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https://hdl.handle.net/1959.11/19705
Title: | The fate of fertiliser P in soil under pasture and uptake by subterraneum clover: a field study using ³³P-labelled single superphosphate | Contributor(s): | McLaren, Timothy (author); McLaughlin, Michael J (author); McBeath, Therese M (author); Simpson, Richard J (author); Smernik, Ronald J (author); Guppy, Christopher (author) ; Richardson, Alan E (author) | Publication Date: | 2016 | Open Access: | Yes | DOI: | 10.1007/s11104-015-2610-6 | Handle Link: | https://hdl.handle.net/1959.11/19705 | Abstract: | Background and aims: Single superphosphate (SSP) is a major source of phosphorus (P) used in grazing systems to improve pasture production. The aim of this experiment was to determine the fate of fertiliser P in clover pastures under field conditions. Methods: A procedure was developed to radiolabel SSP granules with a ³³P radiotracer, which was then applied to the soil surface (equivalent to ~12 kg P ha‾¹) of a clover pasture. Recovery of fertiliser P was determined in clover shoots, fertiliser granules and soil fractions (surface layer: 0-4 cm and sub-surface layer: 4-8cm). Results: The P diffusion patterns of the ³³P-labelled SSP granules were not significantly different to those of commercial SSP granules (P > 0.05). Recovery of fertiliser P in clover shoots was 30-35 %. A considerable proportion of the fertiliser P (~28 %) was recovered in the surface soil layer and was largely inorganic P. Conclusions: Recovery of fertiliser P by clover plants was up to 35 % in the year of application. Much of the fertiliser P in soil fractions was inorganic P, which highlights the importance of inorganic P forms and dynamics in soils under clover pasture on a single season timeframe at these sites. | Publication Type: | Journal Article | Source of Publication: | Plant and Soil, 401(1-2), p. 23-38 | Publisher: | Springer Netherlands | Place of Publication: | Netherlands | ISSN: | 1573-5036 0032-079X |
Fields of Research (FoR) 2008: | 050304 Soil Chemistry (excl. Carbon Sequestration Science) 070306 Crop and Pasture Nutrition |
Fields of Research (FoR) 2020: | 410604 Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) 300407 Crop and pasture nutrition |
Socio-Economic Objective (SEO) 2008: | 830403 Native and Residual Pastures 961402 Farmland, Arable Cropland and Permanent Cropland Soils |
Socio-Economic Objective (SEO) 2020: | 100503 Native and residual pastures 180605 Soils |
Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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File | Description | Size | Format | |
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open/SOURCE02.pdf | Pre-peer review version | 1.54 MB | Adobe PDF Download Adobe | View/Open |
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