List of Articles مصرف نیتروژن

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  1 - Optimal nitrogen fertilizer consumption under sprinkler irrigation system in different seeding density and wheat cultivars in Karaj
  Ghasem Zarei Hamidreza Salemi Hamidreza ُSharifi
  The large area of wheat cultivation in Iran is located in arid and semi-arid regions and due to water shortage in end growing stage, there is competition between wheat and other crops for water allocation. In these conditions, using suitable seeding density and modern i More

  The large area of wheat cultivation in Iran is located in arid and semi-arid regions and due to water shortage in end growing stage, there is competition between wheat and other crops for water allocation. In these conditions, using suitable seeding density and modern irrigation systems for yield increasing is important. Although Nitrogen is the most important element for quantity and quality of wheat, but over using of Nitrogen base fertilizers causes leaching, decreasing fertilizers use efficiency and groundwater contamination. This research was conducted during two years with Split Factorial Design experiment. The treatments of this experiment were: Three fertilizers application methods (conventional fertilizers application with full recommended amount, fertigation method with sprinkler irrigation and full recommended amount, and fertigation method with sprinkler irrigation and 70% nutrition recommended), three wheat variety (Pishtaz, Shiraz, and Bahar) and three plant density (300, 400, and 500 seed in each square meter). In this study the amount of water use, fertilizer requirement in case of fertigation, suitable density and variety of wheat under these conditions (sprinkler irrigation and fertigation) were determined and recommended for the region. Statictical test was used for identifying of data variation uniformity. Since the variation uniformity hypothises verified, the combine analysis of data was possible. Therefore, combine statistical analysis for two year were used. Maximum grin yield 6065, 5786 and 5943 kg/h were belonging to Pishtaz, fertigation method with sprinkler irrigation and full recommended amount and 400 seed density per square meter, respectively. Minimum grin yield 5517, 5708 and 5576 kg/h were belonging to Shiraz, fertigation method with sprinkler irrigation and 70% nutrition recommended fertigation and 500 seed density per square meter, respectively. Mean intraction effect comparison between fertigation methods, varieties and seed densities showed that maximum grin yield (6307 kg/h) was belonging to Pishtaz, fertigation method with sprinkler irrigation and full recommended amount fertigation and 400 seed density per square meter. However, minimum grin yield (5359 kg/h) was belonging to Shiraz, fertigation method with sprinkler irrigation and 70% nutrition recommended fertigation and 500 seed density per square meter. The most protein percentage were belonging to Shiraz variey, fertigation method with sprinkler irrigation and full recommended amount fertigation and 300 seed density per square meter. Also the leats protein percentage were belonging to Bahar variey, fertigation method with sprinkler irrigation and 70% nutrition recommended and 500 seed density per square meter. Maximum grin yield (5786 kg/h) and protein (20.8%) was belonging to fertigation method with sprinkler irrigation and full recommended amount, respectively. The amount of produced grin per appllied one kg Urea were 15.4, 15.5, and 22.8 kg in three fertilizer treatments, respectively. Therefore, the Nitrogen use efficiency in fertigation with 70% nutrition recommended (fertigation method with sprinkler irrigation and 70% nutrition recommended) was high. Results showed that the fertigation method with sprinkler irrigation and 70% nutrition recommended, Pishtaz variety and 400 seed density per square meter were suitable treatments in this experiment. Manuscript profile
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  2 - Evaluation of yield, water use efficiency and Nitrogen efficiency in corn cultivation in Khuzestan province
  maryam kazemizadeh abdorahim hooshmand abdali naseri mona golabi muosa meskarbashee
  Water and nitrogen are the main factors limiting the maximum yield Achievement. Application of nitrogen fertilizer has great impact to increasing agricultural production. On the other hand, the high use of these fertilizers is due to the low efficiency of these fertiliz More

