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Showing 6 results for Azizi

E. Samieiani, H. Ansari, M. Azizi, S. M. Hashemi-Nia, Y. Salahvarzi,
Volume 4, Issue 3 (Journal of Science and Technology of Greenhouse Culture 2013)
Abstract

Nowadays, stress management is considered to be very important in landscapes. The present research was conducted to investigate the effects of regulated deficit irrigation at 4 levels (25, 50, 75 and 100% of lawn irrigation requirement) on some biochemical indices of four groundcover plants (Lolium perenne, Potentilla spp, Trifolium repens and Frankinia spp) to be used in landscapes, with 3 replications. Results showed that Frankinia spp had the highest proline content (0.84 mg/g fresh weight) and the lowest chlorophyll content (15.9 mg/g fresh weight), the 75% stress treatment had the highest proline content (0.84 mg/g fresh weight) and control treatment had the highest chlorophyll content (32.6 mg/g fresh weight). For total carbohydrates, the highest and the lowest amounts (1.54 and 0.79 mg/g fresh weight) belong to Lolium perenne and Trifolium repens, respectively. Also, among the species, Trifolium repens showed the highest antioxidant activity (75.05%). In general, regulated deficit irrigation affected different biochemical characteristics of the examined groundcover plants significantly. But, applying it up to the damaging point for landscape plants can be an important management strategy for reduction of water consumption in green spaces.
Gh. Zarei, A. Azizi,
Volume 6, Issue 4 (Journal of Science and Technology of Greenhouse Culture 2016)
Abstract

In greenhouse culture, in addition to increasing the quantity and quality of crop production in comparison with traditional methods, the agricultural inputs are saved, too. Recently, using new methods, designs and materials, and higher automation in greenhouses, better management has become possible for enhancing yield and improving the quality of greenhouse crops. The constructed and evaluated central controller unit (CCU) is a central controller system and computerized monitoring unit for greenhouse application. Several sensors, one CCU, several operators, and a data-collection and recorder unit were the major components of this system. The operators included heating, cooling, spraying, ventilation and lighting systems, and the sensors are for temperature, humidity, carbon dioxide, oxygen and light in inside and outside the greenhouse. Environmental conditions were measured by the accurate sensors and transmitted to the CCU. Based on this information, the CCU changed variables to optimize the greenhouse environmental conditions to predetermined ranges. This system was totally made of local instruments and parts and had the ability to integrate with the needs of the client. The designed and implemented CCU was tested in a greenhouse located in Agriculture and Natural Resources Research Center of Khuzestan Province during summer season of 2011. The CCU was operated successfully for controlling greenhouse temperature in the range of 22-29 ˚C, relative humidity of 35-55%, artificial lighting in the case of receiving radiation of less than 800 Lux and turning on the ventilation units if the concentration of carbon dioxide was more than 800 mg/L.


A. Shahbodaghlo Shahbodaghlo, A. Azizi Azizi, H. Sarikhani Sarikhani, M. Rajabi Rajabi,
Volume 7, Issue 4 (Journal of Science and Technology of Greenhouse Culture 2017)
Abstract

Artichoke (Cynara scolymus) is peculiar among the vegetables due to its medicinal properties. Previous studies have been shown that Ultraviolet (UV) radiation stimulates the production of some secondary metabolites in the plants. In the present study, the effects of UV-A (360 nm) radiation on total phenolic content, total flavonoid content, antioxidant capacity, cynarin content and some morphophysiological properties of Artichoke leaves were investigated. The greenhouse experiment was carried out on one cultivated type from Isfahan and two varieties from USA (Green Globe) and Italy (White Giant), with four treatments of UV-A radiation (0, 1, 2 and 4 hours per day). Radiation treatments were applied once every 2 hours during the 16 hours of daylight. Results showed that exposure to UV-A increased the fresh and dry weight of plants. Chlorophyll a, b and total chlorophyll contents decreased under the UV-A radiation. Maximum and minimum contents of chlorophyll a were observed in White Giant cultivar (control treatment) and 4 hours per day treatment, respectively. UV-A radiation had a significant effect on total phenolic content, total flavonoids content and antioxidant capacity of the three cultivars of Artichoke. The highest and the lowest total phenolic content were observed in White Giant cultivar (4 hours per day treatment) and control, respectively. The highest and the lowest amounts of antioxidant capacity were recorded for Green Globe variety and Isfahan cultivar, respectively. However, the results showed that the leaf cynarin content was decreased by increasing the UV-A radiation. Due to the increase in total phenolics and flavonoids in the mentioned conditions, the amount of other phenolic compounds may have increased in the leaves.


