Agronomic effectiveness of granulated and powdered P-exchanged Mg-Al LDH relative to struvite and MAP

Simple item page
dc.contributor.authorEveraert, M.
dc.contributor.authorDegryse, F.
dc.contributor.authorMcLaughlin, M.J.
dc.contributor.authorDe Vos, D.
dc.contributor.authorSmolders, E.
dc.date.issued2017
dc.description.abstractLayered double hydroxides (LDHs) used to recover P from wastewater have recently been proposed as new slow-release fertilizers. Here, the use of P-exchanged Mg-Al LDHs as powdered or granulated fertilizer is explored and compared with monoammonium phosphate (MAP), a fully water-soluble fertilizer, and with struvite, a recycled phosphate fertilizer with lower solubility. First, these three fertilizers were compared in a 100-day incubation experiment using P diffusion visualization and chemical analysis to assess P release from either granules or powdered fertilizer in three different soils. By the end of the incubation, 74-90% of P remained within the LDH granule, confirming a slow release. Second, a pot experiment was performed with wheat (Triticum aestivum) in an acid and a calcareous soil. The granular treatment resulted in a considerably higher P uptake for MAP compared to LDH and struvite. For the powder treatments, the P uptake was less than for granular MAP and was largely unaffected by the chemical form. The LDHs and struvite showed a lower agronomic effectiveness than granular MAP, but the benefits of their use in P recycling, potential residual value, and environmental benefits may render these slow-release fertilizers attractive.
dc.description.statementofresponsibilityMaarten Everaert, Fien Degryse, Mike J. McLaughlin, Dirk De Vos, and Erik Smolders
dc.identifier.citationJournal of Agricultural and Food Chemistry, 2017; 65(32):6736-6744
dc.identifier.doi10.1021/acs.jafc.7b01031
dc.identifier.issn0021-8561
dc.identifier.issn1520-5118
dc.identifier.orcidDegryse, F. [0000-0002-4875-2944]
dc.identifier.orcidMcLaughlin, M.J. [0000-0001-6796-4144]
dc.identifier.urihttp://hdl.handle.net/2440/117314
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.rights© 2017 American Chemical Society
dc.source.urihttps://doi.org/10.1021/acs.jafc.7b01031
dc.subjectAgronomic effectiveness; fertilizer granulation; layered double hydroxides; phosphorus; slow-release fertilizer; struvite
dc.titleAgronomic effectiveness of granulated and powdered P-exchanged Mg-Al LDH relative to struvite and MAP
dc.typeJournal article
pubs.publication-statusPublished

Files

Collections

Agriculture, Food and Wine publications