نتایج جستجو برای: concentration of nitrogen

تعداد نتایج: 21187520  

Abstract In order to assess reduced nitrogen level impacts on butterhead lettuce (Lacttuca sativa L.) growth and yield, an experiment was done from May to August 2015 in research greenhouse of Shahrekord University. The experiment was conducted through randomized completed design with three replications and four treatments. The lettuce plants were grown in floating system using 60, 80, 100 a...

فرزانه, نسرین, هاشمی‌مجد, کاظم, گلچین, احمد ,

A completely randomized factorial experiment was set up with 16 treatments and three replicates to study the effect of nitrogen and boron on yield, shoot and root dry weights and leaf concentration of nutrient elements in hydroponically grown tomato in greenhouse of Agricultural College of Zanjan University in 2008. In this experiment, tomato seed of Rio Grande Ug was selected and simple and i...

Journal: :علوم گیاهان زراعی ایران 0
زینب بیات دانشجوی کارشناسی ارشد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران علی احمدی دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران منیژه سبکدست مربی پردیس کشاورزی و منابع طبیعی دانشگاه تهران

the aim of this study was to investigate the genotype effect on nitrogen remobilization and its relationship with yield and grain protein concentration in genotypes of wheat during grain filling. twelve wheat cultivars different in origin and varying with grain yield and grain protein percentage were selected. a randomized complete block design was used. plants were harvested at anthesis and ma...

Deficiency of nitrogen may lead to decrease in yield and yield potential of crop plants. An experiment was done under glasshouse conditions in order to investigate nitrogen levels and salicylic acid interaction on some physiologic traits of borage (Borago officinials L.). In this experiment various levels of nitrogen (including; 27.5, 55, 110, 220 and 330 mg/L from ammonium nitrate) and salicyl...

Journal: :پژوهش های تولید گیاهی 0
رضا دیهیم فرد هیات علمی شهرام نظری دانشجوی دکتری

background and objectives: over the last two decades, a large number of researches have been conducted regarding the importance of nitrogen in sugar beet. this indicate that there were needs to investigate more on nitrogen management to achive higher production and quality because less nitrogen application result in reducing yield and high nitrogen application would increase production costs an...

Journal: :پژوهش های زراعی ایران 0
حسین سعیدی گراغانی رستم یزدانی بیوکی ندا سعیدی گراغانی حمید سودایی زاده

parsley has a very high nutritional value, containing a, b and c vitamins and mineral nutrients. in order to investigation of the effect of different nitrogen sources on parsley an experiment conducted in a factorial combination of three nitrogen forms (calcium nitrate, ammonium sulphate and urea) and four nitrogen levels (0, 100, 125, 150 kg ha-1) by using a factorial experiment based on rando...

Journal: :مدیریت خاک و تولید پایدار 0
مریم کاشی ساز دانشگاه شهید چمران اهواز عبدالامیر معزی عضو هیئت علمی دانشگاه شهید چمران اهواز غلامعباس صیاد عضو هیئت علمی دانشگاه شهید چمران اهواز غلامعباس لطفعلی آینه عضو هیات علمی مرکز تحقیقات کشاورزی و منابع طبیعی خوزستان

abstractabout 30 to 50 percent of applied nitrogen fertilizers leached from soil to ground waters which can causes environment contamination and various human health problems. the rotation type can affect nitrogen mobility rate, so it is necessary to study effect of rotation type in on nitrogen movement. in order to evaluate effects of three main rotations in khuzestan province on inorganic for...

Journal: :iranian journal of toxicology 0
سارا موسی زاده sara mousazadeh department of pharmacology, pharmacy school, ahwaz, jundishapor university of medical science, ahwaz, iran.

background: nitrogen oxides occur in the atmosphere in six forms of namely: n2o , no , no2 , n2o3, n2o4 and n2o5 .among these oxides no2 is the most important air pollutant because of its relatively high toxicity and its ubiquity in ambient air. in this research griess-saltzman method was utilized for determination of nitric oxide and nitrogen dioxide in the atmosphere of different laboratories...

Relationship of nitrogen (N) supply to nitrogen remobilization and leaf and grain P, K, and N status of wheat lacks clarity. The present pot experiment was conducted to evaluate nitrogen remobilization and leaf and grain P, K, and N status of ancient wheats of different ploidy levels in response to nitrogen. The experiment was carried out in Fall 2017-Spring 2018 at the Isfahan University of Te...

تقوی شهری, سید محمود, حاجیزاده, یعقوب, حسن‌زاده, اکبر, مغزی نجف آبادی, عظیمه, مهکی, بهزاد,

Background and Objectives: Annually about 7 million premature deaths occur due to air pollution in the world. Nitrogen oxides are among major air pollutants. Although many foreign exposure assessment studies have been carried out, Iranian studies are limited to primary analyses. Hence, in this research, we studied spatial variation of nitrogen oxides using spatiotemporal modeling in Tehran 2014...

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