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Articles by S.M. Hosseini
Total Records ( 3 ) for S.M. Hosseini
  M. Tabari , Jalali , Gh. A , A.R. Ali-Arab , M. Akbarinia and S.M. Hosseini
  Abstract: Due to failure of oak (Quercus castaneifolia C.A. Meyer) natural regeneration, investigation on the best acorn sowing depth of this species under different levels of canopy cover is an important consideration in the Caspian forests, north of Iran. For this purpose, a study site with north-facing slope, clay-loam soil and 260-280 m a.s.l. was chosen in a mixed oak forest. The experiment was conducted as a Complete Randomized Split Plot Design (CRSPD) and the measurements made in one growing season in nine fenced circular 1000 m2 plots with three canopy densities (25, 50 and 75%) at three soil depths (5, 10 and 15 cm). The results revealed that under all canopy densities the maximum seedling emergence occurred at 5 cm depth. The highest emergence rate was appeared in June and the lowest in October. Neither canopy density nor sowing depth did prominently reduce seedling establishment, but a high quotient of mortality likely could be attributed to rodent populations, particularly Hystrix indica. Under all canopies, ground line diameter decreased with increasing sowing depth, the biggest being at 5 cm depth. Neither canopy density nor sowing depth influenced the seedling height. It can be concluded that the best performance of Q. castaneifolia seedling occurs at 5 cm sowing depth and 25% canopy cover.
  A. Aghabarati , S.M. Hosseini , A. Esmaili and H. Maralian
  Effect of municipal effluent on survival, growth and mineral nutrient in Olea europaea L. trees were studied. A study was carried out at Tehran (Iran) in which olive trees were irrigated with municipal effluent and well water for a period of 7 years. We analyzed the soil; leaves and fruits of olive trees irrigated with municipal effluent and compared them with olive trees irrigated with well water. Observation included tree height, collar diameter, survival and plant mineral composition, mineral uptake and change in soil properties at 7 years of plant age. Application of municipal effluent produced better growth in Olea europaea L. trees. The trees irrigated with municipal effluent attained 3.26±0.07 m height, 13.35±0.41 cm collar diameter, but trees irrigated with well water attained 2.47±0.12 m height, 9.5±0.64 cm collar diameter at the age of 7 years. Irrigation with municipal effluent increases pH, EC, OM, NH4-N, NO3-N and PO4-P in soil. Concentration of N, P, K, Ca and Mg were greater in leaves and fruits of trees irrigated with municipal effluent than those of the leaves of trees irrigated with well water. Municipal effluent may be useful in tree irrigation to increase biomass productivity. Further, reduction of toxic concentration of metal ions in effluents may be helpful for a long-term field application.
  A. Aghabarati , S.M. Hosseini and H. Maralian
  The concentrations of Zn, Pb, Cr and Ni were measured in the soil, fruits and leaves of Olea europaea L. irrigated with municipal effluent. In this study, site irrigated with municipal effluent and site irrigated with well water for 7 years were sampled for soil and plant chemical analysis to evaluate its long term effect. Samples of irrigation water, soil and leaves and fruits of olive were analyzed for Zn, Pb, Cr and Ni. Heavy metals in municipal effluent were higher than the standard (WHO). Irrigation with municipal effluent increased Zn, Pb, Cr and Ni in soil compared to well water. The mean heavy metal concentrations in topsoil were higher than the standard (FAO) for all heavy metals except Cr. Plant Zn, Pb, Cr and Ni increased with 7 years of wastewater irrigation. The study concludes that the use of municipal effluent for irrigation has increased the contaminated products of Zn, Pb, Cr and Ni in soil and plant, but the contaminated products of Zn, Cr and Ni in fruits were below the permissible limits of the standard except Pb, after 7 years from this practice. Based on these results, it can be concluded that proper management of municipal effluent irrigation and periodic monitoring of soil and plant quality parameters are required to ensure successful, safe, long-term municipal effluent irrigation.
 
 
 
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