  Water and nitrogen are the main factors limiting the maximum yield Achievement. Application of nitrogen fertilizer has great impact to increasing agricultural production. On the other hand, the high use of these fertilizers is due to the low efficiency of these fertilizers. This research was conducted in response to the challenges of water scarcity and inappropriate management of nitrogen utilization. To quantitate the reaction of the plant and calculate the water and fertilizer efficiency, two irrigation levels, full irrigation (I1) and deficit irrigation equal 30% (I2) as the first factor and two nitrogen levels of 200 (N1) and 160 (N2) kg per hectare, it was considered as a second factor. Experiments were carried out as field treatments and in lysimeters as a factorial in a completely randomized block design with three replications. The cultivars used were maize hybrid 611 and 704 mediator SC, which were cultivated in two seasons of spring and autumn, respectively. Based on the results of this study, leaf area index with higher nitrogen application in the same moisture conditions is increased. Nitrogen increase, while that enough water is available to the plant, increases the weight of 1000 seeds, grain yield, biological yield and harvest index. Optimum use of water and nitrogen fertilizer increases grain yield and therefore increases water use efficiency. With increasing nitrogen content, nitrogen use efficiency decreases in corn cultivation. Under stress conditions, with increasing nitrogen consumption, fertilizer N-recovery efficiency is also reduced by decreasing the absorption of this element by the plant. The economic and biological efficiency of water use in autumn cultivation was more than spring cultivation. Low spring yield and high rainfall during autumn crop period were due to the efficiency and more productivity of water use in autumn cropping. In Khuzestan weather conditions, the use of early cultivars is recommended instead of the mediator for spring crop due to coincide the pollination time with intense heat. Manuscript profile
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  3 - Evaluation Nitrogen and Radiation Use Efficiency of Wheat (Triticum aestivum) under Irrigation Levels
  A. Ghanbari B. Fakheri E. Amiri A. Tavassoli
  Water and nitrogen are among the most important limiting factors controlling yield in crops. With due attention to importance this subject, in wheat a split plot experiment was carried out in the field, using randomized complete block design with three replications unde More

  Water and nitrogen are among the most important limiting factors controlling yield in crops. With due attention to importance this subject, in wheat a split plot experiment was carried out in the field, using randomized complete block design with three replications under different irrigation and nitrogen levels during the cropping season of 2009-10 in Shirvan region. The experimental treatments consisted of four levels of irrigation, I1= optimum irrigation (field capacity, FC), I2= Irrigation at 80% FC, I3= Irrigation at 60% FC and I4= without irrigation which were assign to main-plots, and four levels of nitrogen fertilizers, namely, N1= 0, N2= 100, N3= 175 and N4= 250 kg N/ha to sub-plots. The results of experiment showed that the highest amount of seed yield, biological yield, leaf area index during different growth stages, radiation use efficiency and nitrogen content in whole wheat and seed obtained from treatment of optimum irrigation (I1) and applications of highest nitrogen fertilizer level (N4), but there wasn’t significant different between this treatment with treatment of optimum irrigation and consumption of 175 kg N/ha (I1N3). The lowest values were obtained from treatment of no irrigation and nitrogen (I4N1). For nitrogen use efficiency there was two different conditions. In the first condition, nitrogen use efficiency increased under optimum irrigation (I1) and irrigation at 80% FC (I2) with increasing nitrogen level from N1 to N4. In the second condition, nitrogen use efficiency decreased under irrigation of 60% FC (I3) and without irrigation (I4) with increasing nitrogen level from N1 to N4. Generally, it can be concluded that to obtain the highest yield in region, optimum irrigation is necessary. To obtain highest nitrogen fertilizer consumption and seed yield 250 kg N/ha would be required however there wasn’t significant difference between 250 an 175 kg N/ha applications. Manuscript profile
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  4 - Effect of Nitrogen Fertilizer Rates and Its Split Application on Yield and Nitrogen Use Efficiency of Quinoa (Chenopodium quinoa willd.) Cultivars
  Mahsa Mansouri Mojtaba Alavi Fazel Abdolali Gilani Shahram Lak Mani Mojdam
  10.30495/jcep.2021.687066
  To evaluate the effect of nitrogen rate and its split application on seed yield and nitrogrn use efficiency (NUE) of quinoa cultivars, experiments were performed during 2018-2019 and 2019-2020 growing seasons as factor split plot based on randomized complete block desig More

