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Letteratura scientifica selezionata sul tema "Nitrogen"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 luglio 2024

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Articoli di riviste sul tema "Nitrogen"

1

Takahashi, Mikio, e Yatsuka Saijo. "Nitrogen metabolism in Lake Kizaki, Japan V. The role of nitrogen fixation in nitrogen requirement of phytoplankton". Archiv für Hydrobiologie 112, n. 1 (24 marzo 1988): 43–54. http://dx.doi.org/10.1127/archiv-hydrobiol/112/1988/43.

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2

Kubát, J., J. Klír e D. Pova. "The dry nitrogen yields nitrogen uptake, and the efficacy on nitrogen fertilisation in long-term experiment in Prague". Plant, Soil and Environment 49, No. 8 (10 dicembre 2011): 337–45. http://dx.doi.org/10.17221/4134-pse.

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Long-term field experiments conducted under different soil and climate conditions and their databases provide invaluable information and are indispensable means in the study of the productivity and sustainability of the soil management systems. We evaluated the results of the dry matter yields of the main products obtained with four variants of organic and mineral fertilisation in three long-term field experiments established in 1955. The experiments differed in the cultivated crops. The period of evaluation was 12 and 16 years (1985–2000), respectively. The productivity of nine-year crop rotation was lower with the fertilised variants than that with the alternative growing of spring wheat and sugar beets. The dry matter yields on the Nil variants, however, were higher in the crop rotation than in the alternate sugar beet and spring wheat growing, apparently due to the symbiotic nitrogen fixation. The dry matter yields of sugar beet and mainly of spring wheat declined in almost all variants of fertilisation in the alternate sugar beet and spring wheat growing, over the evaluated time period. In spite of the relatively high dry matter production, the declining yields indicated a lower sustainability of the alternate cropping system. Both organic and mineral fertilisation increased the production of the cultivated crops. The differences in the average dry matter yields were statistically significant. Both organic and mineral fertilisation enhanced significantly the N-uptake by the cultivated crops. The effectivity of nitrogen input was the highest with the alternate cropping of sugar beet and spring wheat indicating that it was more demanding for the external N-input and thus less sustainable than nine-year crop rotation.

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3

Iduna, Arduini, Cardelli Roberto e Pana Silvia. "Biosolids affect the growth, nitrogen accumulation and nitrogen leaching of barley". Plant, Soil and Environment 64, No. 3 (21 marzo 2018): 95–101. http://dx.doi.org/10.17221/745/2017-pse.

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Biosolids are organic fertilisers derived from treated and stabilised sewage sludge that increase soil fertility and supply nitrogen to crops over a long period, but can also increase the risk of nitrogen (N) leaching. In this work, spring barley was grown in lysimeters filled with soil amended with biosolids, and with and without mineral N fertilisation. Biomass and the N concentration and content of shoots and roots were determined at flowering and maturity, and the N remobilization was calculated during grain filling. Drainage water was collected and analysed for N leaching. Biosolids increased soil porosity and soil nitrate, and positively affected the growth and N uptake of barley. Compared to mineral fertilisers, biosolids produced 18% higher vegetative biomass and 40% higher grain yield. During grain filling, both N uptake and N remobilization were higher with biosolids, which increased the grain N content by 32%. Nitrogen loss in leachates was 1.2% of plant uptake with mineral fertilisers and 1.7% with biosolids. Thus, soil fertilisation with biosolids greatly benefits spring barley, only slightly increasing N leaching.

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4

Löhr, Frank, e Heinz Rüterjans. "Detection of Nitrogen–NitrogenJ-Couplings in Proteins". Journal of Magnetic Resonance 132, n. 1 (maggio 1998): 130–37. http://dx.doi.org/10.1006/jmre.1998.1406.

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5

Plhák, F. "Nitrogen supply through transpiration mass flow can limit nitrogen nutrition of plants". Plant, Soil and Environment 49, No. 10 (10 dicembre 2011): 473–79. http://dx.doi.org/10.17221/4159-pse.