B Tajeddin, A Azizi, G Hosseini,
Volume 11, Issue 2 (Journal of Science and Technology of Greenhouse Culture 2020)
Abstract

Factors such as suitable substrate and packaging may increase the shelf life of greenhouse bell pepper. In this study, the greenhouse bell pepper plants grown in the substrates containing 0, 25, 50, 75 and 100% compost tea in hydroponic culture were packaged in two types of film using the modified atmosphere method. Firmness of fruit texture, total soluble solids, pH, titratable acidity, vitamin C, and respiration were measured immediately after harvesting and during storage time with three replications. Then, the data obtained from the above tests were analyzed in a completely randomized design with factorial arrangement (three factors: substrates containing different amounts of compost tea, type of packing material, and storage time). Although the results showed that characteristics of the bell peppers grown on the substrates containing different amounts of compost tea were significantly different (p<0.05) from the substrate without compost, no significant result was obtained as to which percentage of compost tea had the most impact. With regard to storage time, most of the tested characteristics had a decreasing trend, but still laid within the standard ranges. In terms of the type of film, with a slight difference, nanofilm was superior to polyethylene film. As a conclusion, the bell peppers grown on the substrates containing compost tea and packaged in the nanofilms with the modified atmosphere method had acceptable shelf lifes more than one month.

R. Norouzi Esfahani, Sh. Khaghani, M. Gomarian, A. Azizi, F. Mortazaeinezhad,
Volume 14, Issue 2 (Journal of Soil and Plant Interactions 2023)
Abstract

Abstract
The use of organic fertilizers is one of the appropriate ways to produce medicinal plants due to their proper impact on the various soil properties, maintaining environmental health and better plant growth. This study was conducted to investigate the impact of various vermicompost levels on the growth and the morphological and physiological properties of the medicinal-ornamental plant of the Mullein, under drought stress conditions. The research was carried out in the form of split plots in a complete blocks design with four replicates. Experimental treatments included the use of vermicompost organic fertilizer at three levels of zero, 4, and 8 kg/m2 (equivalent to zero, 4, and 8 tons per hectare) and drought stress at two levels of normal irrigation (no stress) and irrigation at 50% of soil field capacity (FC). The results showed that the use of vermicompost and drought stress improved the morphological and physiological traits of the medicinal plant of Mullein. The highest height of the stem, the stem flower, the number of leaves, the height of the flower, the dry weight of shoot, and the root length were obtained by the use of vermicompost at 4 and 8 kg/m2 levels. The use of vermicompost at the rate of 8 kg/m2 increased chlorophyll and anthocyanin, respectively, by 53.7 and 122% compared to control. It was observed that by applying vermicompost at the levels of 4 and 8 kg/m2, significant changes in the morphological and physiological traits of the Mullein plant occurred. On the other hand, the combination of vermicompost application and mild drought stress also caused positive changes in the plant traits. Therefore, mild drought stress, and also for improving the vegetative growth and reproductive efficiency of the medicinal-ornamental plant of the Mullein, the use of vermicompost at 4 kg/m2 (equivalent to 4 tons per hectare) are recommended.

Background and Objective: Due to the lack of water resources, it is important to introduce and use native plant species with valuable medicinal properties such as the Mullein (1). The use of organic fertilizers is one of the appropriate ways to produce medicinal plants due to its proper impact on the various soil properties, maintaining environmental health and better plant growth (2). Drought is one of the environmental stresses that affect the plant growth, structure and activities, and plant response to environmental stresses varies in morphological, cellular, and molecular levels. This study was conducted to investigate the impact of various vermicompost levels on the growth and the morphological and physiological properties of the medicinal-ornamental plant of the Mullein, under drought stress conditions.

Methods: The research was carried out in a research farm in the form of split plots in a complete blocks design with four replicates. Experimental treatments included the application of vermicompost organic fertilizer at three levels of zero, 4, and 8 kg/m2 (equivalent to zero, 4, and 8 tons per hectare) and drought stress at two levels of normal irrigation (no stress) and irrigation at 50% soil field capacity (FC). Then, the morphological and physiological properties of the Mullein were determined and analyzed.

