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Articles by M. Nasiri
Total Records ( 3 ) for M. Nasiri
  D. Barari Tari , H. Pirdashti , M. Nasiri , A. Gazanchian and S.S. Hoseini
  In order to study the effects of transplanting date, planting spaces and nitrogen fertilization on morphological characteristics of rice promising line a field experiment was carried out in the Rice Research Institute of Iran (Amol). Experimental design was arranged in a split plot factorial in basis of completely randomized block design with three replications. Some agronomical traits such as panicle length, grain number per panicle, filled grains percentage, 1000 grains weight, fertile tiller numbers, flag leaf area, flag leaf angle, grain yield and harvest index were measured. Results showed that the effect of transplanting date on grain number per panicle was significant at 0.01 probability level. Also the effect of planting spaces on grain number per panicle and fertile tiller was significant at 0.05 and 0.01 probability level, respectively. Nitrogen fertilizer levels had significant effect on, flag leaf area, flag leaf angle, panicle length, 1000 grains weight and grain yield. According to results, 1000 grains weight, harvest index and filled grains percentage had the most correlation with grain yield, respectively. For this line, transplanting date at May 12, planting space at 20x20 cm and 115 kg N ha-1 for the best performance of yield attributes were recommended.
  Y. Nicknejad , R. Zarghami , M. Nasiri , H. Pirdashti , D.B. Tari and H. Fallah
  An experiment was conducted at Iran Rice Research Institute-Deputy of Mazandaran (Amol) in 2007, to study the physiological and morphological indices of different rice varieties. The experiment was carried out with, Factorial experiment in randomized completely block design comprising four replications. Studied factors were limitation of source and sink in 4 treatments viz., (1) cut all of leaves except flag leaf, (2) cut flag leaves, (3) cut 1/3 end of panicle and (4) control. Variety in four treatment was as Tarom, Neda, Shafagh and Fajr. Completion of source and sink limitation treatments were carried out at 50% flowering stage. Results showed that the most CGR was related to Shafagh variety (25.18 g/m2/day) in 1650 GDD and the least CGR was produced in the Tarom variety (21.1 g/m2/day) in 1452 GDD. The most RGR was obtained in the Shafagh and the least RGR was obtained in the Neda variety at the 850 GDD. Completion source and sink limitation treatments on leaf area index showed that cut all leaves except flag leaves had least leaf area index also with cut all of leaves and flag leaves in all of varieties the RGR was decreased. Results of morphological characteristics measurement showed that highest plant height and least plant height were produced in the Tarom and Shafag varieties, respectively. Maximum leaves number in the Tarom variety was produced in the 1180 GDD. Also, the Neda variety with produced 24 tillers per plant had most tiller number. The Tarom variety with coefficient 81.25% had most conversion all tillers to fertile tiller percentage.
  M.A. Alizadeh , H.A. Arab , R. Tabaie and M. Nasiri
  In greenhouse experiment, the seed samples of 3 populations were treated with treatments including: cold stratification, Gibberlic Acid (50 ppm and 100 ppm), Potassium nitrate (0.2%, 0.4%), physical scarification (sand paper), chemical scarification (Ethylic alcohol 70%) and distilled water (control), then these treated seed samples were sown in pots as randomize design with three replication. The germination characteristics including: germination percentage, speed of germination, length of root and shoot, seedling length, ratio of root length by shoot length, vigor index, fresh weight and dry weight, ratio of dry weight by fresh weight were evaluated during 45 days of experiment. Comparing between three populations of Sahandy savory, seed germination characteristics of the Ghazvin population was higher than the other two populations. According to effect of treatment on germination seed characteristics, the species of savory and their population, it was concluded that effect of Gibberlic Acid and Potassium nitrate was higher than physical scarification and chemical scarification comparing with control. With more effective of gibberlic acid and KNO3 and cold treatment on seed germination enhancement of the population, it was clarified that the type of dormancy of some population of Sahandy savory was physiological dormancy.
 
 
 
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