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Pea (Pisum sativum L.), sunflower (Helianthus annuus L.) and maize (Zea mays L.) plants were cultivated for 10 days in hydroponics at 1mM and 7mM nitrate or ammonium concentrations at regulated pH 6 and ambient CO2 level. Plant growth, content of total N and both ions in plant tissues, uptake of water and both N ions were evaluated, N uptake related to transpiration mass flow and to diffusion supply was calculated. Pea and sunflower preferred nitrate nutrition while maize plants used both N ions. The content of total N as well as of both N ions in plant tissues increased with N level with some exceptions. The uptake of both N ions related to transpiration mass flow was dependent on transpiration rate and N ion concentration. At a 1mM N concentration the uptake of N ions related to transpiration mass flow was low and reached in maize up to 16 times, in sunflower 11 times and in pea 2–3 times lower values in comparison with diffusion supply. At a 7mM N concentration N uptake in pea plants was totally supplied by transpiration mass flow, in sunflower plants the ratio of N supply related to transpiration mass flow amounted to 50% and in maize plants N supply through diffusion prevailed, amounting to 70–80%. These results explicate N starvation at low N supply that can intensify at elevated CO2 causing decreased stomatal diffusion.

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6

Meulenbelt, Jan. "Nitrogen and Nitrogen Oxides". Medicine 31, n. 10 (ottobre 2003): 64. http://dx.doi.org/10.1383/medc.31.10.64.27826.

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7

Meulenbelt, Jan. "Nitrogen and nitrogen oxides". Medicine 35, n. 12 (dicembre 2007): 638. http://dx.doi.org/10.1016/j.mpmed.2007.09.018.

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8

Meulenbelt, Jan. "Nitrogen and nitrogen oxides". Medicine 40, n. 3 (marzo 2012): 139. http://dx.doi.org/10.1016/j.mpmed.2011.12.020.

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9

Černý, J., J. Balík, D. Pavlíková, M. Zitková e K. Sýkora. "The influence of organic and mineral nitrogen fertilizers on microbial biomass nitrogen and extractable organic nitrogen in long-term experiments with maize". Plant, Soil and Environment 49, No. 12 (11 dicembre 2011): 560–64. http://dx.doi.org/10.17221/4194-pse.

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Microbial biomass nitrogen and extractable organic nitrogen in extractions by 0.05M K<sub>2</sub>SO<sub>4</sub> and 0.01M CaCl<sub>2</sub> were studied in a long-term experiment with successive growing of silage maize. The highest content of microbial biomass nitrogen was measured for manure treatment, by 38–133% higher than for the control. In treatments with applications of mineral nitrogen fertilizers microbial biomass N was lower on average by 22–30% against the control. Extractable organic nitrogen was also lower in treatments with mineral N fertilizers compared to the control: by 23% in ammonium sulphate treatment and by 29% in DAM. The highest content of extractable organic nitrogen was determined for manure treatment. There was a positive correlation (r = 0.44–0.9) between microbial biomass nitrogen and extractable organic nitrogen in the extractions by 0.01M CaCl<sub>2</sub> and 0.05M K<sub>2</sub>SO<sub>4</sub>.

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10

Zorc, B. "Automatic TIG welding of austenitic stainless steels in nitrogen and nitrogen-based gas mixtures". Revista de Metalurgia 47, n. 1 (28 febbraio 2011): 29–37. http://dx.doi.org/10.3989/revmetalmadrid.0962.

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Più fonti

Tesi sul tema "Nitrogen"

1

Mooleki, Siyambango Patrick. "Synchronization of nitrogen availability and plant nitrogen demand, nitrogen and non-nitrogen effects of lentil to subsequent wheat crops". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0029/NQ63902.pdf.

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2

Ritchie, Karl B. "Influences of Nitrogen Supply and Elevated CO2 on Nitrogen Consumption, Nitrogen Loss, Tissue Nitrogen Concentration, and Yield of Hydroponic Wheat". DigitalCommons@USU, 1994. https://digitalcommons.usu.edu/etd/6746.

