نتایج جستجو برای: nitrate nitrogen content

تعداد نتایج: 546641  

Journal: :Journal of agricultural and food chemistry 2006
Nacer Bellaloui Krishna N Reddy Robert M Zablotowicz Alemu Mengistu

Nontarget injury from glyphosate drift is a concern among growers using non-glyphosate-resistant (non-GR) cultivars. The effects of glyphosate drift on nitrate assimilation and nitrogen fixation potential, nodule mass, and yield of non-GR soybean were assessed in a field trial at Stoneville, MS. A non-GR soybean cultivar 'Delta Pine 4748S' was treated with glyphosate at 12.5% of use rate of 0.8...

J. Zhao W. Duan Y. Shi, Zh. Yu

A field experiment was conducted to examine the effects of different depths ofnitrogen (N) fertiliser placements on N accumulation, remobilisation and NO3−-Ncontent in soil of rainfed wheat. Nitrogen was applied on the surface (D1) and inthe 10 cm (D2), 20 cm (D3) and 30 cm (D4) soil layers from 2010 to 2012.Compared with D1 and D2, D3 and D4 treatments obtained significant higher Ndistribution...

بای بوردی, احمد , طباطبایی‌, سید جلال ,

In order to investigate the effect of different ratios of ammonium: nitrate on the photosynthesis and fatty acid composition in canola (Brassica napus L.) under different levels of salinity, an experiment was conducted as a factorial based on complete randomize design at Agricultural Research Center in East Azerbaijan in 2010. The first factor was different ratios of nitrogen sources to ammoniu...

2013
H. C. KAYMAK

KAYMAK, H. C., 2013. Effect of nitrogen forms on growth, yield and nitrate accumulation of cultivated purslane (portulaca oleracea l.). Bulg. J. Agric. Sci., 19: 444-449 The present investigation was carried out to determine not only the most appropriate nitrogen form but also the effect of these forms on growth, yield, element content and nitrate accumulation of cultivated purslane (portulaca ...

Journal: :تولید گیاهان زراعی 0

in order to evaluate plant density and different nitrogen levels on protein percent, yield and nitrate accumulation in potato tuber cv. agria, a factorial experiment based on randomized complete block design with three replications was conducted in ardabil in 2006. factors included nitrogen levels: 0, 80, 160 and 200 kg ha-1 net nitrogen and plant densities: 5.5, 7.5 and 11 plant m-2. results s...

2015
Lutz Breuer Noreen Hiery Philipp Kraft Martin Bach Alice H. Aubert Hans-Georg Frede

We organized a crowdsourcing experiment in the form of a snapshot sampling campaign to assess the spatial distribution of nitrogen solutes, namely, nitrate, ammonium and dissolved organic nitrogen (DON), in German surface waters. In particular, we investigated (i) whether crowdsourcing is a reasonable sampling method in hydrology and (ii) what the effects of population density, soil humus conte...

Bazargan, Kambiz, Beheshti, Mehdi, Malekzadeh, Elaheh, Shahbazi, Karim,

Background: Nitrate is one of the most important pollutants that is accumulated mainly due to unbalanced fertilizer use and excessive use of nitrogen fertilizers in plant organs. Most of the nitrate in our body comes from vegetables. In Iran, tomatoes and cucumbers are consumed vegetables in the food basket of people. Therefore, the study of nitrate pollution in these products and the identific...

Journal: :علوم باغبانی 0
مریم حقیقی محسن کافی

abstract lettuce is one of the best accumulators of heavy metals and nitrate between leafy vegetables. through this research, it was tried to decreased cadmium absorption with humic acid (ha) and studies the effect of ha on the accumulation and metabolism of nitrate. plants were grown in the peat/perlite and irrigated with hoagland solution with addition of cadmium (2 and 4 mg l -1) and ha (100...

2007
Adriel Ferreira da Fonseca Uwe Herpin Carlos Tadeu dos Santos Dias José Melfi Luiz de Queiroz

In this study, an experiment under controlled conditions was carried out to determine the effects of secondarytreated sewage effluent (STSE) application on soil nitrogen concentrations (mineral and total), total carbon and soil pH. The soil and STSE used were collected at Lins, São Paulo State, Brazil. A completely randomized design was used, in completed factorial 4x11 (weekly application rate...

2007
Pamela A. Matson Peter M. Vitousek Maria Julia Mazzarino

We measured nitrogen transformations and loss following forest clearing in a relatively fertile tropical forest site. Nitrogen mineralization, nitrification, and amounts of ammonium and nitrate increased substantially in surface soils during the 6 mo following burning, then returned to background levels. The nitrogen content of microbial biomass declined to half its original value 6 mo after cl...

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