31P NMR spectroscopy and structural models of soil organic phosphorus under Eucalyptus

Rinaldi, Laís Chierici Bernardes; Aleixo, Seldon; Silva, Erika Caitano da; Gama-Rodrigues, Antônio Carlos; Gama-Rodrigues, Emanuela Forestieri; Gonçalves, José Leonardo de Moraes; Rocha, José Henrique Tertulino; Schripsema, Jan

doi:10.1007/s10705-021-10139-4

Cited by 4 publications

(1 citation statement)

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“…The extraction with NaOH+Na 2 EDTA (Bowman and Moir, 1993), in order to compose the 31 P nuclear magnetic resonance spectroscopy solution ( 31 P NMR), is the most widely used for understanding the soil P cycle (Cade-Menun and Liu, 2014). Furthermore, according to Turner et al (2005), a joint use of quantification methods, such as sequential "Hedley" extraction, with 31 P NMR can collaborate to elucidate the transformations in discrete pools of the organic and inorganic phosphorus cycle in soils under Eucalyptus plantations (Rinaldi et al, 2021) and leguminous trees (Aleixo et al, 2020). However, 31 P NMR may have limited use due to its relatively high cost, and it is currently impossible to recommend it as a routine technique used in Brazilian accredited soil analysis laboratories.…”

Section: Discussionmentioning

confidence: 99%

Soil organic phosphorus in Eucalyptus plantations, Brazil: extraction methods

Alvarenga,

Costa,

Gama-Rodrigues

et al. 2024

Sci. agric. (Piracicaba, Braz.)

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In-depth knowledge of total soil organic phosphorus (TP O ) as a potential P source for plants allows for a comprehensive understanding of the adoption of an efficient management system of phosphorus fertilization in forest plantations. Thus, we aimed to compare three TP O extraction methods (Hedley; Bowman; Bowman and Moir) in different Eucalyptus plantations on strongly weathered soils. The TP O concentrations obtained by the "Hedley" (mean of 130 mg kg -1 ), and "Bowman and Moir" methods (mean of 131 mg kg -1 ) were similar. The "Bowman" method extracted less than 50 % of the TP O content extracted by the other methods. Both "Hedley" and "Bowman and Moir" methods showed similar TP O extraction efficiency compared to TP determined by acid digestion. However, the "Hedley" method is the most expensive and time-consuming analytical technique. In view of this, the NaOH+Na 2 EDTA extractor (Bowman and Moir) would be the most suitable since, in addition to showing high extraction efficiency, it offers fast analysis execution, low analytical error, and lower cost.

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