Showing 12 results for Imani
M. Rasouli, M. R. Fatahi Moghadam, Z. Zamani, A. Imani, A. Jodakhanloo,
Volume 4, Issue 11 (4-2014)
Abstract
The efficiency of cross-breeding programs mainly depends on the choice of the progenitors and the knowledge on the transmission of traits that breeder wants to improve. In the present study heritability rate of 65 traits related to different parts of vegetative, reproductive, nut and kernel in 12 populations (320 progenies) derived from controlled crosses of 13 local and foreign almond genotypes and cultivars were assessed. Results obtained from parents evaluation showed that ‘Shahrood-12’ was the latest blooming while ‘15/5’ and ‘A’genotypes were the earliest blooming than the other parents. Among the 12 studied populations, in total 46 superior progenies were chosen in terms of heritability of evaluated traits with emphasis on flowering time. Heritability of some important traits such as flowering time, leafing date and bearing habit were obtained as 0.70, 0.80 and 0.75 respectively. Also fitted regression line of these traits was significant at 1% probability level. Close relationship between flowering time and leafing date were obtained in evaluated progenies. Heritability of some nut traits such as weight, length, width, softness and hardness and shell thickness were obtained to be 0.77, 0.60, 0.69, 0.73 and 0.60 respectively and the fitted regression lines to these traits were significant at the 1% probability level. Heritability of traits related to almond kernel such as length, width, weight, shape, double kernel percentage and shriveling were estimated 0.75, 0.79, 0.76, 0.96, 0.55 and 0.54, respectively.
S. S. Mousavi, B. Shiran, A. Imani, S. Houshmand, E. Ebrahimie,
Volume 4, Issue 12 (8-2014)
Abstract
Early flowering and frost in native genotypes are among causes of reduction in almond production in most years. Therefore, a proper understanding of the resistance mechanisms is necessary for developing varieties with high quality and resistant to frost. In this research, four different genotypes were selected out of 40 genotypes based on flowering time and resistance to frost, including late flowering and susceptible to frost (Sh12) medium to late flowering and resistant to frost (H), early flowering and resistant to frost (G19) and medium flowering and susceptible to frost (D99). These genotypes were evaluated in terms of physiological characteristic related to frost resistance at full-bloom stage in a controlled condition. The results showed that the early flowering genotype (G19) and the medium flowering genotype (D99) had the highest and lowest damages, respectively. In the most cases, the amount of soluble sugars and amount of minerals (N, P, and K) were higher significantly in resistant genotypes compared with susceptible genotypes. The correlation between amount of frost damages and soluble sugars and minerals was negative and significant. These results imply that these characters are important in conferring frost tolerance to the genotypes. On the other side, the correlation between frost damage and ion leakage was positive and significant. According to the results shown in Bi-plot diagram, resistance to frost genotypes was accompanied with soluble sugars and minerals. Meanwhile susceptible genotypes were accompanied with ion leaking. In addition, cluster analysis classified different genotypes within different groups. In conclusion, these criteria could be used for detecting resistance genotypes, by the way the genotypes G19 and H both are recommended as frost resistant genotypes.
S. Sharifi, A. Farahnaky, B. Imani, M. Majzoobi,
Volume 5, Issue 18 (2-2016)
Abstract
In this study the effect of different levels of moisture content of maize grits (10, 13, 16 and 19%) as an attribute of physicochemical properties of extruder-derived puffed products, was investigated. The results showed that with increasing maize grits' moisture content, water absorption index (WAI) and water solubility index (WSI) were decreased. Moreover, with changing in feed moisture content from 10 to 16%, the volume and sectional expansion index (SEI) increased but further increase of moisture content to 19% caused a reduction in these parameters. The textural tests also revealed that with increase in moisture content, the compression energy (Nmm), maximum force (N) and time to achieve the first major peak (s) were increased but the number of peaks was decreased. With increase in the moisture content, specific mechanical energy (SME) was decreased, due probably to the reduction in the viscosity of melt. With increase in the moisture content the L and b values were increased but the value of the samples were decreased due to the reduction of Maillard reaction rate. Our data confirms that the moisture content of maize grits may play an important role in the quality of produced extruded snacks and a high quality product can be achieved by optimizing this parameter. In this research, the maximum volume of the extruder product was obtained in 16% of moisture level.