Results: The results showed that the use of vermicompost fertilizer and drought stress improved the morphological and physiological traits of the medicinal plant. The highest height of the stem, the stem flower, the number of leaves, the height of the flower, the dry weight of shoot, and the root length were obtained by the use of vermicompost at 4 and 8 kg/m2 levels. The use of vermicompost at the rate of 8 kg/m2 increased chlorophyll and anthocyanin, respectively, by 53.7 and 122% compared to the control. The production of most secondary metabolites and plant growth increased significantly in the drought stress condition presumably due to osmotic regulation. It was observed that by applying vermicompost at the levels of 4 and 8 kg/m2, significant changes in the morphological and physiological traits of the Mullein plant occurred. The contents of chlorophyll and anthocyanin pigments increased by 1.67 and 0.25 mg/g, respectively, with the application of vermicompost fertilizer at the rate of 8 kg/m2 compared to the control.
Therefore, mild drought stress, and also for improving the vegetative growth and reproductive efficiency of the medicinal-ornamental plant of the Mullein, the use of vermicompost at 4 kg/m2 (equivalent to 4 tons per hectare) are recommended.

Conclusions: Due to improving soil physical and chemical properties and the nutritional conditions, vermicompost was able to increase the plant growth. The combination of vermicompost application and mild drought stress also caused positive changes in the plant traits. Therefore, mild drought stress, and also for improving the vegetative growth and reproductive efficiency of the medicinal-ornamental plant of the Mullein, the use of vermicompost at 4 kg/m2 (equivalent to 4 tons per hectare) are recommended. These results suggest that the planting of Mullein (Verbascum thapsus) provides an opportunity for significant reductions in the water use in urban landscapes.

References:
1. Dong, X., Mkala, E., Mutinda, E., Yang, J., Wanga, V., Oulo, M., Onjolo, V., Hu, G., Wang, Q., 2022. Taxonomy, comparative genomics of Verbascum Scrophulariaceae, with implications for the evolution of lamiales. BMC Genomics 23: 122.
2. Xiaolu, W., 2016. Drought stress and re-watering increase secondary metabolites and enzyme activity in Dendrobium moniliformePlant-Microbe-Animal Interactions 94: 385393.
 
Y. Azizi Kia, M. Moradi, Z. Darvishpasand, H. Taleshi,
Volume 15, Issue 3 (Journal of Soil and Plant Interactions 2024)
Abstract

Abstract
Myrtus communis is one the most important Mediterranean species in Zagros forest. Although, M. communis widely spreads in Zagros forest, little information is available about its distribution in south western parts of Iran. Due to the lack of information on its distribution in southern Zagros, in the present study soil physical and chemical properties of M. communis stands in Fars, Khuzestan, and Kohgiluyeh and Boyer Ahmad provinces were determined to generate basic information about soil properties in its stands in south western provinces of Iran. In each site, five 25 × 25 meter plots were selected and soil samples were taken from the 020 cm layer. Soil analysis included total nitrogen, available phosphorous, available potassium, organic carbon, pH, texture and bulk density. Our results indicated that the highest values for soil nitrogen and organic carbon contents belonged to the M. communis stand in Nourabad Mamasani and were significantly higher compared to the other sites. While the lowest values of soil nitrogen and organic carbon recorded for Andika, were significantly lower compared to the other sites. M. communis stands in Nourabad Mamasani had the highest soil fertility, compared to the other sites. Besides, M. communis spreads in neutral or slightly alkaline soils. Soil textures in the studied sites were loam, sandy loam and silt loam classes. Independent sample t-test showed that M. communis stands had higher soil nitrogen, organic carbon, phosphorus, and potassium compared to the vicinity stands. Overall, M. communis prefers coarse and loamy soils with neutral pH or slightly alkaline and high nutrients.

