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  1 - Assesment of Relationships between Seed Yield and Some Morphophysiological Traits of Bread Wheat Genotypes under Rainfed and Supplementary Irrigation Conditions
  Saman Motazedi Saeed Seifzadeh Reza HagParast HamidReza Zakerin Hamid Jabbari Jahanfar daneshian
  10.30495/jcep.2019.664834
  Relationship, between seed yield and it morphological characteristics and their relative importance in 25 bread wheat genotypes under both rain-fed and supplementary irrigation conditions studied using a randomized complete block design with three replications were eval More

  Relationship, between seed yield and it morphological characteristics and their relative importance in 25 bread wheat genotypes under both rain-fed and supplementary irrigation conditions studied using a randomized complete block design with three replications were evaluated during growing seasons of 2014 and 2016 at the Kermanshah’s Sararud Rainfed Agricultural Research Station. Analysis of variance showed that all traits under study, except spike length, exhibited significant differences in rainfed and supplementary irrigation condition. In supplementary irrigation conditions, these traits showed higher values as compared to those of rainfed condition. The application of supplementary irrigation resulted in reduced leaf and canopy temperatures. The coefficients of simple correlation between the traits, for both of the rain-fed and supplementary irrigation systems, indicated that cell membrane stability, flag leaf length, straw yield, relative water content, 1000 seed weight, chlorophyll content, leaf and canopy temperatures were maximally correlated with the seed yield. Traits like straw yield and flag leaf length were inserted into the regression model of rainfed irrigation condition and traits such as the straw yield, flag leaf length, relative water content and spike yield were also inserted into the regression model of supplementary irrigation condition the results demonstrated that the former traits accounted for 0.741 of the seed yield variations and the latter traits explained 0.899 of the seed yield variation. Path coefficient analysis showed highest positive direct effect on seed yield in rain-fed condition, and straw yield and flag leaf length, relative water content, flag leaf length and spike yield in supplementary irrigation condition. Based on the results of this study, straw yield was found to be the most important indicator to select for higher yielding varieties of wheat under both rainfed and supplementar irrigation conditions. Manuscript profile
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  2 - Effect of Irrigation and Nitrogen Fertilizer Levels on Physiological Characteristics of Four Varieties of Barley (Hordeum vulgare L.)
  Farshad Sorkhi
  This field study was conducted in a factorial split plot experiment based on randomized complete block design with three replications to evaluate the effect of irrigation and nitrogen fertilizer levels on physiological characteristics of four varieties of barley (Hordeu More

  This field study was conducted in a factorial split plot experiment based on randomized complete block design with three replications to evaluate the effect of irrigation and nitrogen fertilizer levels on physiological characteristics of four varieties of barley (Hordeum vulgare) during 2012 in Azad University of Miandoab. Irrigation levels were full irrigation, cutting off irrigation at boot stage (code 40 scale zadoks) and cutting off irrigation at flowering stage (code 60 scale zadoks). Nitrogen levels were 20, 40, 60 and 80 kg ha-1. Varieties under study were ‘Makuyi’, ‘Valfajr’, ‘Sahra’ and ‘Jonoob’. Traits studied were seed yield, flag leaf area, chlorophyll content of flag leaf and proline content of flag leaf, and peducle length. The results showed that highest grain yield, flag leaf area, chlorophyll content of flag leaf and proline content were obtained by using 80 kg.ha-1 nitrogen. Data collected also showed that at 80 kg.ha-1 nitrogen and full irrigation, the highest and lowest grain yield, flag leaf area, chlorophyll content of flag leaf belonged  to ‘Makuyi’ and Jonoob, respectively. However, cuuting off irrigation at boot stage resulted in highest and lowest grain yield, flag leaf area, chlorophyll content of flag leaf to Jonoob and Valfajr, respectively. Cutting off irrigation at flowering stage decreased grain yield and increased proline content in ‘Makuyi’ and ‘Valfajr’. However, lowest reduction in grain yield, and highest increase in proline content were measured in ‘Sahra’ and ‘Jonoob’ varieties. Decreasing slope of regression curves was higher in ‘Makuyi’ and ‘Valfajr’. This indicates that cutting off irrigation at flowering stage reduced yield and increased proline content of these varieties compared to ‘Sahra’ and ‘Jonoob’. Manuscript profile
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  3 - The combined role of mycorrhizal fungi and phosphorus fertilizer on nutrient uptake of shoot in barley under rainfed conditions
  Rahim Naseri Amir Mirzaei Amin Abbasi
  10.30495/iper.2022.690265
  In order to investigate the effect of mycorrhiza fungi on nutrient uptake of barley in rain fed conditions, a field experiment was carried out in factorial analysis based on randomized complete block design with three replications at the farm station of Sarablah Agricul More