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Wheat was grown hydroponically for 23 days ( early boot stage) in a controlled environment at NO3- concentrations of 100 and 1000 μ,M and CO2 levels of 360 and 1200 μ,mol mo1-1. Nitrogen consumption and transpiration were measured daily. Tissue nitrogen concentration, total biomass, and percent root mass were measured at harvest. Nitrogen recovery and nitrogen use efficiency were calculated. Elevated CO2 increased nitrogen consumption of the 100 μ,M NO3- treatment by 13.6% and the 1000 μ,M NO3- treatment by 21.3%. These increases were particularly evident during tillering and early grain fill. Whole plant nitrogen, shoot NO3-, and root NO3- concentrations were increased by elevated CO2. High CO2increased biomass by 15% and increased percent root mass by 11 %. Nitrogen recovery and nitrogen use efficiency were similar at both CO2 concentrations. Transpiration (L m-2ground d-1) decreased by 40% in elevated CO2. The 1000 μ,M NO3- treatment consumed more NO3- than did the 100 μ,M NO3- treatment (8.1% in ambient CO2, 15.5% in elevated CO2); this effect was most pronounced during the last 5 days of the experiment (flag leaf emergence and early grain fill). Percent root mass increased as N concentration decreased from 1000 to 100 μ,M. Nitrogen levels did not significantly affect tissue N concentration or biomass. Nitrogen losses increased as N supply increased; an average of 16% of the nitrogen added to the 100 μ,M NO3- treatment was lost, while the 1000 μ,M NO3- treatment lost 21%. Nitrogen use efficiency and transpiration were similar in both nitrogen treatments.

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3

Farr, C. R. "Nitrogen Stabilizer Effect on Nitrate Nitrogen Management in Soils". College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/204454.

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4

Klawonn, Isabell. "Marine nitrogen fixation : Cyanobacterial nitrogen fixation and the fate of new nitrogen in the Baltic Sea". Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-122080.

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Biogeochemical processes in the marine biosphere are important in global element cycling and greatly influence the gas composition of the Earth’s atmosphere. The nitrogen cycle is a key component of marine biogeochemical cycles. Nitrogen is an essential constituent of living organisms, but bioavailable nitrogen is often short in supply thus limiting primary production. The largest input of nitrogen to the marine environment is by N2-fixation, the transformation of inert N2 gas into bioavailable ammonium by a distinct group of microbes. Hence, N2-fixation bypasses nitrogen limitation and stimulates productivity in oligotrophic regions of the marine biosphere. Extensive blooms of N2-fixing cyanobacteria occur regularly during summer in the Baltic Sea. N2-fixation during these blooms adds several hundred kilotons of new nitrogen into the Baltic Proper, which is similar in magnitude to the annual nitrogen load by riverine discharge and more than twice the atmospheric nitrogen deposition in this area. N2-fixing cyanobacteria are therefore a critical constituent of nitrogen cycling in the Baltic Sea. In this thesis N2 fixation of common cyanobacteria in the Baltic Sea and the direct fate of newly fixed nitrogen in otherwise nitrogen-impoverished waters were investigated. Initially, the commonly used 15N-stable isotope assay for N2-fixation measurements was evaluated and optimized in terms of reliability and practicality (Paper I), and later applied for N2-fixation assessments (Paper II–IV). N2 fixation in surface waters of the Baltic Sea was restricted to large filamentous heterocystous cyanobacteria (Aphanizomenon sp., Nodularia spumigena, Dolichospermum spp.) and absent in smaller filamentous cyanobacteria such as Pseudanabaena sp., and unicellular and colonial picocyanobacteria (Paper II-III). Most of the N2-fixation in the Northern Baltic Proper was contributed by Aphanizomenon sp. due to its high abundance throughout the summer and similar rates of specific N2-fixation as Dolichospermum spp. and N. spumigena. Specific N2 fixation was substantially higher near the coast than in an offshore region (Paper II). Half of the fixed nitrogen was released as ammonium at the site near the coast and taken up by non-N2-fixing organisms including phototrophic and heterotrophic, prokaryotic and eukaryotic planktonic organisms. Newly fixed nitrogen was thereby rapidly turned-over in the nitrogen-depleted waters (Paper III). In colonies of N. spumigena even the potential for a complete nitrogen cycle condensed to a microcosm of a few millimeters could be demonstrated (Paper IV). Cyanobacterial colonies can therefore be hot-spots of nitrogen transformation processes potentially including nitrogen gain, recycling and loss processes. In conclusion, blooms of cyanobacteria are instrumental for productivity and CO2 sequestration in the Baltic Sea. These findings advance our understanding of biogeochemical cycles and ecosystem functioning in relation to cyanobacterial blooms in the Baltic Sea with relevance for both ecosystem-based management in the Baltic Sea, and N2-fixation and nitrogen cycling in the global ocean.

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 2: Manuscript.

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5

Nilsson, Lino. "Nitrogen transformations at the Kiruna mine : The use of stable nitrogen isotopes to trace nitrogen-transforming processes". Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-209419.

