Reza Tamartash; Fatemeh Montazeri; Mohamadreza Tatian; Ghorban Vahab Zadeh
Volume 15, Issue 4 , January 2018, , Pages 1-14
Abstract
Introduction: Soil pollution by heavy metals in the soil due to long-term sustainability and ecologically harmful effects, has become an environmental problem. In the study of vegetation in polluted areas with heavy metals, plants have the ability to grow and absorption the heavy metals, viewpoint the ...
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Introduction: Soil pollution by heavy metals in the soil due to long-term sustainability and ecologically harmful effects, has become an environmental problem. In the study of vegetation in polluted areas with heavy metals, plants have the ability to grow and absorption the heavy metals, viewpoint the scientific aspects, functional and economically very important. Material and methods: In this study 500, 1250 and 2000 meter from the center Kiasar cement of sari in Mazandaran province, soil and vegetation sampling was conducted using systematic random. Plant species such as Astragalus, Artemisia and Convolvulus with 3 replications and 3 treatments (a total of 27 samples and 27 samples of soil from the plant Rhizosphere) in the form of randomized complete block design was tested. The collected Samples transported to the laboratory for testing. The concentration of Pb, Cu, and Zn of the samples were determined by using ICP Device. Results and discussion: Results of statistical analysis of this study showed that heavy metals in soil had difference was greater than the species studied. So compare means of data show amount of cu and pb in soil and species had significant differences with increasing distance (p < 0.05). Copper increased with increasing distance and lead showed decreasing trend. Zn did not show any significant differences with the changes of distance in soil but it was significant differences in species and does not follow the regular process. Conclusion: Correlation of heavy elements of species with soil elements showed that Astragalus and Artemisia have significant Correlation with Copper and lead but Convolvulus just significant positive correlation with the Zn.
Samira Hossein Jafari,; Mohammad Reza Tatian; Reza Tamartash; Ali Akbar Karimian
Volume 11, Issue 4 , January 2014
Abstract
To assess the impact of grazing on the diversity, richness and evenness of vegetation, several indices and information on plant composition are necessary because of their different sensitivity to grazing gradients and kinds of herbivores.Thus, the purpose of this study was to compare these indices between ...
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To assess the impact of grazing on the diversity, richness and evenness of vegetation, several indices and information on plant composition are necessary because of their different sensitivity to grazing gradients and kinds of herbivores.Thus, the purpose of this study was to compare these indices between two wildlife and livestock grazing sites in steppe rangelands of Mehriz. Sampling was performed using a random systematic method in April 2012 (10 transects of 100m and three plots of 2m2 were placed on each transect on each site). The species name, plant families, longevity and canopy cover percentage were determined in each plot and along each transect. Finally, the data were analysed using an independent sample t-test. The results showed that the canopy cover percentage of Colchicum kotschyi, Iris songarica(p<0.05) and Stachys inflata(p<0.01) significantly increased while the percentage of Artemisia sieberi, Stipa barbata(p<0.01) and Scorzonera sp.(p<0.05) canopy cover was revealed to have significantly decreased in deer grazing areas. The results of a statistical analysis showed that deer grazing has caused plant diversity indices to increase such as Shannon, Simpson and evenness (p<0.01). However, the Margalef and Menhinick indices did not show any significant difference between the two sites.
Ghodratollah Heydari; Reza Tamartash; Mohammadreza Tatian; Mohsen Baghestanifar
Volume 10, Issue 1 , October 2012
Abstract
The intensive grazing of livestock of is one of the physical destroyer pressures on the rangeland ecosystems that cause reduction of vegetation and species variations. The basis for this study was to investigate the grazing effect of livestock on the plant characteristics in the grazed and non-grazed ...
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The intensive grazing of livestock of is one of the physical destroyer pressures on the rangeland ecosystems that cause reduction of vegetation and species variations. The basis for this study was to investigate the grazing effect of livestock on the plant characteristics in the grazed and non-grazed area. The Mountain rangelands of Gorgan, which have been moderately and heavily grazed areas, were selected. The systematic sampling was done randomly on four plots with three transects in each area. Simpson, Shannon, Menhinick and Margalef indices in PAST Software, recorded the species characteristics as diversity and richness in each plot. The data method used to analyzed there data was analysis of variance and means comparison in MINITAB Software. The results showed that the vegetation indices in heavily grazed area were less than the non-grazed area. The species diversity did not show significant difference in the moderately grazed areas comparable to other regions.
