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https://hdl.handle.net/2440/97216
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dc.contributor.author | Montalvo, D. | - |
dc.contributor.author | Degryse, F. | - |
dc.contributor.author | McLaughlin, M. | - |
dc.date.issued | 2014 | - |
dc.identifier.citation | Soil Science Society of America Journal, 2014; 78(1):214-224 | - |
dc.identifier.issn | 0361-5995 | - |
dc.identifier.issn | 1435-0661 | - |
dc.identifier.uri | http://hdl.handle.net/2440/97216 | - |
dc.description.abstract | Fluid phosphorus (P) fertilizers increase availability of P in calcareous soils compared with granular fertilizers, because of reduced P precipitation. It is unclear whether fluid P forms may also enhance fertilizer P availability in acidic soils. A 35-d incubation experiment assessed the diffusion, lability, and solubility of P from granular (calcium phosphate and ammonium phosphate) and fluid (ammonium phosphate and polyphosphate) fertilizers in two Andisols and two Oxisols. A calcareous Inceptisol and an Alfisol were included for comparison. Phosphorus diffusion and lability was assessed using a novel visualization technique and isotopic exchange (24-h equilibration), and residual fertilizer granules were analyzed at the end of the incubation. Most P (90%) diffused out of the granules, except for calcium phosphate fertilizers in the calcareous soil. In the strongly P-sorbing soils (acidic and calcareous), P applied in fluid form diffused further from the application point compared with granular P. However, in the Andisols and Oxisols, the greater diffusion did not result in greater P lability and solubility; more P remained labile with the granular (34% on average) than with the fluid fertilizer (24%). In contrast, in the calcareous soil, the application of fluid P resulted in enhanced P lability and solubility. These results suggest that in Andisols and Oxisols, where strong adsorption rather than precipitation reactions limit fertilizer P availability, spreading the fertilizer over a larger soil volume by using fluid formulations may reduce P lability. No agronomic benefit over granular products is expected from the use of fluid P fertilizers in these soil types. | - |
dc.description.statementofresponsibility | Daniela Montalvo, Fien Degryse, Mike J. McLaughlin | - |
dc.language.iso | en | - |
dc.publisher | Soil Science Society of America | - |
dc.rights | © Soil Science Society of America | - |
dc.source.uri | http://dx.doi.org/10.2136/sssaj2013.02.0075 | - |
dc.title | Fluid fertilizers improve phosphorus diffusion but not lability in andisols and oxisols | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.2136/sssaj2013.02.0075 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Degryse, F. [0000-0002-4875-2944] | - |
dc.identifier.orcid | McLaughlin, M. [0000-0001-6796-4144] | - |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 3 |
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