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Release of different nitrogen compounds can cause eutrophication in lakes and rivers whichcan lead to oxygen-free environments in bottom water and in the sediment and can in turnlead to fish-deaths. Ammonium can be toxic to biota and nitrate can in high concentrationeven be toxic to humans. WHO has released a limit for nitrate concentration in drinking waterof 10mg/l. The LKAB mine in Kiruna is the largest underground iron mine in the world and isprospecting, mining and refining iron ore, with an annual production of around 28 milliontons. Release of different nitrogen compounds as a result of the explosives used during themining operations has been a known problem for some time; however the processes affectingnitrogen during the water transport have never been fully investigated. The main objective of this MSc thesis is to determine if changes in nitrogen and oxygenisotope composition can be used as a tracer for nitrogen transformation processes in the minewater at LKABs underground mine in Kiruna. Water samples were collected at key points in the water transport system and were analyzedfor isotopic composition. Isotopic and chemical data revealed two different sources of nitrateand ammonium, undetonated explosives and leachate from waste rocks. Three differentnitrogen changing processes affecting concentration of nitrate and ammonium were found:ammonium volatilization, nitrification and sorption. It was not possible to quantify theseprocesses individually. No processes which decrease the nitrate concentration were found.

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6

Goshima, H., T. Suzuki, N. Hayakawa, M. Hikita e H. Okubo. "Dielectric breakdown characteristics of cryogenic nitrogen gas above liquid nitrogen". IEEE, 1994. http://hdl.handle.net/2237/6812.

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7

Brown, Tabitha Therisa. "Variable rate nitrogen and seeding to improve nitrogen use efficiency". Thesis, Washington State University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10043121.

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Increased nitrogen (N) fertilizer additions to modern agricultural cropping systems will be necessary to feed a growing world population. However, greater nitrogen use efficiency (NUE) is required if agroecosystems are to continue to provide certain ecosystem services (e.g., greenhouse gas emission reductions and water quality goals). The aim of this research was to investigate the role of variable rate N and seeding of winter wheat (Triticum aestivum) for optimizing yield-water-NUE relationships across heterogeneous landscapes. Field plot studies were conducted at the Cook Agronomy Farm (CAF) near Pullman, WA during the 2010, 2011 and 2012 winter wheat harvest years. A randomized complete block split plot N rate x seeding rate experiment with N fertilizer rate as main plot and seeding rate as subplot was employed across three landscape positions. Assessed were evidence of “haying-off”, depletion of available water resources, and the link between yield, protein, and NUE response to landscape by N fertilization rate by seeding rate treatment combinations. A performance classification was developed to evaluate wheat performance with regard to N utilization efficiency (Gw/Nt) and N uptake efficiency (Nt/Ns) components of the NUE.

Evidence of haying-off in winter wheat was medium to high for drier landscape positions, particularly during low precipitation years and likely occurs in these landscapes most years. Treatment impacts on NUE varied by year and landscape but overall NUE decreased by 14 to 22 kg grain yield per kg N supply as N rate increased from 0 to 160 kg N ha^-1 across three landscape positions and two site years (2011 and 2012). Target NUE and maximum anthesis biomass could be achieved with a 34 to 68% reduction in typical seeding rates. The NUE-based performance classification was helpful in identifying environmental or management conditions contributing to low or high NUE indicating potential to be used as an evaluation tool. This research also included a policy fellowship focused on N₂O emission reductions and greenhouse gas offset credits that could be generated from adoption of variable rate N for wheat and concluded that offset credits alone would not provide enough incentive for adoption of variable rate N.

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8

Aguilar, Michelle. "Ruminal Nitrogen Recycling and Nitrogen Efficiency in Lactating Dairy Cattle". Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/76829.