A. Solaimani Pour, A. R. Nikooie, A. Bagheri,
Volume 9, Issue 1 (spring 2005)
Abstract
This study was conducted to determine the problems of marketing channels of damask roses and to seek appropriate solutions to enhance marketing efficiency. The results of the study revealed that traditional and industrial rose production lacked the quality demanded by the market. The efficiency index was % 92.9 in traditional and %55 in industrial production. In addition, with regard to the marketing parameters for each type of production, the share of the factors was calculated. So we can conclude that the reducing units have the most important roles in this process. According to the study, traditional units with %47.2 had a greater share compared with the industrial units (%44.5).
The results have also shown that production retailer wholesalers and middlemen shares were in the lower ranks respectively. Marketing cost coefficient results showed that %70 of the retailer selling price for 1 kg of the product was related to the marketing costs. The costs for industrial units with high and low capacity were %67.7 and %65.4, respectively.
M. J. Soleimani,
Volume 9, Issue 2 (summer 2005)
Abstract
Some of the field crops are severely affected by the Fusarium foot and root-rot in the west of Iran, Hamadan. Pathogenic Fusarium species are potentially severe destructive diseases and could be a major limiting factor for the cereals and potato production in this province. The purpose of this study was to determine the possible effect of soil solarization on the population dynamics of Fusarium spp. The propagules under Hamadan climatic conditions. Pre-tarping irrigation to achieve the field capacity was carried out prior to the various treatments including the black and transparent polyethylene plastic sheets. The experiment was performed in a completely randomized block design with three replicates, in a naturally infested soil. After three, five and eight weeks, soil samples were collected from different soil depths in appropriate plots. The propagule numbers of Fusaria were counted through dilution plate method using selective Nash & Synder and PDA media. The results indicated that the propagules of Fusarium in treated soils (five and eight weeks treatments) were significantly decreased as compared with the three week treated and untreated control plots. Better results obtained with the transparent sheets after eight weeks, followed by treatments with five weeks of mulching. Accordingly, the hydrothermal control of the Fusarium foot and the root-rot disease seem to be effective under the cool and temperate area of Hamadan.
A. Mirsoleimani, H. Amin, M. Najafi Ghiri,
Volume 9, Issue 2 (8-2019)
Abstract
Many factors including climate, type of rootstock, soil properties, geological factors, plant nutrition and irrigation affect the quantity and quality of orange fruit. In this study, the relations between citrus orchards conditions, their soil properties and leaf elements concentration and fruit quality were evaluated. The experiment was conducted as a randomized complete block design and soil, fruit and leaf samples were collected from six different regions of Darab, Fars, Iran. After fruit sampling, land properties such as physiographic features, slope, gravel, altitude and soil physical and chemical properties such as percent of sand, silt, clay, organic matter, calcium carbonate, pH and electrical conductivity and also N, P, K, Fe and Zn availability were determined. Several morphological and qualitative characteristics of fruit including, rind and flesh weight, rind thickness, length, diameter, fruit granulation, flavor, sugar and fruit juice acidity were determined. The contents of N, P, K, Fe and Zn in the collected leaves were determined. Three random samples were taken for each orchard and each replicate consisted of one tree. Results showed that fruit weight was correlated with the land slope, soil pH, electrical conductivity, soil organic matter content, soil N, P and K and leaf K content. Rind thickness showed a significant positive correlation with parameters such as land slope, electrical conductivity, organic matter, silt, clay and soil N, P and Zn and leaf N and K content. However, there was a significant negative correlation between rind thickness and soil gravel and sand contents. The relations between fruit granulation and soils calcium carbonate, gravel, organic matter content and soil K concentration were significant. TSS to TA ratio in fruit juices had significant negative correlation with land altitude, soils silt, calcium carbonate contents and leaf K content. Generally, many soil properties had significant effects on fruit quality but it seems that soil texture, organic matter, pH, P and K were more effective on fruit quality.
