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Articles by M.R. Ardakani
Total Records ( 7 ) for M.R. Ardakani
  N.A. Sajedi , M.R. Ardakani , A. Naderi , H. Madani and M. Mashhadi Akbar Boojar
  Problem statement: To investigate the effect of nutrient application on agronomical characteristic and water use efficiency under water deficit stress of hybrid maize 704, an experiment was arranged in a split plot factorial based on a complete randomized block design with four replicates in the research station of Islamic Azad University-Arak Branch, Iran in 2007. Approach: Main factors studied were four irrigation levels including irrigation equal to crop water requirement, water deficit stress at eight-leaf stage (V8), stage of blister (R2) and stage of filling grain in the main plot. Combined levels of selenium treatment (without and with application 20 g ha-1) were applied 2 weeks before execution of water stress treatment and micronutrients (without and with application) that was provided by specific fertilizer for maize called "Biomin", which contained Fe, Zn, Cu, Mn, B, Mo and Mg in the form of foliar application at six-leaf stage and 1 week before tasseling stage at the rate of 2 L ha-1 were situated in sub plots. Results: Results indicated that effect of water deficit stress on 1000 grain weight, grain yield, harvest index and water use efficiency at different growth stages was significant at 1% level. Water deficit stress decreased grain yield 33% in grain filling stage as compared with control. Using selenium increased mentioned traits but the increase was non significant. Effects of twofold interactions of water deficit stress and selenium showed that using selenium in water deficit stress condition increased measured traits as compared with treatment without selenium. A negative antagonistic interaction was found between selenium and micronutrients on some measured traits. In between treatments of water deficit stress, highest grain yield (8159.33 kg ha-1) was obtained from combined treatment of water deficit stress at eight-leaf stage with selenium application and without micronutrients which compared with treatment of irrigation equal to crop water requirement, without selenium and microelements did not differ significant. Conclusion: According to the results of experiment, using microelements in optimum water availability and using selenium in water deficit stress condition increased mentioned traits as compared to treatments control.
  M. Mirzakhani , M.R. Ardakani , A. Aeene Band , F. Rejali and A.H. Shirani Rad
  Problem statement: In order to evaluate the effects of co-inoculation of Azotobacter and Mycorrhiza with nitrogen and phosphorus levels on yield and yield components of spring safflower, this study was carried out in the experimental field of Farahan University in Markazi province- Iran in 2006. Approach: A factorial experiment in the form of complete randomized block design with three replications has been used. Inoculation of Azotobacter (without and with inoculation by Azotobacter chroococum) and Mycorrhiza (without and with inoculation by Glomus intraradices) under different levels of nitrogen and phosphorus levels [F0 = N0+P0(kg ha-1), F1 = N50+P25(kg ha-1), F2 = N100+P50(kg ha-1) and F3 = N150+P75(kg ha-1)] on spring safflower (Carthamus tinctorius L.-cv. IL-111) have been studied. Results: In this study some characteristics such as: Harvest index, hectolitre weight, root dry weight, seed yield, mycorrhizal root colonization, number of days to maturity were assessed. Results indicated that treatment (A1M1F2) with average grain yield 1239 (kg ha-1) and treatment (A0M1F0) with average grain yield 723.7 (kg ha-1) were significantly higher than other treatments. Seed inoculation at the planting date with Azotobacter and Mycorrhiza caused increasing grain yield about 6.13% in compare with control treatment. Conclusion: Seed yield and yield components of safflower have been affected significantly by the inoculation with Azotobacter and Mycorrhiza, because these biofertilizers can fix atmospheric nitrogen and increase phosphorus availability in soil and enhanced absorb elements by safflower.
  M.R. Ardakani , G. Pietsch , A. Moghaddam , A. Raza and J.K. Friedel
  Problem statement: It is generally considered that root turnover is a major contributor to organic matter and mineral nutrient cycles in organic managed agroecosystems. Approach: This study designed to investigate whether microbial activity could affect on root properties of Lucerne in an organically managed field under dry weather conditions. The trial was laid out as a factorial experiment in the fields of the University of Natural Resources and Applied Life Sciences, Vienna- Austria at Raasdorf in 2007. The experimental factors of Rhizobium (Sinorhizobium meliloti) and Arbuscular Mycorrhiza (AM) including Glomus etunicatum, G. intraradices and G. claroideum and irrigation levels were tested. Results: Results showed that increasing water deficit affected root dry weigh, specific root mass and root length significantly at 1% level and co-inoculation of rhizobium and mycorrhiza with irrigation increased all root parameters. Data’s of variance analysis for mycorrhizal colonization showed that main effect of using mycorrhiza had significant effects on root parameters at 5 and 1% probability level at first and second harvest, respectively. Results of mean comparisons by Duncan’s Multiple Range Test showed that mycorrhizal colonization was higher in the inoculated treatments by rhizobium, mycorrhiza and irrigated plots in both harvests. Double interaction of mycorrhiza and irrigation was higher in both harvests (37.05 and 65.73%, respectively). Conclusion: It can be suggested that the tripartite symbiosis of Rhizobium, AM and Lucerne can improve the performance of Lucerne in organic farming and under dry conditions. Such traits could be incorporated into breeding programs to improve drought tolerance especially in organic fields.
