Browsing by Author "Mojiri, Amin"
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Item Effects of municipal wastewater on physical and chemical properties of saline soil(Uludağ Üniversitesi, 2011) Mojiri, AminA study was carried out to investigate the effects of municipal wastewater treatments on physical and chemical properties of saline soil. Recently, the amounts of wastewater are sharply increasing and the kinds of pollutants are also varied as the world wide industry is being developed incessantly. Soil samplings of 0-20 cm depth were from Segzi plain in Isfahan province (the center of Iran). The experiment was carried out at green house. The experiment consisted of 4 treatments including soil without irrigated (T1), soil irrigated with 100 ml of wastewater (T2), 200 ml of wastewater (T3) and 300ml of wastewater (T4) for everyday were taken as experimental unit. Soil reaction (pH), electrical conductivity (EC), organic matter (OM), total nitrogen (TN), phosphorus (P), potassium (K), sodium ions (Na), chloride ions (Cl), extractable iron (Fe), cadmium (Cd), zinc (Zn) and bulk density (BD) were determined. Soil irrigated with wastewater caused increase of EC, P, OM, TN, K, Na, Cl, Fe, Cd and Zn but it caused a decrease of soil pH. This result showed that soil irrigated with wastewater caused a decreased of BD.Item Impact of silicon on decreasing of salinity stress in greenhouse cucumber (Cucumis sativus L.) in soilless culture(Uludağ Üniversitesi, 2012) Amirossadat, Zahra; Ghehsareh, Ahmad Mohammadi; Mojiri, AminSalinity is one of the environmental threats to agriculture. A study was carried out to investigate impact of silicon on decreasing of salinity stress in greenhouse cucumber (Cucumis sativus L.) in soilless culture. Seeds of cucumber were sown in polystyrene boxes with a substrate composed of 50% peat and 50% perlite. After 40 days (after germination), seedlings were transferred to plastic containers with 17 liter volumes. Five levels of silicon by sodium silicate (NaSiO3) were considered including 0, 25, 50, 75 and 100 mg.L-1 using sodium silicate in nutrient solution. Salinity levels in the final nutrient solution were considered including 2.5, 3.5 and 4.5 (dS.m-1) using sodium chloride. After five weeks, samples were taken for testing. Maximum plant height, wet weight, dry weight (cm) and total chlorophyll (mg/g fresh weight) equal to 82.6, 333.4, 44.7 and 14.700 were recorded in No. 3 (EC=2.5 dS.m-1 and Si= 50 mg.L-1), 1 (EC= 2.5 dS.m-1 and Si=0 mg.L-1), 5 (EC=2.5 dS.m-1 and Si= 100 mg.L-1) and 2 (EC=2.5 dS.m-1 and Si= 25 mg.L-1), respectively. Minimum plant height, wet weight, dry weight (cm) and total chlorophyll (mg/g fresh weight) equal to 62.3, 281.7, 26.2 and 8.22 were recorded in No. 7 (EC=3.5 dS.m-1 and Si= 25 mg.L-1), 8 (EC=3.5 dS.m-1 and Si= 50 mg.L-1), 12 (EC=4.5 dS.m-1 and Si= 25 mg.L-1) and 7, respectively. The evidences provided by this experiment indicated that silicate has increased resistance of plant against salinity. Silicate caused an increase of chlorophyll content but it caused a decrease of plant height.Item The potential of corn (Zea mays) for phytoremediation of soil contaminated with cadmium and lead(Uludağ Üniversitesi, 2011) Mojiri, AminA study was carried out to investigate the potential of Corn (Zea mays) for phytoremediation of soil contaminated with Cadmium and Lead. Soil samplings of 0-20 cm depth were taken from the Chaharmahal Bakhtiari province in the western of Iran. Corn plantlets were planted in pots containing 3 kg of these soils. The experiment consisted of 9 treatments including soil without cadmium and Lead (T1), soil contaminated with 2 mg/kg concentration of cadmium (T2), soil contaminated with 4 mg/kg concentration of cadmium (T3), soil contaminated with 8 mg/kg concentration of cadmium (T4), soil contaminated with 16 mg/kg concentration of cadmium (T5), soil contaminated with 6 mg/kg concentration of Pb (T6), soil contaminated with 12 mg/kg concentration of Pb (T7), soil contaminated with 18 mg/kg concentration of Pb (T8) and soil contaminated with 24 mg/kg concentration of Pb (T9). Samples were taken for testing, after 60 days. Physical and chemical characteristics of soil such as soil texture, cation exchange capacity, pH, electrical conductivity, organic matter and extractable cadmium and lead were measured before and after the test. The evidences provided by this experiment indicated that Corn is an effective accumulator plant for phytoremediation of cadmium and lead polluted soils.Item Relationship between growth of atriplex species and some soil properties in Khoor (Iran)(Uludağ Üniversitesi, 2012) Poodeh, Hedayat Dehghani; Mojiri, AminAtriplex species are planted in the desert area of central of Iran for prevent the spread of blowing sand. Atriplex species have tremendous ability to grow in saline conditions. The study was carried out to investigate the effects of soil properties on growth of Atriplex species in Khoor plain (Iran). Khoor plain is in Naeen area and is located in the Eastern of Isfahan province (the center of Iran). Soil properties such as electrical conductivity (EC), soil reaction (pH), the percentage of clay and sand, the percentage of calcium carbonate and gypsum, sodium ions, chloride ions, potassium, phosphorus and total nitrogen were measured. Atriplex physiological parameters including height and top were measured. The evidences provided by this experiment that the soil EC, pH, sodium ions, chloride ions and the percentage of clay had negative effects on Atriplex physiological parameters but the percentage of sand and calcium carbonate had positive effects on Atriplex physiological parameters. The percentage of gypsum, potassium and total nitrogen did not have significant effects on plant physiological parameters.