Nature of soil organic phosphorus: an assessment of peak assignments in the diester region of 31P NMR spectra

Макаров, М. И.; Haumaier, Ludwig; Zech, Wolfgang

doi:10.1016/s0038-0717(02)00091-3

Cited by 144 publications

(128 citation statements)

References 34 publications

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“…Also concentrations of NaOH and EDTA in these mixtures are varied slightly among studies depending upon their objectives. Recoveries ranged from 57 to 90 % with 0.25 MNaOH-50 mM EDTA extraction of soil (Makarov et al 2002) and sediment (Zhu et al 2013a;Zhang et al 2014). In this study, the optimal extraction of P o from aquatic macrophytes and algae was achieved by use of 0.5 M NaOH-25 mM EDTA ( Table 2).…”

Section: Naoh-edta Extractable P From Aquatic Macrophytes and Algaementioning

confidence: 68%

“…These extractants have included NaAs-SD, H 2 O, weak acid, NaHCO 3 , H 2 SO 4 , NaOH, and NaOH-EDTA. Recoveries varied among these extractants (Makarov et al 2002;He et al 2009;Noack et al 2014;Read et al 2014;Turner et al 2012;Zhang et al 2014). In general, recovery was approximately 5∼8 % with 50 mM H 2 SO 4 and 500 mM NaHCO 3 as the extraction agent in fresh microbial cells (Makarov et al 2002).…”

Section: Naoh-edta Extractable P From Aquatic Macrophytes and Algaementioning

confidence: 98%

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Characterization of phosphorus forms in lake macrophytes and algae by solution 31P nuclear magnetic resonance spectroscopy

Feng

Zhu

et al. 2015

Environ Sci Pollut Res

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Debris from aquatic macrophytes and algae are important recycling sources of phosphorus (P), which can result in continuing blooms of algae by recycling bioavailable P in the eutrophic lakes. However, knowledge of forms of P in aquatic macrophytes and algae and their contribution to internal loads of P in lakes is limited. Without such knowledge, it is difficult to develop appropriate strategies to remediate and or restore aquatic ecosystems that have become eutrophic. Therefore, in this work, P was extracted from six types of aquatic macrophytes and algae collected from Tai Lake of China and characterized by use of solution 31 P-nuclear magnetic resonance (NMR) spectroscopy. When extracted by 0.5 M NaOH-25 mM EDTA, extraction recovery of total P(TP) and organic P(P o ) exceeded 90 %. Concentrations of P o in algae and aquatic macrophytes were 5552 mg kg −1 and 1005 mg kg −1 and accounted for 56.0 and 47.2 % of TP, respectively. When P o , including condensed P, was characterized by solution 31 P-NMR P o in algae included orthophosphate monoesters (79.8 %), pyrophosphate (18.2 %), and orthophosphate diester (2.0 %), and P o in aquatic macrophytes included orthophosphate monoesters (90.3 %), pyrophosphate (4.2 %), and orthophosphate diester (5.5 %). Additionally, orthophosphate monoesters in algal debris mainly included β-glycerophosphate (44.1 %), α-glycerophosphate (13.5 %), and glucose 6-phosphate (13.5 %). Orthophosphate monoesters in aquatic macrophytes mainly included β-glycerophosphate (27.9 %), α-glycerophosphate (24.6 %), and adenosine 5′ monophosphate (8.2 %). Results derived from this study will be useful in better understanding nutrient cycling, relevant eutrophication processes, and pollution control for freshwater lakes.