  To evaluate the effect of nitrogen rate and its split application on seed yield and nitrogrn use efficiency (NUE) of quinoa cultivars, experiments were performed during 2018-2019 and 2019-2020 growing seasons as factor split plot based on randomized complete block design with three repetitions at Khuzestan Agricultural and Natural Resources Research and Training Center Station. Experiment treatments were nitrogen fertilizer (0, 100, 200 and 300 kg.ha-1) as the main factor and four levels of split nitrogen fertilizer applications (50% basic + 50% six-leaf, 50% basic + 25% Six-leaf percentage + 25% mid-flowering, 25% basic + 50% six-leaf + 25% mid-flowering and 25% basic + 25% six-leaf + 50% mid-flowering) and three cultivars of quinoa (Gizat, Q26, Titicaca) as sub-plot. The results showed, SPAD, height plant, number of plant branches, number of panicules per area unit and seeds per panicule as influenced by nitrogen content × split × cultivare, interaction. The years× nitrogen rate×split application× cultivar intractions were significant on plant height, 1000 seed weight, seed yield, biological yields, harvest index and NUE. The highest seed yield under all different levels of nitrogen was related to cultivar Q26, in both years by the use of 200 kg of nitrogen, the highest seed yield in the first year belonged to at 25% base application + 50% at six-leaf stage+ 25% at mid-flowering stage and in the second year, to at 50% as base application+ 25% at six-leaf stage+ 25% mid-flowering stage. Highest NUE belonged to Gizal (52.8 g.kg-1) and Q26 (51.8 g.kg-1) cultvars from 200 kg.ha-1 nitrogen by split applications of 25% base + 25% at six-leaf stage+ 50% at mid-flowering stage, while in second year from 100 kg.ha-1 nitrogen. In general, climatic conditions and split application of fertilizer were effective roles in increasing the efficiency of nitrogen consumption. Thus by the use of proper management seed yield can be increased and the risk of its production decreased. Manuscript profile
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  5 - Response of Safflower (Carthamus tinctorius L.) Agronomic Characteristics to Time, Rate and Methods of Nitrogen Applications
  MOHAMMAD MIRZAKHANI
  To investigate the response of safflower agronomic characteristics to time, rate and method of nitrogen applications, an experiment was carried out at the research Field of Payaam Nour Arak University in Markazi province during 2011. A factorial arrangement of treatment More

  To investigate the response of safflower agronomic characteristics to time, rate and method of nitrogen applications, an experiment was carried out at the research Field of Payaam Nour Arak University in Markazi province during 2011. A factorial arrangement of treatment in a randomized complete block design with three replications was used. Time of nitrogen treatment was with three levels (half in planting date + half in rosette stage), (half in rosette stage + half in stem elongation) and (half in stem elongation + half in boll forming stage), urea application was two levels (150 and 300 kg.ha-1) and method of application was with three levels (mixed with soil, used in irrigation water and foliar application). Each plot consisted of 4 rows, 5 m long with 50 cm between rows and 5 cm between plants on the rows. Results indicated that the effect of application time on the characteristics like: height of branch, number of sub-branches, number of seeds per m-2, number of seeds per plant, biological yield of bolls, seed yield of bolls, harvest index of bolls were significant. The effect of nitrogen treatment rates on branch height, number of sub-branches, number of seeds per m-2, number of seeds per plant, biological yield of boll, harvest index of boll, and nitrogen use efficiency were also significant. Mean nitrogen use efficiencies for foliar application was 63.27% and for soil mixed application was 6.86%. Thus, it seems that foliar application of urea not only decreases environmental but also increases nitrogen use efficiency. Manuscript profile
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  6 - تأثیر دو منبع تانن بر عملکرد، مصرف نیتروژن و راندمان سنتز نیتروژن میکروبی در بزهای شیری
  ا. مختارپور ع.ع. ناصریان ف. پورملایی س. صفا
  هدف از این مطالعه ارزیابی اثرات اسید تانیک (TA) و عصاره حاوی تانن محصولات فرعی پسته (PBE) بر مصرف نیتروژن و راندمان سنتز نیتروژن میکروبی در بزهای شیری سانن بود. در این مطالعه از 6 رأس بز شیری چند شکم زایش در اواسط شیردهی در قالب یک طرح چرخشی با 3 دوره استفاده شد. محلول More

