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Articles by Hossein Zahedi
Total Records ( 3 ) for Hossein Zahedi
  Mohammad Nasri , Mansoreh Khalatbari , Hossein Zahedi , Farzad Paknejad and Hamid Reza Tohidi Moghadam
  For study the effects of different levels of irrigating according to the 0, 25, 50 and 75% of field capacity to the amount of food less demand’s elements in the number of 5 and Rapeseed (Brassica napus) line this experiment randomized complete block design had been executed in the field at 2002-2003 in the research field of agricultural university of Varamin, Azad University. The amount of the needed fertilizer had consumed according to the soil analysis of the test site. At the end of the research for determining the amount of each element in each caring, the leaf samples had transferred to the laboratory and the necessary examination had been performed. The result had been Variance analyzed with the help SAS software and the comparison of the data average had executed with the help of the multi amplitude test of Duncan. According to the results of Variance analysis, the difference of elements in the numbers and different lines of Rapeseed (Brassica napus) and the different levels of irrigating and the counter effect of these two factors had been meaningful in the level of 1% and among the numbers only the element of Sulphur had the statistical meaningful difference. The variety of Hyola-42 and Mohican had allocated the first and the last statistical class to itself orderly with the average of 1.94 and 1.03%. The varieties were not meaningful in the case of the amount percentage of boron and Zn in the dry substance of leaf. Also in this study the different levels of irrigation has been meaningful effects on the amount of percentage of the elements 3. With increasing of the intensity of drought stress from 75-0% the F.C amount of element have shown the decreasing amount and Sulphur had reached from 1.98-1.01% and the Zinc had reached to the 15.2 mg from 29.6% in the dry substance of the leaf. However the amount of the results had shown the reduction but they were meaningless in the case of statistic.
  Mohammad Nasri , Hossein Zahedi , Hamid Reza Tohidi Moghadam , Farshad Ghooshchi and Farzad Paknejad
  In order to study of changing of macro elements in water stress condition an experimental design was carried out to study effect of different levels irrigation (0, 25, 50, 75) percentage of Field Capacity (FC) on changing macro elements (N, P, K) in 5 rapeseed genotypes (PF7045-01, Symbol, Mohican, Hyola-42, Syn-1). The experimental design split plot in Randomized Complete Block with 4 replication at 2004. Investigation was carried out in Varamin university field research. The information gain about the yield grain, number of pods per plant, number of seeds per pods, weight 1000 grain, oil percentage and yield oil. At the end of investigation, for to valued quantity each element in each treatment, sample of leaf transmits in laboratory and valued quantity elements N, P, K. As result that in, quantity element in different levels irrigation and interaction between the both of them were significant. Interaction between genotypes and levels irrigation were significant at the 0.01%. Basically table of ANOVA in all of the treatment, drought stress were cause decrease quantity elements at different genotypes exception element N that with increase intensity drought stress, percentage that was increase in leaves. The yield impressed genotypes and drought stress levels. With increase intensity drought stress of 0.75-0%, mean Field Capacity decreased of 3340-1788 kg h-1. Between genotypes, Hyola-42 and Symbol with mean 3377.5 and 1947 kg h-1 were highest and the lowest yield respectively. Oil seed percentage didn’t impress on genotypes but with increase intensity drought stress, decreased quantity and mean were of 43.1%, at treatment irrigation 75% FC, to 40.2% in treatment irrigation 0% and 25% FC. With increase intensity drought stress, the quantity saturation fats and glucosinolates seed increased and quality oil decreased.
  Mojtaba Mirakhori , Farzad Paknejad , Foad Moradi , Mohammadreza Ardakani , Hossein Zahedi and Parisa Nazeri
  Problem statement: In order to evaluate drought stress and methanol on yield and yield components of soybean in field experiments with factorial experiment inform of a randomized complete block design with three replication in field faculty of agricultural of Islamic Azad University Karaj, at 2008. First factor were sprayed aqueous solutions 0 (control), 7, 14.21, 28 and 35% (v/v) methanol by 3 times during growth season of soybean with 12 days intervals on shoot of soybean. Second factor were drought stress condition in two levels 40 and 70% base of depletion available soil moisture. Approach: This study measured grain yield, biomass HI, 1000 grain weigh, high plants, number of branch, diameter of stem, number of pod on plant, number of hollow pod. Results: Results of the experiment indicated that significant differences exist (p>0.05) between sprayed of solution methanol on parameters. Results also showed that was significant (p>0.05) differences between effect of drought stress levels on measured parameters. Effect of aqueous solution 14, 21 and 28% (v/v) methanol on measured parameters was greater than other treatments. Foliar application of 14 and 21% (v/v) methanol increased leaf area index, crop growth rate, pod growth rate, leaf area duration, pod yield, seed yield, weight of 1000 kernel, mature pods per plants. Conclusion: The lowest grain yield obtained in control and 35% (v/v) methanol treatments. Interaction effects were not significant.
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