  In order to investigate the effect of mycorrhiza fungi on nutrient uptake of barley in rain fed conditions, a field experiment was carried out in factorial analysis based on randomized complete block design with three replications at the farm station of Sarablah Agricultural Research Center, Ilam during 2019-2020 cropping season. Experimental factors were four barley cultivars (Mahali, Mahoor, Khoram, and Fardan) and fertilizer application including: control (without fertilizer application and mycorrhizal fungi), 50% P chemical fertilizer recommended based on soil test (25 keg/ha), mycorrhizal fungi (Glomus mosseae, Glomus etunicatum, and Rhizophagus irregularis), mycorrhizal fungi along with 50% P chemical fertilizer, and 100% P chemical fertilizer as recommended. Results indicated that interaction between cultivar and fertilizer sources had significant effect on nitrogen, phosphorus, potassium, magnesium, iron, copper, and manganese. Interaction of Fardan cultivar and mycorrhizal fungi + 50% phosphorus fertilizer resulted in the highest nitrogen (11.1%), phosphorus (1.19%), potassium (3.92%), magnesium (0.292%), iron (136.5 mg.kg-1) manganese (65.8 mg.kg-1), and copper (65.71 mg.kg-1) in leaves. According to the obtained results, in the rain fed conditions, the new cultivar Fardan is recommended with mycorrhizal fungi along with 50% phosphorus fertilizer given the high concentration of high macro elements (nitrogen, phosphorus, potassium and magnesium) and micro elements (iron, manganese, and copper) and the role of these elements in plant growth and photosynthesis  Manuscript profile
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  4 - Study on physiological characteristics of bread wheat genotypes response to water stress after anthesis and zinc foliar application
  Davood Afiuni غلامعباس اکبری ایرج اله دادی G. Najafian L. Safaei
  In many regions, drought stress occurs at the terminal stages of wheat growth. Identifying the physiological responses of plant can help in produce tolerant varieties. In a two years study in Isfahan, effect of three treatments included normal irrigation, drought stress More

  In many regions, drought stress occurs at the terminal stages of wheat growth. Identifying the physiological responses of plant can help in produce tolerant varieties. In a two years study in Isfahan, effect of three treatments included normal irrigation, drought stress after anthesis, and drought stress after anthesis with two times zinc foliar application at vegetative growth on 11 wheat genotypes were studied as RCBD with split- plot arrangement and three replications. RWC, RWL, ELWR and IWC were measured on flag leaf at 3 stages including anthesis and one and two weeks after anthesis. Proline, soluble proteins and grain yield also were measured. Comparing normal condition, in drought treatment, RWC, RWL and IWC decreased and ELWR increased at both one and two weeks after anthesis. Drought stress also decreased soluble protein and grain yield and increased proline. Zinc foliar application mitigated negative impacts of drought stress, so that grain yield, RWC (at one and two weeks after anthesis), and IWC (at two week after anthesis) were higher in drought + zinc than drought without zinc. There were significant differences among genotypes for all traits. Under drought stress, there were positive significant correlations between grain yield with soluble proteins, RWC (at one and two weeks after anthesis) and ELWR (at anthesis), indicating the capability of these traits as selection criteria for improvement of terminal drought tolerant wheat varieties. Manuscript profile
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  5 - Effects of supplemental irrigation and nitrogen levels on seed yield and some morphophysiological traits of two drlyland wheat cultivars
  حمزه Felehkari M.E. Ghobadi G. Mohammadi S.J. Honarmand M. Ghobadi
  Irrigation and nutrition are two most important factors in increasing crop grain yield. In order to elevate the effects of supplemental irrigation and nitrogen levels on grain yield and morphophysiological traits of two wheat cultivars, an experiment was carried out at More

