Azin Sharafi; Seyed Akbar Javadi; Ehsan Zandi Esfahan; Mohammad Jafari; Mahshid Souri
Volume 31, Issue 3 , September 2024, , Pages 266-283
Abstract
AbstractBackground and objectivesHalophyte plants grow and produce in very saline water and soil conditions; however, they do not compete with agricultural products for quality soil and water as the main sources of production. Halophytes can tolerate high salinity for various reasons such as morphological ...
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AbstractBackground and objectivesHalophyte plants grow and produce in very saline water and soil conditions; however, they do not compete with agricultural products for quality soil and water as the main sources of production. Halophytes can tolerate high salinity for various reasons such as morphological characteristics, vegetative form, physiology and mechanisms of salinity tolerance. Although there have been good studies on the growth and salinity tolerance of halophyte species, there is little information about the absorption of heavy elements and the phytoremediation ability of different halophyte species. Heavy metal pollution is a serious problem in the lands adjacent to mines, which can be remedied by methods such as phytoremediation, while more studies are needed in this field. The present study aimed to evaluate the potential of several species of saltwort in the phytoremediation of mineral-contaminated soils. MethodologyFor this purpose, the ability of five halophyte species, Haloxylon persicum, Tamarix ramossisima, and Halocnemum strobilaceum, in phytoremediation of heavy metals arsenic (As), copper (Cu), lead (Pb), and nickel (Ni) was investigated at the Miduk mining site. Miduk copper mine is located 42 km northeast of Babak city in Kerman Province.The vegetation of this area includes short bushes and scattered forest trees such as Buxus hyrcana, Prunus antarctica, Pistacia atlantica, Calligonum comosum, Tamarix spp., and Astragalus spp. and bush plants such as Artemisia sieberi, Salsola richteri, Rheum ribes, Cirsium vulgare, Ferula communis and Ziziphora clinopodioides. Sampling was done from the five halophyte species at distances of 1000, 1500, 2000, and 5000 m from the Miduk copper mine, which included 4 repetitions and each repetition included 20 bases. The total number of plant and soil samples was 400 and 120, respectively. Sampling was done by harvesting the plant and then separating the shoot (aerial organs) and root (underground organ) at the flowering stage. As, Cu, Ni, and Pb elements were measured using the inductively coupled plasma ICP-OES device. ResultsThe results showed significant differences between H. strobilaceum, H. persicum, and T. ramossisima species regarding the amounts of arsenic, copper, and lead in different components of plants and soil. Ha. persicum has the highest amounts of arsenic and copper in the shoot, roots, and soil. At a distance of 1000 m, the highest concentration of arsenic is observed in the shoot, roots, and soil, as well as copper values in the shoot and soil. At a distance of 5000 m, a lower concentration of copper in the soil and a higher concentration of arsenic can be seen in the soil. In the case of Ta. ramossisima species, the highest concentration of arsenic is observed in the root and the highest amount of lead is also observed in the shoot. The results confirmed the phytoremediation potential of all five halophyte species for the remediation of contaminated soils at a distance of 1000 m from the copper mine, while the species H. strobilaceum had a higher potential for phytoremediation of contaminated soils. Furthermore, environmental pollution was not observed in the area without pollution to moderate pollution; which probably indicated the lack of transfer of heavy metals to agricultural products in lands further away from the mine. ConclusionSignificant differences in the distribution and concentration of elements have been observed between these species and at different distances, and these results can contribute to a better understanding of the environmental effects on the concentration and distribution of elements in plants. The results of this research showed the phytoremediation potential of plant species H. persicum, H. salicornica, S. rosmarinus, T. ramossisima, and H. strobilaceum, which indicated the acceptable ability of saline species to improve mineral-contaminated soils. The phytoremediation potential of H. strobilaceum species was higher than other species. Also, based on the indicators of the accumulation of elements and the low amount of contamination of the examined species in the points with a greater distance from the mine (more than 1500 m), it showed that agriculture in the area around the mine is observed with caution and periodic examination of the area in terms of concentration heavy metals are possible.
dariush Ghorbanian; Ehsan Zandi Esfahan; mohammad Amirjan; abolfazl nejatian
Volume 29, Issue 3 , October 2022, , Pages 171-180
Mahshid Souri; Ehsan Zandi Esfahan; Nadia Kamali
Volume 25, Issue 3 , November 2018, , Pages 524-535
Abstract
Investigating the effect of environmental factors on the yield of forage plants is one of the necessities for improvement, rehabilitation, and development of rangelands. Festuca ovina is of perennial grasses. This species is found to be abundant in the semi-steppe rangelands of the country due to its ...
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Investigating the effect of environmental factors on the yield of forage plants is one of the necessities for improvement, rehabilitation, and development of rangelands. Festuca ovina is of perennial grasses. This species is found to be abundant in the semi-steppe rangelands of the country due to its adaptability to dehydration and low temperatures of -20 ° C. This rangeland species plays an important role in providing forage, soil stabilization, erosion prevention, and soil conservation in semi steppe rangelands. Therefore, the purpose of this study was to investigate the effect of salinity and pollutant factors on the performance of Festuca ovina. This experiment was conducted in greenhouse conditions in a factorial arrangement based on a completely randomized design under the influence of the first factor of copper oxide treatment at two levels (50 and 100 mg / l), copper nano-oxide at two levels (50 and 100 mg / l), and control treatment, and the second factor of sodium chloride treatment at three levels (0, 200 and 400 mM) in five replicates on Festuca ovina in a hydroponic greenhouse. After two months of stress, changes in chlorophyll, potassium and air length were measured. Data were analyzed using a factorial experimental design and SNK multiple range test in SPSS.18 software. According to the results of this study, the Festuca ovina species, in addition to the ability to establish and grow in each of the conditions of salinity and pollutant stress, has the ability to establish in both conditions (salinity + pollutant). Therefore, it can be of particular interest to planners, managers of natural resources and the environment and recommended as a consistent species to improve the rangelands of these regions.
Ali Mohebbi; Naser Arabzadeh; Ali Ashraf Jafari; Ehsan Zandi Esfahan; Alireza Eftekhari
Volume 25, Issue 2 , August 2018, , Pages 335-343
Abstract
A large surface area of rangelands in Iran is degraded due to some different factors such as overgrazing, climate-change and so forth. Therefore, an important part of rangelands species is endangered. Rangeland improvement and rehabilitation as well as introducing tolerant species ...
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A large surface area of rangelands in Iran is degraded due to some different factors such as overgrazing, climate-change and so forth. Therefore, an important part of rangelands species is endangered. Rangeland improvement and rehabilitation as well as introducing tolerant species are of utmost importance towards rangeland sustainability. For this, the seeds of different accessions of most important perennial shrubs were collected from the rangelands in Kerman province and cultivated in the research station of Kerman province. A study was conducted in a randomized complete block design with three replications under field conditions, to comparing the germination and establishment of the accessions. Data analysis was performed using SAS software and mean comparisons were made by Duncan's multiple range test. According to the results, Fortuynia bungei showed a better germination and establishment rate as compared with other species. In addition, among the accessions, the highest establishment percentage was recorded for Kouhpayeh (53.03%) and Bam (52%) populations.
reza Siah mansour; Morteza Akbarzadeh; Ehsan Zandi Esfahan; Karim Khademi; seyd Akbar Javadi
Volume 22, Issue 3 , November 2015, , Pages 417-425