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Type: Journal article
Title: The chemical nature of P accumulation in agricultural soils-implications for fertiliser management and design: an Australian perspective
Author: McLaughlin, M.
McBeath, T.
Smernik, R.
Stacey, S.
Ajiboye, A.
Guppy, C.
Citation: Plant and Soil, 2011; 349(1-2 Sp Is):69-87
Publisher: Kluwer Academic Publ
Issue Date: 2011
ISSN: 0032-079X
Statement of
Mike J. McLaughlin, Therese M. McBeath, Ron Smernik, Sam P. Stacey, Babasola Ajiboye and Chris Guppy
Abstract: Many agricultural soils worldwide in their natural state are deficient in phosphorus (P), and the production of healthy agricultural crops has required the regular addition of P fertilisers. In cropping systems, P accumulates almost predominantly in inorganic forms in soil, associated with aluminium, calcium and iron. In pasture soils, P accumulates in both inorganic and organic forms, but the chemical nature of much organic P is still unresolved. The P use efficiency (PUE) of fertilisers is generally low in the year of application, but residual effectiveness is important, highlighting the importance of soil P testing prior to fertiliser use. With increasing costs of P fertiliser, various technologies have been suggested to improve PUE, but few have provided solid field evidence for efficacy. Fluid fertilisers have been demonstrated under field conditions to increase PUE on highly calcareous soils. Slow release P products have been demonstrated to improve PUE in soils where leaching is important. Modification of soil chemistry around the fertiliser granule or fluid injection point also offers promise for increasing PUE, but is less well validated. Better placement of P, even into subsoils, also offers promise to increase PUE in both cropping and pasture systems.
Keywords: P-use efficiency; Inorganic P; Organic P; Sorption; Precipitation; Fixation; Fertiliser placement
Rights: Copyright Springer Science+Business Media B.V. 2011
RMID: 0020115200
DOI: 10.1007/s11104-011-0907-7
Appears in Collections:Agriculture, Food and Wine publications
Environment Institute publications

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