Basir Samadi Firozabad; mahdi ghiyasi; Reza Amirnia
Abstract
Objective: After being sprayed, nano-particles easily enter the leaves through the plant's stomatal system due to their small dimensions. Moreover, the significant increase in the molecular surface area of nano materials enhances their reactivity, consequently improving the plant's ability to utilize ...
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Objective: After being sprayed, nano-particles easily enter the leaves through the plant's stomatal system due to their small dimensions. Moreover, the significant increase in the molecular surface area of nano materials enhances their reactivity, consequently improving the plant's ability to utilize these compounds.Methods: The present study was designed as a factorial experiment in a randomized complete block design (RCBD) at the research farm of the Central Station of the Agricultural Research and Education Center of Tehran Province. The study aimed to investigate the effects of foliar application in the form of seven treatments on the quantitative and qualitative performance and yield of the Goldasht safflower cultivar. The seven treatments included no spraying (control), spraying with normal and nano zinc, spraying with normal and nano iron, spraying with normal and nano manganese, and seed priming at three levels of non-priming (control), osmo-priming, and hydro-priming.Results: The results showed that osmo-priming, followed by spraying with nano zinc and then with nano iron, had the most significant effect on increasing all the investigated traits, including yield components, seed yield, and oil percentage in safflower. Additionally, hydro-priming with nano zinc spraying could increase the thousand-seed weight to the highest statistical level.Conclusion: The study suggests that seed priming of safflower with foliar application of micronutrients, especially nano zinc, and iron, can be recommended as a promising method for enhancing the quantitative and qualitative performance and yield of safflower seed and oil in similar weather conditions.
Mahdieh Fallah; Hashem Hadi; Reza Amirnia; Abdollah Hasanzadeh Gorttapeh
Abstract
The present experiment has been conducted as a factorial based on randomized complete block design with three replications in the Agricultural and Natural Resources Research farm of Urmia for two years (2017-2018) to investigate the effect of green manure residues and fertilizer sources on physiological ...
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The present experiment has been conducted as a factorial based on randomized complete block design with three replications in the Agricultural and Natural Resources Research farm of Urmia for two years (2017-2018) to investigate the effect of green manure residues and fertilizer sources on physiological traits, biological yield, and seed oil content of linseed. Experimental factors include green manure in two levels: no green manure and red clover (Trifolium pratense), different sources of fertilizer in four levels: no fertilizer, mycorrhiza, vermicompost and mycorrhiza + vermicompost, both in full irrigation condition and irrigation terminationat the flowering stage. Results of the combined analysis show that the year has a significant effect on chlorophyll a, colonization percentage, grain nitrogen and phosphorus, biological yield, and seed oil. Irrigation termination treatment decreases all traits except proline and soluble carbohydrate contents. Green manure, mycorrhizae, and vermicompost significantly increase the studied traits at both irrigation levels, except for grain nitrogen, not affected by green manure. The application of mycorrhiza+ vermicompost, with or without green manure, is more effective than their individual applications. The dual application results in an increase of 68.98% and 61.34% for biological yield and 11.8% and 4.5% for seed oil, compared to the control in complete irrigation treatment, respectively. In general, green manure, mycorrhiza, and vermicompost can improve the quantitative and qualitative performance of flaxseed in irrigation terminationat the flowering stage.
S. Javad Talebzadeh; Hashem Hadi; Reza Aminia; Mehdi Tajbakhsh; Mohammad Rezaie
Abstract
In order to evaluation the pattern of assimilates distribution to seed under late season drought stress, 11 promising lines of winter wheat along with Orum, Zareh, Mihan, Zarrin and Pishgam cultivars were evaluated in two levels of irrigation (full irrigation and cutting irrigation from flowering to ...
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In order to evaluation the pattern of assimilates distribution to seed under late season drought stress, 11 promising lines of winter wheat along with Orum, Zareh, Mihan, Zarrin and Pishgam cultivars were evaluated in two levels of irrigation (full irrigation and cutting irrigation from flowering to maturity) at the Agricultural Research Station of Miandoab during 2013-2015 growing seasons. Experiments were conducted in split plot based on randomized complete block design with three replications. Results showed that water deficit stress significantly increased remobilization rate, contribution of remobilization and source restriction and decreased the amount of spike weight, peduncle weight, sink restriction by removing leaves other than flag leaf, sink restrictions by removing flag leaf, grain yield and harvest index, so that terminal water deficit stress increased remobilization by 45.45% and the total yield contribution of remobilization of 18.30% in normal conditions increased to 43.33% under stress conditions. Among the genotypes, ‘Zarrin’ and ‘Mihan’ under normal moisture conditions and ‘Mihan’ genotype under terminal drought stress conditions produced the highest grain yield. In this study under terminal drought stress conditions, there were significant positive correlations between grain yield with remobilization rate and contribution of remobilization. It can be concluded that the varieties and genotypes afforded adequate remobilization and contribution of remobilization in grain yield in both conditions are appropriate for cultivation in optimal conditions, as well as areas that are faced with terminal water deficit stress.