Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/97216
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Fluid fertilizers improve phosphorus diffusion but not lability in andisols and oxisols |
Author: | Montalvo, D. Degryse, F. McLaughlin, M. |
Citation: | Soil Science Society of America Journal, 2014; 78(1):214-224 |
Publisher: | Soil Science Society of America |
Issue Date: | 2014 |
ISSN: | 0361-5995 1435-0661 |
Statement of Responsibility: | Daniela Montalvo, Fien Degryse, Mike J. McLaughlin |
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. |
Rights: | © Soil Science Society of America |
DOI: | 10.2136/sssaj2013.02.0075 |
Published version: | http://dx.doi.org/10.2136/sssaj2013.02.0075 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 3 |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.