H. Narimani, R. Seyed Sharifi, N. Ebadi,
Volume 10, Issue 1 (4-2020)
Abstract
In order to study the effects of supplementary irrigation and nano iron oxide on the grain yield, and some physiological and biochemical traits of wheat (Triticum aestivum L.) under rain fed conditions, a factorial experiment was conducted based on a randomized complete block design with three replications in Agricultural Research Station of Ardabil, Northwest of Iran, in 2016. Factors included irrigation levels (no irrigation as the rainfed, supplementary irrigation at heading and booting stages), nano iron oxide application at four levels (without nano iron oxide as the control, application of 0.3, 0.6 and 0.9 g L-1). Application of 0.9 g L-1 nano iron oxide under rainfed condition increased soluble sugars and proline content and antioxidant enzymes activity (catalase, peroxidase and polyphenol oxidase) by 129.89, 168.76, 27.64, 94.2, and 31.71%, respectively, in comparison with no application of nano iron oxide and supplementary irrigation at the booting stage. Also, there were 75.89 and 38.43 increases, respectively, in the leaf protein and grain yield with the application of 0.9 g L-1 nano iron oxide and the supplementary irrigation at the booting stage, in comparison with no application of nano iron oxide under rainfed conditions. It seems that the application of nano iron oxide and supplementary irrigation can increase the grain yield of wheat under rainfed conditions due to improving the physiological and biochemical traits.
M. Soleimani, M. Shahedi,
Volume 10, Issue 2 (summer 2006)
Abstract
Isotherm curves are useful for the designing of dryer as well as controling of the seed moisture content during storage and drying process. To study the curves, this research was performed on the basis of two factorial experiments including three factors: (1) hybrid at two levels (Three Way Cross 647 and Single Cross 704) (2) temperature at 6 levels (from 5 to 55°C) and (3) Relative Humidity (RH) at 5 levels (from 10 to 90 percent) for the analysis of the adsorption and desorption phenomena. For maintaining RH at the above mentioned ranges, glycerol solutions with different concentrations were used. The results showed that the relationship between solutions concentration and their RH was non-linear and somewhat related to temperature. Also, statistical analysis displayed that for 3 factors of tepmerature , RH and hybrid, the effects on Equilibrium Moisture Content (EMC) in both adsorption and desorption phenomena were significant at α=1%. Comparisons of means showed that hybrid 704 had higher EMC values than did hybrid 647 under the same conditions, in other words, hybrid 704 produced lower aw than did hybrid 647 at the same moisture content. Fitting experimental values on non-linear models (Henderson, Chung-Pfost and Oswin) showed Oswin as the best model for adsorption and desorption curves for hybrid 704 and also for adsorption curve for hybrid 647 , but the best model for desorption curve for hybrid 647 was Chung-Pfost.
R. Seyed Sharifi, N. Ebadi, H. Narimani,
Volume 10, Issue 2 (7-2020)
Abstract
In order to study the effects of supplementary irrigation and biofertilizers on grain yield, dry matter remobilization and some physiological traits of barley (Hordeum vulgare L.) under rainfed condition, a factorial experiment was conducted based on randomized complete block design with three replications at in 2017. Factors included irrigation at three levels (no irrigation as rainfed (I1), supplementary irrigation at 50% heading (I2) and booting stages(I3) and biofertilizers application at four levels (without biofertilizers as control (Q1) , application of mycorrhiza(Q2), Azetobacter(Q3), both application of mycorrhiza and Azetobacter(Q4). The results showed that supplementary irrigation at heading stage with both application of mycorrhiza and Azetobacter increased efficiency of PSII photochemistry (Fv/Fm(, chlorophyll index and relative water content of flag leaf compared to non-application of biofertilizers under rainfed condition. Rainfed condition and no application of biofertilizers increased electrical conductivity and contribution of dry matter remobolization in grain yield. The highest and the lowest grain yields (268.2 and 206.5 g m-2 respectively) were obtained at supplementary irrigation at heading stage with both application of mycorrhiza and Azetobacter, and no application of biofertilizers under rainfed condition. In conclusion, it seems that application of biofertilizers and supplementary irrigation can increase grain yield of barley under rainfed condition due to improving some physiological traits.