  S. Ghorbani , B.N. Khiabani , I. Amini , M.R. Ardakani , H. Pirdashti and S.R. Moakhar
  In order to study the influence of iron and zinc elements on yield and yield components of wheat mutant lines during 2006-2007, an experiment was conducted in form of factorial based on complete randomized block design with four replications. Factors include genotype (Tabasi, T-65-7-1, T-65-5-1, T-66-67-60, T-65-58-8) and fertilizer [N, N+Fe, N+Zn, N+Fe+Zn]. Results showed that genotype had high significant effect on GY, by, HI, grain number per spike and spike number per square meter. Iron and zinc fertilizers had significant effect on grain yield and harvest index. Biological yield was not significantly different by imposing of mentioned fertilizer applications. Seed number in spike correlated with seed weight in per spike. Spike number in plant had correlation with spike number in m2, straw yield and hectoliter seed weight. Seed weight in per spike had relationship with grain yield, harvest index and thousand seed weight.
  M.R. Ardakani , S. Teimuri , M. Rezvani , H. Fathollahi , A. Khorasani , F. Rejali , A. Raza and F. Zafarian
  This study designed to investigate more precise of mycorrhizal symbiosis in order to increasing mineral absorption by plant root system. Three pot experiments, radioactive with 32P, non-radioactive and a trial with selected strain (from first and second trials) with heavy metals (Cd, Co and Pb) contaminated soil were set up for evaluation the efficacy of four mycorrhizae strains including Glomus mosseae, G. etanicatum, G. intraradices, mixed strains (combination of G. mosseae, Gigarpora hartiga and G. fasciculatum) in order to investigate the uptake, translocation and distribution of 32P, P and also dry matter in barely in a glass house. Radioactive phosphorus (32P) was used in this study. Results revealed that G. mosseae had the highest amount of P uptake in comparison with other strains. It indicates that differences exist among mycorrhizae strains towards 32P uptake and its transportation to shoot. Increased strain count of G. mosseae was found in contaminated pots in trial with contaminated soil along with higher P concentration in root and shoot than non-inoculated plant roots.
  S. Samarbakhsh , F. Rejali , M.R. Ardakani , F. Pak Nejad and Mohammad Miransari
  With respect to the significance of the combined effects of fungicides application and Arbuscular Mycorrhizal fungi on the growth and yield of different crop plants such as corn (Zea mays L.) a field experiment was conducted. The objectives were to determine: (1) the combined effects of different fungicides and different arbuscular mycorrhiza (AM) species on the growth and yield of corn and (2) the efficiency of different AM species in symbiosis with corn plants, treated by different fungicides, under field conditions. Four AM treatments including control (M0), Glomus mosseae (M1), G. etunicatum (M2) and G. intraradices (M3) and four fungicide treatments including control (F0), benomyl (F1), vitavax (F2) and captan (F3) were tested in a factorial fashion on the basis of a completely randomized block design in three replicates in 2006. Different species of AM significantly affected corn growth and yield when subjected to different fungicides treatments. G. mosseae and corn plants established the most efficient symbiosis. In addition, fungicide benomyl had the least unfavorable effects on the colonization of corn roots by AM species. Determination of the appropriate rates of fungicides for treating seeds to alleviate the unfavorable effects of fungicides on plant growth, especially when in symbiosis with AM species, is of great significance.
  Saghar Rasaei Moakhar , B.Naserian. Khiabani , I. Amini , M.R. Ardakani , H. Pirdashti and S. Ghorbani
  In order to evaluate the reaction of yield and yield components of wheat’s mutant lines to different levels of nitrogen in the crop year of 2006-2007, an experiment was conducted as factorial based on completely randomized block design in 4 replicates in the Research Farm of Agricultural, Medical and Industrial Research School in Zaferaniyeh-Karaj-Iran the first factor included 5 genotypes of wheat (Tabasi-the maternal entity, T-65-7-1, T-65-5-1, T-6-67-60, T-65-58-8) and the second factor consisted of 4 levels of nitrogen (100, 140, 180 and 220 kg ha-1 urea 46%). The result showed that grain’s yield harvest index, number of grain/spike in mutant lines and their parent had significant difference (p<0.01) in mutant genotypes, meanwhile, the biological yield and the number of spike m-2 were not significant difference (p<0.05). The harvest index, number of grains per spike, grain’s yield, biologic yield and number of spikes m-2, weight of 1000 grains didn’t affected by applying different levels of nitrogen fertilizer.
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