  Irrigation and nutrition are two most important factors in increasing crop grain yield. In order to elevate the effects of supplemental irrigation and nitrogen levels on grain yield and morphophysiological traits of two wheat cultivars, an experiment was carried out at research Farm of Razi University in Kermanshah in 2008-2009. The experiment was conducted as split plots arranged in randomized complete blocks design with three replications. Treatments included supplemental irrigation [control (dryland) and irrigation during stem elongation, anthesis and grain filling] in main plots, nitrogen at 4 levels (0, 50, 100 and 150 kg ha-1) (N net from urea source) in sub plots and two wheat cultivars ("Sardari" and "Cross-Alborz") in sub-sub plots. Supplemental irrigation had higher flag leaf area and chlorophyll contents than dryland state. Application of 150 kg ha-1 N produced higher flag leaf area. Supplemental irrigation had higher flag leaf area at anthesis and grain filling stages. The highest of grain yield was obtained with supplemental irrigation at anthesis (3622 kg ha-1) and booting stages (3520 kg ha-1). Cross alborz cultivar (with 3378 kg ha-1) was better in grain yield than Sardari cultivar (2982 kg ha-1). Based on the results of this experiment, supplemental irrigation at Anthesis or stem elongation stage has greater impact on grain yield and physiological traits compared to the grain filling stage. Also, application of 50 kg N ha-1 had higher grain yield (3350 kg ha-1). Manuscript profile
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  6 - Effect of source-sink limitation on agronomic traits and grain yield of different lines of rice (Oryza sativa L.)
  Morteza Moballeghi Nuralah Kheyri Saleh Hatami Ali Mohaddesi
  In order to study the effect of source-sink limitations on agronomic traits and grain yield of different lines of rice, a field experiment was carried out as factorial in a randomized complete block design with four replications in Chaparsar Rice Research station of Maz More

  In order to study the effect of source-sink limitations on agronomic traits and grain yield of different lines of rice, a field experiment was carried out as factorial in a randomized complete block design with four replications in Chaparsar Rice Research station of Mazandaran province in 2013. Treatments of source-sink limitation in four levels (including cutting of flag leaf, cutting of one third the end of panicle, cutting of other leaves except flag leaf and control or without limitation) and lines of rice in four levels (line of No. 3, line of No. 6, line of No. 7 and line of No. 8) were the treatments. Among different lines, the maximum 1000-grain weight and panicle fertility percentage were obtained in lines of No.7 (33.3 gr) and 8, respectively. The maximum panicle length (29.7 cm), number of fertile tiller per plant (21.4 N.o) and unfilled grain number per panicle (71.5 N.o) were observed in line of No. 3, but the line of No.6 had the highest total grain number per panicle (210.9). Among different source-sink limitation treatments, increased the panicle length and unfilled grain number per panicle and decreased the panicle fertility percentage, when all leaves except flag leaf removed. Also interaction effect of two factor showed that the highest grain yield (6531 kg.ha-1 was obtained in line of No.7 and control treatment. The lowest grain yield (4166.3) kg.ha-1 was observed in line of No.6 and cutting of leaves except flag leaf. In general, it can be concluded that among lines, the line of No.7 had the sink limitation and other lines (No.3, No.6 and No.8) had the source limitation. Manuscript profile
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  7 - Physiological limiting factors of yield in different varieties of wheat, Triticum aestivum L., by changing source – sink relationships
  Ali Reza Goharbari davod Eradatmand Asli mojtaba Usefirad
      In order to determine the physiological limiting factors of yield in different varieties of wheat, Triticum aestivum L., an experiment was conducted as split plot in a randomized complete block design with three replications in research farm of Islami More

      In order to determine the physiological limiting factors of yield in different varieties of wheat, Triticum aestivum L., an experiment was conducted as split plot in a randomized complete block design with three replications in research farm of Islamic Azad university, Saveh branch in 2006-2007. Two large grain, Mahdavi, and small grain, Falat, wheat varieties were the main factors and removing flag leaf blade, removing three upper leaves, thinning of 50 percent of plants, removing of flag leaf blade and thinning of 50 percent of plants, removing of three upper leaves and thinning of 50 percent of plants and a control were considered as sub factors. The analysis of data showed that thinning of 50 percent of plants increased grain dry matter significantly in both cultivars. Removal of leaves decreased grain dry matter in Mahdavi cultivar more than Falat. Results showed positive reaction of small grain cultivar than large grain one in case of source  limitation. Manuscript profile