Reza Tamartash - Academia.edu (original) (raw)

Papers by Reza Tamartash

پژوهشنامه مدیریت حوزه آبخیز, Apr 1, 2021

Iran is one of the countries in the Middle East that is facing a shortage of renewable water reso... more Iran is one of the countries in the Middle East that is facing a shortage of renewable water resources. As one of the government's socioeconomic policies, the emphasis has been on the optimal use of renewable resources, in particular refined human and industrial wastewater. One of the limiting factors of using these wastewater is the presence of heavy metals in them. Therefore, soil remediation is important to reduce this pollution or to deactivate heavy metals. This study was conducted to investigate the effect of bentonite modification on soil elements concentration irrigated with municipal wastewater under cultivation of Alfalfa and clover in a completely randomized design. In this study, essential and toxic elements of the plant, soil properties and elements in soil under different effluent ratios (0%, 25%, 50%, 75% and 100%) were investigated. Also, due to the presence of heavy metals in wastewater, bentonite modifier was used as immobilizer of heavy metals in soil at two levels of 1% and 3%. The results showed that 100% effluent-3% bentonite treatment had the highest amount of soil organic carbon, organic matter, lime, pH and EC for both alfalfa and clover species (p<0.05). Also, increasing the level of effluent application significantly increased the concentration of essential elements (NPK) in soil and plants. On the other hand, application of 3% bentonite resulted in a significant decrease in the toxicity of lead and cadmium in plants and soils. In general, it can be concluded that application of proper wastewater treatment can be used as a potential source of water to enhance plant growth and yield, as well as the use of bentonite as an immobilizing agent of heavy metals in wastewater in forage production methods.

Journal of Rangeland Science, Aug 11, 2016

Plant diversity and vegetation distribution in an area are related to the soil physical and chemi... more Plant diversity and vegetation distribution in an area are related to the soil physical and chemical properties. The knowledge of relationships between species diversity and soil parameter is essential for sustainable ecosystem management. This study was conducted to investigate the relationships between soil factors and species diversity indices in the protected rangelands of Lashgardar, Malayer, Iran in 2013. The land units in the area were selected in terms of slope, aspect and elevation. Two 100 m length transects were established on the slopes perpendicular to each other with the ten 2 m 2 plots on each transect. The diversity, richness and evenness indices were estimated in each plot based on canopy cover percent. Soil samples were taken from each plot in two depths (0-10 cm and 10-30 cm). Then, soil physico-chemical characteristics were measured in the soil laboratory for moisture, texture, Organic Carbon (OC), Organic Matter (OM), CaCo3, bulk density, pH, and EC. The relationships between species diversity, richness and evenness with soil parameters were estimated using correlations and the multiple regressions using SPSS18 software. Results showed linear relationships between soil factors, species diversity and richness. The relationships in upper layer were stronger than the lower one. Among soil parameters, silt, OC and OM had positive significant effects on species diversity and richness whereas CaCo3, clay and sand had an inverse relationship with plant diversity indices.

EFFECT OF FIRE ON VEGETATION UPON THE SOIL SEED BANK IN BAMO NATIONAL PARK OF SHIRAZ ABBASI MOSEL... more EFFECT OF FIRE ON VEGETATION UPON THE SOIL SEED BANK IN BAMO NATIONAL PARK OF SHIRAZ ABBASI MOSELOU H.*,GHORBANI J.,SAFAIAN NA,TAMARTASH REZA * SARI UNIVERSITY OF AGRICULTURE SCIENCE & NATURAL RESOURCES ...

Journal of Plant Research #R##N#(Iranian Journal of Biology), Aug 23, 2014

Journal of Rangeland Science, Apr 1, 2021

Rangeland is a natural ecosystem including large sources of genetic resources and diverse plant s... more Rangeland is a natural ecosystem including large sources of genetic resources and diverse plant species which always guarantees the rangeland stability against environmental and biological factors. Objective of the present study is to investigate relationship of species diversity and richness to topographic factors. In this regard, the study was conducted in Lashgerdar protected region in Malayer city located in Hamedan province. After determination of work unit with specific characteristics of slope, direction and elevation, the sampling was conducted as random-systematic. Coverage measurement was carried out by establishment of four perpendicular transects with a length of 100 m in each of them. Then, ten 2 m2 plots were established along each transect, and then, diversity, species richness and uniformity were determined in each plot after determination of plant cover. Correlation analysis and multi-variable regression were used in SPSS software to determine relationship of divers...

Journal of Rangeland Science, 2013

Biological invasions form a major threat to the provision of ecosystems productsand services and ... more Biological invasions form a major threat to the provision of ecosystems productsand services and can affect ecosystems across a wide spectrum of bioclimatic conditions.Therefore, it is important to systematically monitor the spread of species over broad regions. Ithas long been recognized that remote sensing and geographical information system couldcontribute to this capacity. This paper aims to investigate the efficiency of Landsat TM imagesin identifying and classifying invasive species Cirsium arvense and Stachys byzanthina inVazroud rangelands of Iran. For optimizing results, the Cos(t) model was used for atmosphericcorrection on the image. Then multiple vegetation indices, by extracting the digital mean ofpixels related to training samples of the corrected image, were calculated. A supervisedalgorithm using minimum distance of mean was used as a classification technique forevaluation against ground truth map. The results indicated that NDVI, Ratio, RVI, TVI andNRVI were the mos...

Journal of Mining and Environment, 2019

Changes in the tailing properties (increasing clay mineral content and fine particles) and poor o... more Changes in the tailing properties (increasing clay mineral content and fine particles) and poor operation of the dewatering systems have negative impacts on the Tailing Storage Facilities (TSF) of the Shahrbabak copper complex. The design solid concentration of the thickened tailings is 63 wt.% in the Shahrbabak paste plant but it is well below the design value right now (approx. 55 wt.%). The aim of this work is to find the effects of the clay mineral and dewatering operations on the water recovery and tailing dam capacity. The understudied samples were taken from the thickener underflow and prepared at the required solid concentrations (55, 60, 65, and 70 wt.%). The results obtained showed that the initial settled density varied from 1.044 to 1.146 t/m3 by increasing the solid concentrations from 55 to 63 wt.%. Furthermore, the shrinkage limit density of the two solid concentrations was recorded at 1.52 and 1.62 t/m3, and the crack volume was estimated at 6.3% and 7.2% of the fina...