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Excess nitrogen (N) excretion from animal agriculture results in reduced air and water quality, and poses a risk to human health. Although the dairy industry utilizes milk urea N (MUN) to monitor protein feeding and N excretion, phenotypic diversity among cows may influence MUN and thus bias feed management. An initial study using data from 2 previously published research trials and a field trial, observed that cow had a significant effect on MUN variation. Regression models, utilized to predict MUN, corrected for dietary nutrients and some animal effects, and thus the observed effect of cow on MUN variation may reflect genetic selection decisions of animals with either poor or efficient urea transport. A second trial observed that MUN and PUN concentrations were positively correlated with gut urea clearance, providing evidence for differences in urea transport activity among cows. The presence of urea transport variation suggests that current protein recommendations may not estimate true requirements. A third trial observed that animals fed sub-NRC levels of RDP and RUP had reduced N intake and excretion of fecal N, urinary urea-N, and MUN. Animals maximized N efficiency and had no loss in milk production, suggesting a possible overestimation of RDP and RUP in the current NRC prediction model. The present project provides evidence for phenotypic variation among cows, which may be partially explained by differences in urea transport activity. Future work confirming genetic variation among urea transporters may provide an opportunity to improve feeding management if cow urea efficiency is known.
Master of Science

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9

Campana, Mariana [UNESP]. "Coletores de amônia, fontes e formas de aplicação de nitrogênio em Panicum maximum CV. Tanzânia submetido a manejo intensivo". Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/95286.

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Made available in DSpace on 2014-06-11T19:27:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-01-12Bitstream added on 2014-06-13T20:17:00Z : No. of bitstreams: 1 campana_m_me_botfmvz.pdf: 694345 bytes, checksum: 5b95a0f43e56990d64086b8a724378b9 (MD5)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Universidade Estadual Paulista (UNESP)
Com objetivo de validar o uso no campo do coletor de espuma com ácido e politetrafluoroetileno que capta amônia volatilizada e quantificar essa perda oriunda de fontes e formas de aplicação de nitrogênio (N) em pastagens, realizou-se 2 experimentos. No experimento 1, para avaliação do coletor, utilizou-se fatorial 2 x 2 - doses de N (50 e 100 kg/ha) e coletores de amônia (coletor semi-aberto e absorvedor de espuma com ácido e politretafluoroetileno). O período experimental foi de 22 dias. No experimento 2 utilizou-se delineamento de blocos ao acaso e os tratamentos foram: uréia; Super N®; uréia + 12,5% de zeólita; uréia + 25% de zeólita; uréia + 50% de zeólita; uréia em pulverização foliar; 75% de uréia + 25% de sulfato de amônio; nitrato de amônio e sem N (testemunha). A avaliação das perdas por volatilização de amônia ocorreu em 3 épocas. No verão/07 e inverno/07 utilizou-se dose de 50 kg/ha de N para adubos sólidos e 15 kg/ha de N para pulverização foliar e para o verão/08 as doses foram duplicadas. As perdas diárias de amônia foram avaliadas em onze amostragens a cada dois dias para ambos os experimentos. Para o experimento 1, não houve diferença entre os coletores na perda acumulada e diária de amônia com a dose de 50 kg/ha de N. Entretanto, na dose de 100 kg/ha de N o coletor semi-aberto captou o maior pico de volatilização diária e maior acúmulo de amônia. No experimento 2 as menores perdas por volatilização foram detectadas para nitrato de amônio aplicado a lanço e uréia via pulverização foliar. Dessa forma poderia ocorrer melhor uso do fertilizante pela planta refletindo em aumento na produção e qualidade da forragem.
With the objective of validating the field use of the foam collector with acid and polytetrafluorethylene, which captures volatilized ammonia and quantify this loss when using sources and application forms of nitrogen (N) in pastures, 2 experiments were realized. In the experiment 1, to evaluate the collector a 2 x 2 factorial – N doses (50 and 100 kg/ha) and ammonia collectors (semi-open collector and foam absorber with acid and polytetrafluorethylene). The experimental period was 22 days. In the experiment 2, the experimental design was a randomized block design and the treatments were: urea; Super N®; urea + 12,5% of zeolite; urea + 25% of zeolite; urea + 50% of zeolite; urea leaf spraying, 75% of urea + 25% of ammonium sulfate, ammonium nitrate, and without nitrogen (control). The evaluation of the volatilization losses occurred in 3 periods. On summer/07 and winter/2007 a 50 kg/ha of N dose for solid fertilizers was used and a 15 kg/ha N dose for leaf spraying and on summer/2008 the doses were doubled. The daily losses of ammonia were evaluated in eleven samplings every two days for both experiments. In the experiment 1, there was no difference between the collectors in the accumulated and daily loss in the dose of 50kg/ha of N. However, with the dose of 100 kg/ha of N the semi-open collector showed the highest peak of daily volatilization and accumulated the highest volatilization loss. In the experiment 2, the lowest volatilization losses were detected for ammonium nitrate in soil application and urea in leaf spraying application. So, in this cases might happen the better use of the fertilizer by the plant, reflecting in the increase of the forage production and quality.

