Please use this identifier to cite or link to this item:
https://hdl.handle.net/1959.11/17780
Title: | The organic P composition of Vertisols as determined by 31P NMR spectroscopy | Contributor(s): | McLaren, Timothy (author); Smernik, Ronald J (author); Guppy, Christopher (author) ; Bell, Mike J (author); Tighe, Matthew (author) | Publication Date: | 2014 | DOI: | 10.2136/sssaj2014.04.0139 | Handle Link: | https://hdl.handle.net/1959.11/17780 | Abstract: | Solution 31P nuclear magnetic resonance (NMR) spectroscopy on sodium hydroxide-ethylenediaminetetraacetic acid (NaOH-EDTA) extracts can provide detailed characterization of soil organic P, but has not been previously applied widely to Vertisols. Vertisol soils were collected at two depths (0-10 cm and 10-30 cm) for chemical and spectroscopic analysis. Sodium hydroxide-EDTA extracted a relatively consistent proportion (17 to 37%; average 25%) of the total organic P content determined by the ignition-H2SO4 extraction technique. Orthophosphate monoesters were the dominant form of organic P detected by solution 31P NMR spectroscopy of the NaOH-EDTA extracts, the majority of which appeared to be present in large 'humic' molecules, based on the predominance of a broad peak in the NMR spectra; some smaller signals due to glycerophosphate, inositol phosphates, and RNA-derived mononucleotides were also evident. The composition of organic P in the topsoil layer was very similar to that in the subsoil layer. Strong correlations were found between soil organic carbon (C) and nitrogen (N) and extractable organic P, which suggests that processes regulating the cycling of organic C and N are closely related to that for organic P in these Vertisols. | Publication Type: | Journal Article | Source of Publication: | Soil Science Society of America Journal, 78(6), p. 1893-1902 | Publisher: | Soil Science Society of America | Place of Publication: | United States of America | ISSN: | 1435-0661 0361-5995 |
Fields of Research (FoR) 2008: | 070101 Agricultural Land Management 050304 Soil Chemistry (excl Carbon Sequestration Science) 050302 Land Capability and Soil Degradation |
Fields of Research (FoR) 2020: | 300202 Agricultural land management 410604 Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) 410601 Land capability and soil productivity |
Socio-Economic Objective (SEO) 2008: | 961402 Farmland, Arable Cropland and Permanent Cropland Soils | Socio-Economic Objective (SEO) 2020: | 180605 Soils | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
---|---|
Appears in Collections: | Journal Article |
Files in This Item:
File | Description | Size | Format |
---|
SCOPUSTM
Citations
35
checked on Feb 17, 2024
Page view(s)
978
checked on Mar 8, 2023
Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.