K. Solaimani, R. Tamartash, F. Alavi, S. Lotfi,
Volume 11, Issue 40 (summer 2007)
Abstract
In order to manage the rangeland resources, remote sensing data is able to provide a sensible role of different cases in flora community such as biomass. The study area in SefidAb subbasin of the Lar Dam basin is located in central Alborz, where the climatic condition is semihumid and near to moderate. For the assessment of the sattelite data and their capability in estimation of the range production, Landsat-TM data with different bands was used. In this research, the field data was collected using random-systematic method in 20 sampling units of 200 plots. For geographic coordinates of the sampling units and related pixels in digital data, GPS and also existing benchmark data of the nearest points were used. Then correlation between ground data and vegetation index from different band combination was investigated and the reasonble vegetation indices were obtained. Finally, the best models were extracted for this purpose, which showed sensible relation between the field data and vegetation index. Therefor, it is possible to estimate range production using Landsat TM data related to ground control.
H. Narimani, R. Seyed Sharifi, M. Sedghi,
Volume 13, Issue 3 (11-2023)
Abstract
In order to evaluate the effect of putrescine, vermicompost and mycorrhiza on yield, activity of antioxidant enzymes and some physiological traits of triticale in different irrigation regimes, an experiment was conducted as factorial based on randomized complete block design with three replications at the Research Farm of University of Mohaghegh Ardabil, northwest of Iran in 2020. The experimental factors included irrigation in three levels (full irrigation as control; irrigation withholding at 50% of heading, and irrigation withholding at booting stage), application of bio-organic fertilizers in four levels (no application as control, application of vermicompost, mycorrhiza, and simultaneous application of vermicompost and mycorrhiza), foliar application of putrescine in three levels (foliar application with water as control, foliar application of 0.4 and 0.8 mM). The results showed that the irrigation withholding in booting stage with application of mycorrhiza, vermicompost and foliar application of 0.8 mM putrescine increased activity of catalase, peroxidase and polyphenol oxidase enzymes compared with no application of bio-organic fertilizers and putrescine at the same irrigation level. Evaluation of some physiological traits showed that at 242 days after planting, the simultaneous application of vermicompost and mycorrhiza and foliar application of 0.8 mM putrescine under irrigation withholding in booting stage conditions increased the relative water content (39.1%), chlorophyll a content (49.3%), chlorophyll index (37.2%), stomatal conductance (32.1%), variable fluorescence (84.9%), maximum fluorescence (45.1%), and quantum efficiency of photosystem II (27.6%) in comparison with no application of biofertilizers and putrescine at the same irrigation level. Moreover, application of vermicompost and mycorrhiza and foliar application of 0.8 mM putrescine at full irrigation conditions decreased hydrogen peroxide (29.2%), while increased grain yield (39.6%) in comparison with no application of biofertilizers and putrescine under irrigation withholding in booting stage. It seems that the simultaneous application of mycorrhiza and vermicompost and foliar application of putrescine can increase the grain yield of triticale under water limitation conditions due to improvement of antioxidant enzymes activity and some physiological traits.
S.m Ziaee, M Kafi, J Shabahang, H Khazaee, M Soleimani,
Volume 13, Issue 47 (fall 2009)
Abstract
Production of halophytes using saline waters and soils, and feeding livestock with them, is one of the most sustainable ways of desert ecosystems conservation and food production for people living in these areas. A field experiment was conducted at Salinity Research Station, Ferdowsi University of Mashhad, in 2007 to evaluate the effect of planting density and harvesting time on oil and protein yield of Kochia. Treatments were arranged as a split-plot based on a randomized complete block design with three replications. Planting density (10, 20, 30 and 40 plants m-2) as assigned to main plots and two dates of harvesting (after 50% flowering and full maturity) constituted the sub-plots. Plant density had a significant effect on grain yield, mean seed weight, harvest index, oil yield, oil content and protein yield at maturity stage. Forage and protein yield were also affected by plant density at the harvest date of 50% flowering. Total dry matter, protein yield and percentage differed significantly between the two harvest dates. The greatest grain yield (2590 kg ha-1) and oil yield (357.7 kg ha-1) were achieved from 20 plants m-2, whereas those from 10 plants m-2 were minimal. Maximum protein yield (3390 Kg ha-1) was obtained from the planting density of 30 plants m-2 at 50% flowering stage. Based on the results of this study, the best qualitative yields for Kochia could be obtained from a planting density of 30 plants m-2 after 50% flowering but one may recommend planting Kochia at 20 plants m-2 for a high grain or oil production.