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10

Barreto, Rafael Ferreira. "Interação entre silício e citocininas nas respostas do tomateiro à toxicidade de amônio /". Jaboticabal, 2019. http://hdl.handle.net/11449/182116.

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Orientador: Renato de Mello Prado
Coorientador: Rogério Falleiros Carvalho
Banca: Arthur Bernardes Cecilio Filho
Banca: Cid Naudi Silva Campos
Banca: Lucas Aparecido Gaion
Banca: Lilian Ellen Pino
Resumo: Uma consequência da toxicidade de amônio (NH4+) é a diminuição do conteúdo de citocininas (CKs). Dessa forma, o fornecimento de CK, na forma de trans-zeatina (tZ), pode aliviar a toxicidade de NH4+, e a CK sintética 6-benziladenina (BA), de menor custo, ainda não foi estudada quanto ao seu efeito sobre a toxicidade de NH4+. Além disso, o silício (Si), que é um elemento benéfico, é capaz de amenizar vários estresses, como a toxicidade de NH4+. Objetivou-se verificar se o alívio da toxicidade de NH4+ com o uso do Si é dependente do aumento do teor de CKs no tomateiro cv Micro-Tom (MT), os efeitos do Si no tomateiro transgênico MT CKX2 (baixo teor de CKs) submetido à toxicidade de NH4+ e se o regulador de crescimento BA alivia a toxicidade de NH4+ no tomateiro MT. Para isso, realizaram-se cinco experimentos em tomateiro, com a aplicação dos tratamentos na solução nutritiva. No experimento com concentrações de NH4+ entre 1,25 e 7,5 mmol L-1, 5,9 mmol L-1 provocou a toxicidade de NH4+, com diminiução de 10% na massa seca da parte aérea. No experimento com concentrações de Si entre 0,2 e 0,8 mmol L-1, na forma de silicato de potássio (SiK) ou ácido silícico estabilizado (ASiE), a toxicidade de NH4+ não foi aliviada. No experimento com concentrações de Si entre 1,0 e 2,5 mmol L-1, na forma de SiK, a concentração de 1,29 mmol L-1 de Si aliviou a toxicidade de NH4+. No experimento com N nas formas de NO3- ou NH4+ (5,9 mmol L-1), na ausência e na presença de Si (1,29 mmol L-1) no tomat... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: A consequence of ammonium (NH4+) toxicity is the decrease in cytokinins (CKs) content. However, the supply of CK in the nutrient solution, in trans-zeatin (tZ) form, can alleviate NH4+ toxicity, and CK synthetic 6-benzyladenine (BA), with lower cost, has not yet been studied on the NH4+ toxicity. Similarly, silicon (Si), which is a beneficial element known to relieve stresses, also alleviates NH4+ toxicity. The objective was to verify if the relief of NH4+ toxicity by Si is dependent on the increase of the CKs content in tomato cv Micro-Tom (MT), the effects of Si on the transgenic tomato MT CKX2 (CKs deficient) submitted to NH4+ toxicity, and if the growth regulator 6-benzyladenine (BA) alleviates NH4+ toxicity in tomato MT. For this, five experiments were carried in tomato, with treatments application in nutrient solution. In experiment with NH4+ concentrations between 1.25 and 7.5 mmol L-1, 5.9 mmol L-1 caused NH4+ toxicity, with shoot dry weight 10% decrease. In experiment with Si concentrations between 0.2 and 0.8 mmol L-1, via potassium silicate (SiK) or stabilized silicic acid (ASiE), NH4+ toxicity was not alleviated. In the experiment with Si concentrations between 1 and 2.5 mmol L-1, via SiK, the concentration of 1.29 mmol L-1 alleviated NH4+ toxicity. In experiment with N in NO3- or NH4+ forms (5.9 mmol L-1), in absence and presence of Si (1.29 mmol L-1) in MT tomato, Si decreased CKs content in root and increase in shoot, independent of the N form. In same experime... (Complete abstract click electronic access below)
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Più fonti

Libri sul tema "Nitrogen"

1

Farndon, John. Nitrogen. New York: Benchmark Books, 1999.