  هدف از این مطالعه ارزیابی اثرات اسید تانیک (TA) و عصاره حاوی تانن محصولات فرعی پسته (PBE) بر مصرف نیتروژن و راندمان سنتز نیتروژن میکروبی در بزهای شیری سانن بود. در این مطالعه از 6 رأس بز شیری چند شکم زایش در اواسط شیردهی در قالب یک طرح چرخشی با 3 دوره استفاده شد. محلول TA و PBE در زمان سیلو کردن به یونجه تازه اضافه شد تا غلظت نهایی تانن حدود 1 درصد ماده خشک شود. تیمارها عبارت بودند از: 1) سیلاژ یونجه بدون عمل‌آوری (AS)، 2) سیلاژ یونجه عمل‌آوری شده با TA (AS+TA)، و 3) سیلاژ یونجه عمل‌آوری شده با PBE (AS+PBE). مصرف ماده خشک، ماده آلی و نیتروژن و همچنین تولید و ترکیبات شیر (به صورت درصد یا گرم در روز) تحت تأثیر اضافه کردن تانن قرار نگرفت. تغییر الگوی قابل ملاحظه‌ای در دفع نیتروژن از ادرار به مدفوع در بزهای تغذیه شده با جیره حاوی PBE در مقایسه با گروه شاهد مشاهده شد. دفع نیتروژن از ادرار دارای روند (10/0=P) رو به کاهش (4/17 در مقابل 2/19 گرم در روز) و دفع نیتروژن از مدفوع در بزهای تغذیه شده با AS + PBE نسبت به سیلاژ شاهد بیشتر (05/0P<) بود (6/14 در مقابل 6/12 گرم در روز). نیتروژن ابقا شده چه به صورت درصدی از نیتروژن مصرفی و چه به صورت گرم در روز، در بزهای تغذیه شده با AS + PBE نسبت به سیلاژ شاهد بیشتر بود (05/0P<). سنتز نیتروژن میکروبی تحت تأثیر اضاف کردن تانن قرار نگرفت. ولی، راندمان سنتز نیتروژن میکروبی در بزهای تغذیه شده با تانن نسبت به آنهایی که با سیلاژ شاهد تغذیه شده بودند دارای روند رو به کاهش بود (10/0=P). اگرچه، تانن‌های اضافه شده به سیلاژ یونجه ممکن است اثرات مفیدی بر مصرف نیتروژن و همچنین نیتروژن دفع شده به محیط زیست داشته باشند، ولی ممکن است با تخمیر شکمبه‌ای تداخل ایجاد کرده و منجر به کاهش راندمان سنتز نیتروژن میکروبی در بزها مخصوصاً آنهایی که با PBE تغذیه شدند، شود. Manuscript profile
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  7 - Investigating the environmental impacts for peanut production in Astaneh Ashrafieh based on nitrogen fertilizer consumption through Life Cycle Assessment (LCA)
  سید علی نورحسینی امین نیکخواه
  In this study, in order to determine the environmental impacts of peanut production in Astaneh Ashrafieh based on nitrogen fertilizer consumption a research was conducted using life cycle assessment methodology in 2015. A field experimental was performed with randomized More

  In this study, in order to determine the environmental impacts of peanut production in Astaneh Ashrafieh based on nitrogen fertilizer consumption a research was conducted using life cycle assessment methodology in 2015. A field experimental was performed with randomized complete block design in three levels of nitrogen consumption (0, 30 and 60 kgha-1) in three replications. These effects in six groups; the global warming, acidification, terrestrial eutrophication, the depletion of fossil resources, the depletion of potassium and the depletion of phosphate were investigated. Two functional units included one tonne of peanut and generation of 1000 MJ energy were considered to evaluate the environmental impacts. The results showed that the environmental index (Eco-indeX) with regard to global warming, acidification, terrestrial eutrophication for treatment of control, 30 and 60 kg of nitrogen per hectare were 0.18, 0.52 and 0.66, respectively. Also, resources depletion index (RDI) for one-ton production of peanut with regard to depletion of fossil resources, the depletion of potassium and the depletion of phosphate for treatment of control, 30 and 60 kg of nitrogen per hectare were determined to be 0.80, 0.53 and 0.30, respectively. Overall, the Eco-Index impact categories (global warming, acidification, terrestrial eutrophication) showed the greatest negative effects on the environment for the highest level of nitrogen consumption. Manuscript profile
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  8 - Effect of integrate nutrition of chemical and animal manures on yield and yield components of spring safflower
  M. Ghanbari M. Mirzakhani A. Hashemi
  Increasing overuse of chemical fertilizers has been causes environmental pollution, degradation of soil and crops. In order to study the effect of integrated application of chemical and animal manures on yield and yield components of spring safflower, the study was carr More

