Hybrid brown coal-urea fertiliser reduces nitrogen loss compared to urea alone

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dc.contributor.authorSaha, B.
dc.contributor.authorRose, M.
dc.contributor.authorWong, V.
dc.contributor.authorCavagnaro, T.
dc.contributor.authorPatti, A.
dc.date.issued2017
dc.description.abstractSynthetic nitrogen (N) fertilisers, such as urea, are susceptible to rapid dissipation from soil. More gradual release of mineral N from fertiliser may reduce the off-site movement of mineral N, thereby enhancing N supply to crops and minimising negative off-site impacts. We hypothesised that granulation of urea with humified brown coal (BC) delays mineral N release and maintains higher concentrations of N in soil than conventional urea granules. Four different brown coal-urea granules, with C:N ratios of 1‐10, were prepared by pan granulation. Advanced spectroscopic and X-ray powder diffraction (XRD) techniques confirmed loading of urea-N into the BC structure. Nitrogen-release from BCU granules was slower than from urea, resulting in higher N retention over a longer period for increasing growth and N uptake by crop plants. This trend increased with higher loading of BC, emphasising the significant role of BC in N retention. These findings support the hypothesis that BC is suitable for developing slow release N fertilisers.
dc.description.statementofresponsibilityBiplob K. Saha, Michael T. Rose, Vanessa Wong, Timothy R. Cavagnaro, Antonio F. Patti
dc.identifier.citationScience of the Total Environment, 2017; 601-602:1496-1504
dc.identifier.doi10.1016/j.scitotenv.2017.05.270
dc.identifier.issn0048-9697
dc.identifier.issn1879-1026
dc.identifier.orcidCavagnaro, T. [0000-0002-9922-5677]
dc.identifier.urihttp://hdl.handle.net/2440/110450
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/FT120100463
dc.rights© 2017 Elsevier B.V. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.scitotenv.2017.05.270
dc.subjectBrown coal
dc.subjectFertiliser N use efficiency
dc.subjectPan granulation
dc.subjectSlow release fertiliser
dc.subjectUrea
dc.titleHybrid brown coal-urea fertiliser reduces nitrogen loss compared to urea alone
dc.typeJournal article
pubs.publication-statusPublished

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