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Articles by S. Shokri
Total Records ( 3 ) for S. Shokri
  S. Shokri , S.A. Siadat , Gh. Fathi , B. Maadi , A. Gilani and A.R. Abdali Mashhadi
  The aim of this study was to evaluate the effects of nitrogen fertilizer rates on dry matter remobilization among three rice cultivars. A field study was carried out at Ramin Agricultural and Natural Resources University. In 2007, a split plot experiment in the basis of randomized complete block design with three replications was used. Four nitrogen fertilizer rates (0, 100, 135 and 170 kg ha-1 from urea source) as the main plots and three rice cultivars (Champa, Anburi and LD183) as the sub plots were used. Results showed that nitrogen fertilizer rates had significant effect on dry matter remobilization amount in total shoot, stem and leaves in which among cultivars, LD183 had the highest amounts in terms of stem and total shoot dry matter remobilization. This amount was obtained at 0 kg ha-1 nitrogen fertilizer treatment. The highest rate of dry matter remobilization in leaves (except flag leaf) related to LD183 that obtained in 170 kg ha-1 nitrogen fertilizer level. Also, flag leaf of LD183 had the highest dry matter remobilization amount, although was not affected by nitrogen fertilizer rate. Thus, it seems that this part has important role in current photosynthesis at post anthesis stage compared with dry matter remobilization. According to our findings, flag leaf in Champa not only has no significant role in dry matter remobilization, but also act as a powerful sink for photosynthetic assimilates.
  S. Shokri and B. Maadi
  The aim of this study was to evaluate the effects of arbuscular mycorrhizal fungus on the mineral nutrition and yield of Trifolium alexandrinum plants under different salinity levels (2.2, 5 and 10 dS m-1). A pot experiment was conducted under glasshouse conditions in 2007. The results showed positive effects of inoculation with mycorrhizal fungi on total dry weight, root length and nutrient uptake of the T. alexandrinum at high and low salinity levels. Mycorrhizal colonization increased Total Dry Weight (TDW) of mycorrhizal plants 5.29 times more than control plants. In shoot system of non-AM plants, Na+ concentration was increased while the concentrations of K+, Mg2+ and Ca2+ were decreased with raising salinity stress. The Na+ level in shoots of AM plants showed slight increase with raising salinity levels. This experiment showed that phosphorus levels in the plants were reduced with increasing salinity but the AM plants showed higher values of phosphorus at all salinity levels. Thus, it could be concluded that AM fungi increased phosphorus uptake and saline stress in plants was thereby alleviated.
  M.H. Karimfar , S. Shokri , M.R Gholami , A. Bayat , N. Moosavinasab and A. Choobineh
  This study was conducted among workers of an Iranian zinc industry with the objective of determination of the prevalence rate of Musculoskeletal disorders (MSDs) among production workers. In this study, all 6 production units of the factory were studied. In each unit, 50% of the workers were randomly selected and included in the study. A total of 98 workers participated. The nordic musculoskeletal questionnaire was used as a collecting data tool to study the prevalence of MSDs. The vast majority of the study population (77.6%) had experienced some form of symptoms of musculoskeletal disorders during the last 12 months. The highest prevalence was reported in the lower back (47.9%) and upper back (34.6%). MSDs had occurred with a high rate among zinc workers. Corrective measures for reducing risk level seemed essential. Elimination of awkward postures and manual materials handling in the workplace were recommended.
 
 
 
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