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2

Conservation in Agricultural Education. Guidance Group. e Farming and Wildlife Advisory Group., a cura di. Nitrogen. Sandy (Beds.): Conservation in Agricultural Education Guidance Group, 1987.

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3

Blashfield, Jean F. Nitrogen. Austin, Tex: Raintree Steck-Vaughn, 1999.

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4

Blashfield, Jean F. Nitrogen. Austin, Tex: Raintree Steck-Vaughn, 1999.

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5

Cantrell, Raymond L. Nitrogen. Washington, D.C: U.S. Department of the Interior, Bureau of Mines, 1991.

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6

Hack, Walter, Reinhard Haubold, Claudia Heinrich-Sterzel, Hannelore Keller-Rudek, Ulrike Ohms-Bredemann, Dag Schiöberg e Carol Strametz. N Nitrogen. A cura di Dieter Koschel, Peter Merlet, Ulrike Ohms-Bredemann e Joachim Wagner. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-06333-0.

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Haubold, Reinhard, Claudia Heinrich-Sterzel, Peter Merlet, Ulrike Ohms-Bredeman, Carol Strametz e Astrid Wietelmann. N Nitrogen. A cura di Dieter Koschel, Peter Merlet, Astrid Wietelmann e Peter Merlet. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-06336-1.

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8

Travis, Anthony S. Nitrogen Capture. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-68963-0.

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9

Ribbe, Markus W., a cura di. Nitrogen Fixation. Totowa, NJ: Humana Press, 2011. http://dx.doi.org/10.1007/978-1-61779-194-9.

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10

Polsinelli, M., R. Materassi e M. Vincenzini, a cura di. Nitrogen Fixation. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3486-6.

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Più fonti

Capitoli di libri sul tema "Nitrogen"

1

Pedersen, Thomas F. "Nitrogen". In Encyclopedia of Marine Geosciences, 1–2. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6644-0_79-1.

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2

Pedersen, Thomas. "Nitrogen". In Encyclopedia of Marine Geosciences, 1–2. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6644-0_79-2.

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3

Cartigny, Pierre. "Nitrogen". In Encyclopedia of Earth Sciences Series, 1–2. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-39193-9_196-1.

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4

Cartigny, Pierre. "Nitrogen". In Encyclopedia of Earth Sciences Series, 985–86. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-39312-4_196.

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5

Smil, Vaclav. "Nitrogen". In Carbon-Nitrogen-Sulfur, 115–249. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4684-8839-5_3.

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6

Cleaves, Henderson James. "Nitrogen". In Encyclopedia of Astrobiology, 1119–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_1061.

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Bährle-Rapp, Marina. "Nitrogen". In Springer Lexikon Kosmetik und Körperpflege, 378. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_6959.

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Boyd, Claude E. "Nitrogen". In Water Quality, 175–92. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4485-2_11.

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9

O’Neill, Peter. "Nitrogen". In Environmental Chemistry, 92–107. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-010-9318-7_5.

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Boyd, Claude E. "Nitrogen". In Water Quality, 223–41. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17446-4_11.

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Atti di convegni sul tema "Nitrogen"

1

Hu, Hannah, Daniel Bafia e Young-Kee Kim. "Decoupling of Nitrogen and Oxygen Impurities in Nitrogen Doped SRF Cavities". In Decoupling of Nitrogen and Oxygen Impurities in Nitrogen Doped SRF Cavities. US DOE, 2024. http://dx.doi.org/10.2172/2376958.

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2

Abadi, Aharon, Yael Dubinsky, Andrei Kirshin, Yossi Mesika, Idan Ben-Harrush e Uzy Hadad. "NitroGen". In the 2013 companion publication for conference. New York, New York, USA: ACM Press, 2013. http://dx.doi.org/10.1145/2508075.2514571.

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3

Mailhiot, C., L. H. Yang, A. K. McMahan e T. W. Barbee. "Polymeric nitrogen". In High-pressure science and technology—1993. AIP, 1994. http://dx.doi.org/10.1063/1.46314.

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4

Melai, Caterina, Daniel Frost, Yoshihiro Furukawa, Akizumi Ishida e Akio Suzuki. "Nitrogen Contents and Nitrogen Isotope Fractionation in Subduction Zones". In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1774.

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5

Chouhan, V. "Electropolishing study on nitrogen-doped niobium surface". In Electropolishing study on nitrogen-doped niobium surface. US DOE, 2023. http://dx.doi.org/10.2172/1993460.

