based on a randomized complete block design with three replications in Hashtgerd research farm, Alborz Province. It has employed a factorial arrangement in a randomized complete block design with three replications with the factors involving three levels of nitrogen fertilizers (N1=30, N2=60, and N3=90 Kgha-1, three levels of phosphorus fertilizers (P1=40, P2=80, and P3=120 Kg.ha-1), and three levels of potassium fertilizers (K1=40, K2=80, and K3=120 Kg.ha-1). Result show that the highest amount of linolenic acid (43.99%), linoleic acid (17.68%), and palmitic acid (6.02%) have occurred in 30 kg. ha-1 nitrogen and 40 kg.ha-1 phosphorus. The highest amount of oleic acid (27.49%) and stearic acid (5.25%) belong to 30 kg.ha-1 phosphorus. Based on the results, the highest amount of grain yield (2384 kg.ha-1) and oil yield (939 kg.ha-1) are recorded in 90 and 120 kg.ha-1 nitrogen and phosphorus, respectively. Therefore, according to the results, different levels of fertilizer on percentage of oil has had no significant effect.
Raouf Seyed sharif; Reza Seyed Sharifi
Abstract
In order to study the effect of mycorrhiza and foliar nano (Fe and Zn) oxide spraying on yield and some biochemical traits of spring safflower (cultivar Padedeh) under water limitation condition, a factorial experiment was conducted based on randomized complete block design with three replications at ...
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In order to study the effect of mycorrhiza and foliar nano (Fe and Zn) oxide spraying on yield and some biochemical traits of spring safflower (cultivar Padedeh) under water limitation condition, a factorial experiment was conducted based on randomized complete block design with three replications at the research farm of the Islamic Azad University, Ardabil Branch in cropping year of 2014. The experimental factors were included arboscular mycorrhiza application in two levels (with and without mycorrhiza), foliar application of nano zinc oxide in four levels (non-foliar application and foliar application of nano iron oxide, nano zinc oxide and nano zinc oxide + nano iron oxide) and irrigation in three levels [full irrigation as control, irrigation with holding at 50% of flowering and heading-bud stages (moderate and severe water limitation respectively)]. Results showed that water limitation was increased proline content, the activity of catalase, peroxidase, polyphenol oxidase enzymes. Mycorrhiza application and foliar nano (Fe and Zn) oxide spraying improved these traits under water limitation condition and normal irrigation. Means comparison showed that maximum of grain yield (2278.52 kg ha-1) was obtained at application of mycorrhiza, nano oxide of Zn+Fe and full irrigation. Minimum of it (834.25 kg ha-1) was obtained in non-mycorrhiza, no application of nano oxide and irrigation to heading-bud stage. Application of mycorrhiza and nano oxide of Zn+Fe increased grain yield by 35.9% as compared with non-mycorrhiza, non-foliar application of nano oxide under severe water limitation. It seems that mycorrhiza and nano oxide of Zn+Fe application is usable for profitable safflowerproduction under water limitation condition.