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Type: Journal article
Title: Mobility, solubility and lability of fluid and granular forms of P fertiliser in calcareous and non-calcareous soils under laboratory conditions
Author: Lombi, E.
McLaughlin, M.
Johnston, C.
Armstrong, R.
Holloway, R.
Citation: Plant and Soil: international journal on plant-soil relationships, 2005; 269(1-2):25-34
Publisher: Kluwer Academic Publ
Issue Date: 2005
ISSN: 0032-079X
Statement of
E. Lombi, M. J. McLaughlin, C. Johnston, R. D. Armstrong and R. E. Holloway
Abstract: Despite a long history of application of phosphorus fertilisers, P deficiency is still a major limitation to crop production on calcareous soils. Recent field research conducted in highly calcareous soils in southern Australia has demonstrated that both grain yield and P uptake of wheat (Triticum aestivum L.) is greater when fluid forms of P are used compared to granular forms. To improve our understanding of the mechanisms underlying this response to P in the field, we compared the lability, solubility and mobility of P applied as either a fluid (3 products) or granular (3 products) form to two calcareous and one alkaline non-calcareous soils in the laboratory. Over a five-week period, between 9.5 and 18 % of the P initially present in the fertiliser granules did not diffuse into the surrounding soil. The degree of granule dissolution was independent of the soil type. In contrast, P solubility, lability and diffusion were significantly greater when fluid products were applied to the calcareous soils, but not to the alkaline non-calcareous soil. These findings are discussed in relation to field trials results where fluid products outperformed granular fertilisers.
Keywords: phosphorus
fluid and granular fertiliser
alkaline and calcareous soil
Description: The original publication can be found at
DOI: 10.1007/s11104-004-0558-z
Published version:
Appears in Collections:Aurora harvest
Environment Institute publications
Soil and Land Systems publications

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