  Increasing overuse of chemical fertilizers has been causes environmental pollution, degradation of soil and crops. In order to study the effect of integrated application of chemical and animal manures on yield and yield components of spring safflower, the study was carried out in Fatholmobin field of Kashan in 2014. A factorial arrangement of treatment in a randomized complete block design with three replications was used. Chemical fertilizer treatment (Control, 50 kg ha-1 of nitrogen + 25 kg ha-1 of P2O5, 100 kg ha-1 of nitrogen + 50 kg ha-1 of P2O5, 150 kg ha-1 of nitrogen + 75 kg ha-1 of P2O5) and animal manure treatment (Control, 20 ton ha-1, 40 ton ha-1), were assigned in plots. Stem height, number of branches, number of bolls per plant, grains per boll, boll harvest index, 1000 grain weight, grain yield, protein content, phosphorus absorption, nitrogen agronomy efficiency and nitrogen use efficiency were determined. Results indicated that the interaction effects between chemical fertilizer and animal manure on 1000 grain weight, grain yield, protein content, phosphorus absorption, nitrogen agronomy efficiency and nitrogen use efficiency were significant. The highest and lowest of grain yield 1031 and 268 kg ha-1 were obtained in 150 kg ha-1 of nitrogen + 75 kg ha-1 of P2O5 + 20 t ha-1 of animal manure and without application of the chemical and animal manure, respectively. Manuscript profile
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  9 - Evaluation of Integrated System management in Organic, Biological and Chemical Inputs on Yield Characteristics and nitrogen Efficiency of German Chamomile
  عباس ملکی فاطمه جهانی علیرضا پازکی
  In order to study the effect of chemical, organic and biological fertilizer on yield and its components of chamomile, a split split plot experiment carried out in a randomized complete block design in three replications. This research had 3 factors include of nitrogen f More

  In order to study the effect of chemical, organic and biological fertilizer on yield and its components of chamomile, a split split plot experiment carried out in a randomized complete block design in three replications. This research had 3 factors include of nitrogen fertilizer at four levels (0, 50, 100 and 200 kg per ha)in main plits, manure at two levels (with 30 tons per hectare use and non-use) in subplots and nitroxin as biological fertilizer in two levels (inoculated and non-inoculated seed) as sub-sub plot were allocated in experimental plots. The results showed that the treated manure, at the rate of 66 percent and the lowest essential oils in the treatment of manure at the rate of 50.8 per cent, respectively. However, in observing inoculation with nitroxin fertilizer, essential oils in the treatment of 64.6 percent and the lowest rate of inoculation was 52.2 percent. The results showed that the lowest nitrogen efficiency obtained in non-inoculated seed treatment and application of 200 kg nitrogen fertilizer about of 1.7 was and the most efficient use of nitrogen was obtained in 50 kg of nitrogen and inoculated seeds about of 5.4. Among the examined three types of fertilizer, bio-fertilizer of nitroxin had a greater effect on traits. Integrated application of organic, biologic and chemical fertilizer to achieve of sustainable agriculture causes to high yield quality and ecosystems protection. Manuscript profile
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  10 - Effects of nitrogen and potassium levels on some qountitative and qualitative traits and agronomical fertilizer use efficiency in lentil cultivation
  Roghayyeh Zabihi-e-Mahmoodabad Mohammah Hassanzadeh
  In order to investigate of the effects of nitrogen and potassium levels on nitrogen and potassium uptake, agronomical use efficiency and protein content of lentil, a field factorial experiment design in the base of complete random block in three replications was carried More