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Section: Naoh-edta Extractable P From Aquatic Macrophytes and Algaementioning

confidence: 68%

Section: Naoh-edta Extractable P From Aquatic Macrophytes and Algaementioning

confidence: 98%

Characterization of phosphorus forms in lake macrophytes and algae by solution 31P nuclear magnetic resonance spectroscopy

Feng

Zhu

et al. 2015

Environ Sci Pollut Res

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“…Todavia, a concentração real dos componentes diésteres do solo pode ser subestimada e as formas monoésteres superestimadas, quando analisadas em extrato alcalino. Esse processo deve-se à quase completa hidrólise do RNA e à parcial hidrólise dos fosfolipídios em monoéster (Makarov et al, 2002). A utilização dessa relação, visando estimar a proporção de P lábil no solo, deve considerar as transformações ocasionadas pelos extratores (Makarov et al, 2002), uma vez que sua natureza química pode interferir nos resultados, levando a conclusões equivocadas.…”

Section: Resultsunclassified

“…Nos últimos anos, a utilização da RMN 31 P permitiu a investigação da natureza química do P, possibilitando maior conhecimento sobre as transformações dos compostos fosfatados minerais e orgânicos presentes em vários ambientes (Makarov, 1998;Makarov et al, 2002).…”

Section: Introductionunclassified

Fósforo num Cambissolo cultivado com cana-de-açúcar por longo tempo: II - análise de ácidos húmicos por RMN 31P

Busato¹,

Canellas²,

Rumjanek

et al. 2005

Rev. Bras. Ciênc. Solo

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RESUMOSistemas de manejo da lavoura de cana-de-açúcar que favoreçam a matéria orgânica do solo podem aumentar o conteúdo de nutrientes disponíveis e diminuir a necessidade de aplicação de fertilizantes industriais. Apesar da importância dos componentes orgânicos no fornecimento de P, pouco se conhece sobre a sua dinâmica em ambientes tropicais. O objetivo deste trabalho foi identificar, por meio da ressonância magnética nuclear (RMN 31 P), as espécies de P nos ácidos húmicos de um Cambissolo Háplico Ta eutrófico vértico, localizado no Município de Campos dos Goytacazes, norte do Estado do Rio de Janeiro, e cultivado com cana-de-açúcar com preservação do palhiço e adição de vinhaça por longo tempo. Por meio da análise de RMN 31 P foi possível observar acúmulo de P orgânico em formas mais facilmente mineralizadas nas áreas com preservação de matéria orgânica, tal como P em ligações diésteres. Nas áreas de cana queimada, houve maior participação de espécies orgânicas mais estáveis, como o ortofosfato em ligações monoésteres. Os resultados da espectroscopia de RMN 31 P mostram que, nas áreas com maior aporte de resíduo orgânico (i.e., cana crua e cana queimada com adição de vinhaça), os ácidos húmicos constituem uma reserva importante de P orgânico prontamente disponível. Já, nas áreas de cana queimada, o acúmulo de P orgânico recalcitrante nos ácidos húmicos indica utilização do P-lábil das substâncias húmicas como fonte importante para nutrição das plantas.Termos de indexação: cana crua, substâncias húmicas, vinhaça, solo tropical.

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“…The effects of alkaline and acid hydrolysis for a wide range of soil organic phosphorus compounds have been found to be markedly influenced by the nature of the phosphorus species [44,46,47]. The extraction of fast hydrolysable phosphorus forms (e.g., phosphatidyl choline) may hence explain the discrepancy in Table 5 between the on-line and off-line (SI-MCE) data for NaOH and HCl extracts in the HL scheme.…”

Section: Comparison Of On-line and Off-line Modes For Phosphorus Detementioning

confidence: 99%

A multisyringe flow-through sequential extraction system for on-line monitoring of orthophosphate in soils and sediments

Buanuam

Miró

Hansen

et al. 2007

Talanta

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Nature of soil organic phosphorus: an assessment of peak assignments in the diester region of 31P NMR spectra

Cited by 144 publications

References 34 publications

Characterization of phosphorus forms in lake macrophytes and algae by solution 31P nuclear magnetic resonance spectroscopy

Characterization of phosphorus forms in lake macrophytes and algae by solution 31P nuclear magnetic resonance spectroscopy

Fósforo num Cambissolo cultivado com cana-de-açúcar por longo tempo: II - análise de ácidos húmicos por RMN 31P

A multisyringe flow-through sequential extraction system for on-line monitoring of orthophosphate in soils and sediments

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