Background and Objective: Knowledge about forest tree species and their site demands is a fundamental topic in silviculture and forest soil productivity (Kammesheidt, 2000; Zolfaghari et al., 2017; Ebrahimi Askari et al., 2019), which can have positive effects on plantation and successful management (Moradi et al., 2017). Myrtus communis is one the most important Mediterranean species in Zagros forest. Although, M. communis widely distributes in Zagros forest, little information is available about its distribution in south western of Iran. Therefore, in the present study soil physical and chemical properties of M. communis stands in Fars, Khuzestan, and Kohgiluyeh and Boyer Ahmad provinces were determined to generate basic information about soil properties in its stands in south western provinces of Iran.

Methods: To study soil physical and chemical properties, M. communis stands in Nourabad Mamasani (Fars province), Lendeh (Kohkiloye and Boyer Ahmad province), Dezful and Andika (Khuzesran province) were selected. In each site, five 25 × 25 meter plots were selected and soil samples were taken from the 020 cm layer. Soil samples were taken from the four corners and center of each plot and pooled together, finally one pooled soil sample for each plot was transferred to the lab (Moradi et al., 2022). To compare M. communis stands with the vicinity stands, soil samples were collected from the vicinity stands by the same procedure. Soil analysis included total nitrogen, available phosphorous, available potassium, calcium carbonate equivalent, organic carbon, pH, texture and bulk density. To evaluate the differences between M. communis sites, one-way ANOVA was used. Besides, independent sample t-test was performed between soil variables in M. communis stands and soil variables of the vicinity sites. Finally, principal component analysis (PCA) was used to determine the most important soil factors in M. communis distribution.

Results: Our results indicated that the highest values for soil nitrogen and organic carbon belonged to the M. communis stand in Nourabad Mamasani. While the lowest values of soil nitrogen and organic carbon recorded for Andika, were significantly lower compared to the other sites. M. communis stands in Nourabad Mamasani had the highest soil fertility, compared to the other sites, perhaps due to the higher tree density of M. communis in the Nourabad Mamasani site. Dezful site had the highest soil bulk density and the lowest soil porosity compared to the other sites. Besides, M. communis spreads in neutral or slightly alkaline soils. Studied soil textures were loam, sandy loam, and silt loam. First axis represents the soil physical properties in M. communis distribution. Soil organic carbon, nitrogen, phosphorus, potassium, and tree density significantly correlated with the second axis. The results of independent sample t-test for M. communis stands and their vicinity sites showed that M. communis stands had significant higher soil nutrients, but soil EC, pH and calcium carbonate equivalent were not significantly different between M. communis stands and their vicinity sites.

Conclusions: Based on the results, M. communis prefers sandy and loam soils with neutral or slightly alkaline pH. Therefore, the most important factors in M. communis distribution are coarse-textured soils and high soil nutrients. This means in locations with such a condition, the plantation of the M. communis is recommendable. Moreover, M. communis stands provide more fertile soil compared to the Brant's oak stands, agricultural lands, and wasteland.

References:
1. Kammesheidt, L., 2000. Some autecological characteristics of early to late successional tree species in Venezuela. Acta Oecol. 21(1), 37–48. https://doi.org/10.1016/S1146-609X(00)00108-9.
2. Ebrahimi Askari, A., Moradi, M., Basiri, R., Mirzaei, J., Ghasemi, A., 2019. Evaluation of soil physiochemical properties and regeneration of Prosopis cineraria (L.) Druce stands in southern Iran. Iran. J. For. 11(2), 255–267. (In Persian with English abstract)
3. Zolfaghari, Z., Moradi, M., Basiri, R., Ghasemi, A., 2017. Evaluation of soil physicochemical properties of Tecomella undulata in Busher province. For. Wood Pro. 70(2), 273–280. https://doi.org/10.22059/JFWP.2017.62484. (In Persian with English abstract)
4. Moradi, M., Jorfi, M.R., Basiri, R., Yusef Naanaei, S., Heydari, M., 2022. Beneficial effects of livestock exclusion on tree regeneration, understory plant diversity, and soil properties in semiarid forests in Iran. Land Degrad. Develop. 33(2), 324–332. https://doi.org/10.1002/ldr.4154.
5. Moradi, M., Imani, F., Naji, H.R., Moradi Behbahani, S., Ahmadi, M.T., 2017. Variation in soil carbon stock and nutrient content in sand dunes after afforestation by Prosopis juliflora in the Khuzestan province (Iran). iForest 10, 585–589. https://doi.org/10.3832/ifor2137-010
 

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