  In order to investigate of the effects of nitrogen and potassium levels on nitrogen and potassium uptake, agronomical use efficiency and protein content of lentil, a field factorial experiment design in the base of complete random block in three replications was carried out in the research field of Islamic Azad University of Ardebil branch during 2015-2016. Factors include potassium fertilizer rate with three levels (0, 35 and 70 kgK/ha) the form of potassium sulphate source and nitrogen fertilizer rate with three levels (0, 30 and 60 kgN/ha) the form of granulation and the cultivated variety was the native variety. The results showed that in the all of traits, (Except of agronomical nitrogen and potassium used efficiency) increasing of nitrogen and potassium fertilizer rate increased the studied traits. The main effects of each fertilizers, cased to increase of yield and yield components and precentag and the amount absourbtion of potassum and nitrogen fertilizer traits, so that the highest amount of these traits was obtained in 70 kgK/ha potassium fertilizer and 60 kgN/ha nitrogen fertilizer. The interaction effects between potassium and nitrogen fertilizer on grain yield, agronomic efficiency of K fertilizer, protein yield of grain and grain nitrogen uptake were significant. The results of this study showed that simultaneous use of nitrogen and potassium fertilizer was positive reactions of lentil to fertilizers and increased seed yield.Totally Co-application of these two fertilizers to increase the quantity and quality of this plant under this condition, is recommended. Manuscript profile
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  11 - Effect of nitroxin, nitrogen and manure application on yield, nitrogen use efficiency and Some crop characteristics in sweet corn
  M. Sharifi M. Mirzakhani N. A. Sajedi
        In order to effect nitroxin levels of nitrogen and manure application on nitrogen use efficiency and some quantitative traits in sweet corn varieties as Chase factorial experimental design based on randomized complete block with three repl More

        In order to effect nitroxin levels of nitrogen and manure application on nitrogen use efficiency and some quantitative traits in sweet corn varieties as Chase factorial experimental design based on randomized complete block with three replications in agricultural research farm in 2010, Islamic Azad University Arak was performed. Factors studied include two levels nitroxin inoculated and non inoculated with the seed, pure nitrogen at three levels 0, 50 and 100 kg ha-1 and manure at three levels 10, 20 and 30 tons ha-1 were. The results showed nitroxin on the characteristics of grain per ear, ear away from the field level, cob weight, grain yield and nitrogen use efficiency had the effect, so that the increase of grain per ear, cob weight, grain yield per hectare and nitrogen use efficiency was. Animal manure also on the characteristics of grain per ear, ear away from the field level, ear leaf area, grain hectolitre weight, grain yield per hectare and nitrogen use efficiency had the effect, so that reduces the nitrogen use efficiency and grain per ear was. Nitrogen effects on grain protein, cob weight, ear leaf area, grain yield and nitrogen use efficiency was significantly increased grain protein and grain yield per hectare was. Excess nitrogen and manure significantly reduced nitrogen use efficiency was also inoculated seed nitroxin positive effect on nitrogen use efficiency found. Manuscript profile
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  12 - Effect of biofertilizer and nitrogen on nitrogen use efficiency and harvest index of two winter wheat (Triticum aestivum L.) cultivars
  M. Najari Sadeghi B. Mirshekari S. Baser Koochebagh S. Allahyari
       In order to study effects of biofertilizer and nitrogen on nitrogen use efficiency and harvest index of wheat (Triticum aestivum L.) an experiment was conducted with nitrogen rate (0, 33, 67, 100 kg/ha urea), seed biofertilization with nitragin More