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6

"5. Nitrogen Rates". In Final Report: Gulf Hypoxia and Local Water Quality Concerns Workshop. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2008. http://dx.doi.org/10.13031/2013.24244.

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CHUKALOVSKY, A. A., T. V. RAKHIMOV, YU A. MANKELEVICH, A. V. VOLYNETS, D. V. LOPAEV e N. A. POPOV. "ANALYSIS OF NITROGEN DISSOCIATION IN NITROGEN DIRECT-CURRENT GLOW DISCHARGE". In NONEQUILIBRIUM PROCESSES. TORUS PRESS, 2018. http://dx.doi.org/10.30826/nepcap2018-1-05.

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Ovcharenko, Victor. "MULTISPIN COMPOUNDS CONTAINING NITROGEN-OXYGEN FRAGMENTS". In Chemistry of nitro compounds and related nitrogen-oxygen systems. LLC MAKS Press, 2019. http://dx.doi.org/10.29003/m715.aks-2019/24-26.

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9

Ford, W. I., e J. F. Fox. "Model of Nitrogen Source Allocations and Transformations Using Stable Nitrogen Isotopes". In World Environmental and Water Resources Congress 2013. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412947.194.

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RAZUMOV, Nikolay, Tagir MAKHMU, Anatoliy POPOVICH, Evgeniy GYULIKHANDANOV, Artem KIM e Alexey SHAMSHURIN. "MECHANICAL ALLOYING OF HIGH NITROGEN STAINLESS STEEL POWDERS WITH METAL NITRIDES AND NITROGEN-CONTAINING FERROALLOY AS A NITROGEN SOURCE". In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.842.

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Rapporti di organizzazioni sul tema "Nitrogen"

1

Veen, A. van, K. T. Westerduin, H. Schut, E. J. E. Melker, B. J. Thijsse, B. Nielsen, P. Asoka Kumar, V. J. Ghosh e K. G. Lynn. Nitrogen vacancy complexes in nitrogen irradiated metals. Office of Scientific and Technical Information (OSTI), dicembre 1996. http://dx.doi.org/10.2172/432981.

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Vij, Ashwani, William Wilson, Vandana Vij, Karl Christe e F. Tham. Nitrogen Fluoride Chemistry. Fort Belvoir, VA: Defense Technical Information Center, giugno 2002. http://dx.doi.org/10.21236/ada408824.

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3

Paul J. Chirik. Understanding Nitrogen Fixation. Office of Scientific and Technical Information (OSTI), maggio 2012. http://dx.doi.org/10.2172/1041006.

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4

Barbagli, Tommaso, Jim van Ruijven, Wim Voogt e Aat van Winkel. Soilless USDA-organic cultivation of tomato with ‘Natural nitrogen’ : a comparison study between ‘Natural nitrogen’ and organic nitrogen. Wageningen: Stichting Wageningen Research, Wageningen Plant Research, Business unit Glastuinbouw, 2022. http://dx.doi.org/10.18174/567866.

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5

Browne, Kevin Patrick. Actinide High-Nitrogen Chemistry. Office of Scientific and Technical Information (OSTI), maggio 2015. http://dx.doi.org/10.2172/1179259.

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6

Licht, Mark A., Zachary A. Koopman e Kent R. Berns. Split Nitrogen Application Trial. Ames: Iowa State University, Digital Repository, 2013. http://dx.doi.org/10.31274/farmprogressreports-180814-1816.

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Licht, Mark A., e Kent R. Berns. Split Nitrogen Application Trial. Ames: Iowa State University, Digital Repository, 2012. http://dx.doi.org/10.31274/farmprogressreports-180814-1836.

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8

Delnick, Frank M. The Nitrogen-Nitride Anode. Office of Scientific and Technical Information (OSTI), ottobre 2014. http://dx.doi.org/10.2172/1160294.

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9

Lee, E. U., e R. Taylor. High Nitrogen Stainless Steel. Fort Belvoir, VA: Defense Technical Information Center, luglio 2011. http://dx.doi.org/10.21236/ada546181.

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10

Kurita, C. H. Gaseous Nitrogen Heat Exchanger. Office of Scientific and Technical Information (OSTI), agosto 1988. http://dx.doi.org/10.2172/1031178.

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