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Articles by L. Imanparast
Total Records ( 3 ) for L. Imanparast
  L. Imanparast and D. Hassanpanah
  In order to evaluation of drought stress tolerance of seven onobrychis genotype in vitro condition, was done in Ardabil, Iran in 2009. This experiment was performed by use of factorial design on the basis of completely randomized in three replications. A factor includes five osmotic potential levels (0, -3, -6, -9 and -12 bar) and B factor includes seven onobrychis genotypes (Syntetic, Mako Shoot, Osko Asfanjan, Khosro Shahr Tazekand, Osko Askandaran, Ardabil Garjan and Ardabil Hasanbarogh). For making the different osmotic potentials were used the PEG 10000 and distilled water as control. The variance analysis results showed that there is significant difference between drought levels, genotypes and their interaction as attributes such as coleoptile length, germination uniformity and percent, between drought different levels as attribute germination speed. The Synthetic genotype had the most coleoptile length, germination uniformity and germination percentage in -3 bar and control in compare of the other genotypes. Synthetic genotype showed the most tolerance to drought stress in comparison of the other genotypes and selected the tolerant genotype.
  L. Imanparast and D. Hassanpanah
  The direct measurement of erosion is very difficult and expensive. So use of erosion and sediment models is important to determine the amount of soil erosion. To determine the soil erodibility, has taken 300 soil samples from different fields with 0-12 cm depth that are located in the Aras sub watershed in North West of Iran in 2005-2006. The soil samples were analyzed and some factors such as soil texture, organic matter were measured. By use of the factors the other factors such as soil structure class, soil percolation class, total sand, fine sand, clay and silt percentage was measured. The study used the soil structure class and percolation to determine the soil erodibility. This study evaluates the effects of soil erodibility and the factors on sediments amount in the hydrological watersheds that have station to measure the sediment. Soil erodibility was measured by the formula follow this: 100K = 2.1M 1.4x0-4xz(12 - % OM)+3.25(S-2)+(P-3). Soil erodibility and some factors such as soil organic matter, fine sand percentage and soil structure class can predict the amount of soil erosion. Analysis of variance and the means comparisons with LSD test was done by MSTATC software. Linear correlation coefficients between different traits were done by SPSS software. The variance analysis results of the studied attributes showed that there is significant difference among the erodibility, fine sand and soil structure class. The studied location mean showed that Mashiran, Pole Almasi and Borran station in comparison the other locations, had the most erodibility. Soil erodibility cannot be the factor that has effect on the sediment producing in a station, alone. This factor must be evaluated with other factors such as soil organic matter, soil fine sand percentage, soil structure class, watershed area, topography and plant cover. In the prospective research, we should improve method to measure and calculate soil erodibility, strengthen the research on the mechanism of soil erodibility and conduct research on soil erodibility by both water and wind agents.
  K. Asadi Azad , M.J. Mirhadi , D. Hassanpanah , B. Delkhoush and L. Imanparast
  The nitrate accumulation is one of the problems in potato production that causes to decrease the production quality. The nitrate accumulation can have more reasons such as excess use of fertilizers. However, this research has studied to find the solution for this problem. This study evaluated some material effects such as the effect of K-Humate on nitrate accumulation. This experiment was performed according to the spilt plot and as base of the complete randomized design with three replications and two factors. Main factor included four levels of irrigation treatments; normal, normal with potassium humate, stress and stress with potassium humate. Sub factor included three potato cultivars; Ceaser, Satina and Agria. Variance analysis results showed significant differences in total yield, marketable yield and nitrate accumulation in tubers. Tuber the most yield was under normal with potassium humate in Ceaser and Satina cultivars and tuber the less yield was under stress condition in Agria cultivar. The nitrate accumulation decreased under stress with potassium humate condition.
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