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Articles by A. Salehi
Total Records ( 4 ) for A. Salehi
  M. Tabari , A. Salehi and A.R. Ali-Arab
  A case study was undertaken to assess the long-term effects of irrigation with municipal waste water on heavy metals contamination of soil and leaf of black locust (Robinia pseudoacacia L.) trees. For this purpose, a field study was conducted at two sites irrigated by waste water and well water in the suburban areas of Tehran, Iran. Samples of irrigation water, soil and tree leaf were collected and were analyzed for Mn, Fe, Cr and Cd concentrations. Results indicated that municipal waste water had higher significantly (p<0.01) amount of Mn, Fe and Cr compared to well water. These heavy metals in waste water were upon the internationally recommended (WHO) maximum permissible limits set for land use. Heavy metals accumulation of soil was significantly greater in waste water-irrigated site and in depth of 0-15 cm. The mean of heavy metals concentration in soil was below the standard for all heavy metals. Fe and Mn concentrations in leaf of trees irrigated with waste water were significantly greater than those in well water but without risk. Cr and Cd were not detected in leaves and also Cd in water and soil samples. It was concluded that the use of waste water in irrigation might enriched soils with heavy metals to concentrations that may pose potential environmental and health risks in the long-term. Hence regulations about the utilization of waste water in irrigation should consider for control heavy metals content that may be added to soil, in order to minimize the risk of negative effects to ecosystem health.
  S. Ghazanfari , H. Kermanshahi , M.R. Nassiry , A. Golian , A.R.H. Moussavi and A. Salehi
  The aim of this study was to investigate the effects of feed restriction and different energy and protein contents of the diet on performance and growth hormone concentration in broiler chicken. Five hundred and seventy six day old Ross male broiler chicks were used in a 2x2x3 factorial arrangements in a completely randomized design experiment. Feeding programs consisted of ad libitum and Skip-a-Day (SAD) feed restriction, two energy levels (3100 and 2800 kcal ME kg-1) and three protein levels (22.3, 19.3 and 16.3% CP). Feed restriction (SAD) was applied during 22-32 d of age. Corn-soybean meal based diets containing vegetable oil were used. Body weight and feed intake were recorded weekly. At 21, 32 and 49 day of age, one bird from four replicate of each treatment was selected randomly to collect blood sample and then carcass, breast and thigh weight were measured. Blood samples assayed for Growth Hormone (GH) concentration by RIA. Feed restriction decreased feed intake and body weight gain (p<0.001) of birds during 22-32 and feed intake during 32- 49 day of age, while body weight gain was not affected during this period. Also, feed restriction decreased Feed Conversion Ratio (FCR) (p<0.01) and body weight gain (p<0.001) during 22-32 day of age. Feed intake (p<0.001) and body weight gain increased in broilers fed on low-energy diets compared with those fed on high-energy diets during different periods. Increasing levels of protein increased feed intake (p<0.001), body weight gain and improved FCR (p<0.001) as compared with least level of protein. Feed restriction decreased carcass percentage (p<0.001) and increased thigh percentage (p<0.01) at 32 day of age. Carcass percentage (P<0.05) and breast percentage increased in broilers fed on low-energy diets compared with those fed on high-energy diets during different periods. The low protein diet decreased carcass percentage (p<0.01), breast percentage (p<0.001) during different periods and thigh percentage (p<0.05) at 21 day of age. The result of this experiment indicated that the lowest protein level had the highest growth hormone concentration at 49 day of age. The low energy diet increased growth hormone concentration (p<0.05) at 21 day of age.
  A. Rahimi , Sh. Jahanbin , A. Salehi and H. Farajee
  Background and Objective: Drought is one of the factors that affect medicinal plants and on the other hand, the role of mycorrhizal fungi was effective in improving the performance of some medicinal plants exposed to water stress. For this purpose, an experiment was conducted as split-plot in randomized complete block design with 3 replications in the Boyerahmad region at years 2015 and 2016. Materials and Methods: The experiment factors were considered of irrigation levels (main-plot) as irrigation after S1 = 30, S2 = 60, S3 = 90, S4 = 120 and S5 = 150 mm water evaporation from evaporation pan class A and mycorrhiza fungi (sub-plot) were considered at the levels of non application (NM), application with mycorrhiza fungi species of Glomus mosseae (GM) and Glomus intraradices (GI). Results: Results showed that the effect of year on the studied traits of borage was not significant but the interaction of water stress and mycorrhizal fungi on chlorophyll a, chlorophyll b, total chlorophyll, carotenoids, flowers phosphorus, grain phosphorous and leaf relative water content of borage were significant. Irrigation after 30 and 60 mm evaporation from pan evaporation+without and the use of mycorrhizal fungi of water Glomus mosseae and Glomus intraradices proportion to irrigation after 150 mm evaporation from pan evaporation+without application and the use of mycorrhizal fungi increased studied characteristic of borage. Conclusion: The results of this study was showing to decrease in the properties of borage medicinal plant as a result of drought stress but the application of mycorrhizal fungi could increase borage traits in drought stress conditions in the study and decrease of the negative effects of drought stress.
  M. Tabari and A. Salehi
  To obtain estimates of carbon sequestered following afforestation, we studied the amount of soil carbon sequestration in two 15-year old stands of needle-leaved eldar pine (Pinus eldarica Medw.) and broad-leaved black locust (Robinia pseudoacacia L.) and a control area (without afforestation) in South of Tehran, Iran. For this purpose, sample plots (30x30 m) were randomly chosen in either site. In each plot, samples from depths of 0-15, 15-30 and 30-60 cm of four soil profiles were taken for investigations. In laboratory, Soil Organic Carbon (SOC) content of samples was determined by the Walkley-Black method. No significant difference in the amount of soil carbon sequestration of two stands was detected, but each stand sequestered higher carbon content in soil compared to that of in control area. In all soil samples, the highest carbon sequestration was observed in upper layer of soil. Likewise, values of growth and biomass of eldar pine trees were greater than those of black locust trees. It was concluded that there is a great potential of afforestation, in increasing of soil carbon sequestration.
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