       In order to study effects of biofertilizer and nitrogen on nitrogen use efficiency and harvest index of wheat (Triticum aestivum L.) an experiment was conducted with nitrogen rate (0, 33, 67, 100 kg/ha urea), seed biofertilization with nitragin and wheat cultivars (Alvand and MV17). Results showed that with increasing of urea application fertile tillers number per plant improved. When biofertilized seeds were planted, grain yield increased from 6017 kg/ha in control to 6591 kg/ha in application of 33 kg/ha urea and 6954 kg/ha in 67 kg/ha urea in Alvand, and from 3547 kg/ha in control to 4428 kg/ha in application of 33 kg/ha urea and 4724 kg/ha in 67 kg/ha urea in MV17. Seed biofertilization with nitragin increased harvest index of crop up to 2.3%. In biofertilized treatments, when wheat plants were fertilized with lower dose of urea, grain yield improved in both cultivars. With increasing of urea rate from 67 to 100 kg/ha the yield reduced. In non-biofertilized plants grain yield in those plots fertilized with full dose of urea was the highest. In experiment environmental condition with wheat seed biofertilization before planting we can improve grain yield and reduce urea application up to 33% of recommended dose. Manuscript profile
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  13 - Effect of nitrogen fertilizer levels and plant density on seeds quantity and quality of wheat
  Javad Hamzei mohsen Seyedi afshar Azadbakht Ayob Fesahat
  In order to evaluate the effect of nitrogen fertilizer and plant density on wheat yield and yield component an experiment was done as factorial bases on randomized complete block design with three replications at the Agricultural Research Station, Faculty of Agriculture More

  In order to evaluate the effect of nitrogen fertilizer and plant density on wheat yield and yield component an experiment was done as factorial bases on randomized complete block design with three replications at the Agricultural Research Station, Faculty of Agriculture, University of Bu-Ali Sina, during 2011-12 growing season. Experimental factors were: fertilizer levels (0, 40, 80, 120 and 160 kg N ha-1) and plant density (150, 300 and 450 plant m2). According to the data analysis, effect of nitrogen and plant density on all traits except harvest index were significant. Means comparison showed by increasing at N fertilizer; plant height, grain number per spike, 1000-seeds weight, biological yield, chlorophyll index and protein percentage were increased. But, by increasing at plant density; grain number per spike, 1000-seeds weight, chlorophyll index and protein percentage were decreased. The traits such as spike number per m2, grain yield and protein yield were affected by fertilizer × density interaction, significantly. The highest grain yield and protein yield (500 and 68.50 g m-2, respectively) were achieved at 160 kg N fertilizer × 300 plant per m2 treatment. So, pay attention to the results of present research, it seems that density of 300 plants with consumption of 120 kg N ha-1 is suitable for producing maximum grain and protein yields of wheat. Manuscript profile
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  14 - Effect of Tillage Systems and Nitrogen Fertilizer on Agro Physiological Characteristics of Corn
  Reza Imani Morteza Samdaliri امیر عباس موسوی
  To investigate the effect of tillage systems and nitrogen fertilizer on corn characteristics, in 2016 and 2017, a research field was conducted in the research farm of Islamic Azad University Chalous Branch during two cropping years.The experiment was performed as a spli More

  To investigate the effect of tillage systems and nitrogen fertilizer on corn characteristics, in 2016 and 2017, a research field was conducted in the research farm of Islamic Azad University Chalous Branch during two cropping years.The experiment was performed as a split-plot in a randomized complete block design with three replications. Experimental factors include tillage at three levels (no-tillage, conservation tillage and conventional tillage) in the main plot and nitrogen fertilizer sources at four levels, including non-application of zero, 33, 66,and 100% of the recommended amount of nitrogen fertilizer based on the test. The soil was on a subplot.Comparing the average effect of tillage showed that the highest grain yield was obtained in conservation tillage treatment at the rate of 10247 kg/ha-1. Comparison of tillage's average effect showed that the highest biological product was received in conservation tillage at the rate of 15754 kg/ha-1. Comparison of the average interaction of the year in tillage also showed that the highest NUPE was observed in the conservation tillage treatment in the second year at the rate of 0.90 kg.kg-1, which showed an increase of 47% compared to the treatment no tillage in the first year. NUPE in tillage treatments increased in the second year compared to the first year, which was higher in conservation and non-tillage tillage treatments. Comparison of the average treatment of nitrogen fertilizer showed that the highest grain nitrogen was obtained in the treatment of 100% nitrogen fertilizer at the rate of 1.98%, which showed an increase of 25.7% compared to the control treatment.In general, the results of this study showed that by applying conservation tillage methods, the least damage can be done to the soil structure, and through this, maximum yield and efficiency can be achieved in the corn plant. Therefore, according to grain yield, the most appropriate treatment for the study area is the use of conservation tillage in the case of fertilizer application of 66% nitrogen. Manuscript profile