Iron-rich sand promoted nitrate reduction in a study for testing of lignite based new slow-release fertilisers

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dc.citation.volume864
dc.contributor.authorAbhiram G
dc.contributor.authorGrafton M
dc.contributor.authorJeyakumar P
dc.contributor.authorBishop P
dc.contributor.authorDavies C
dc.contributor.authorMcCurdy MM
dc.coverage.spatialNetherlands
dc.date.available2023-03-15
dc.date.available2022-12-11
dc.date.issued20/12/2022
dc.descriptionCAUL read and publish agreement 2022
dc.description.abstractThe N losses and agronomic performances of newly developed slow-releasing fertilisers (SRFs; Epox5 and Poly5) were tested against conventional N fertilisers, urea and diammonium phosphate (DAP), in a climate-controlled lysimeter system. The dry matter (DM) yield and N losses of SRFs were not significantly different from urea and DAP. However, nitrate leaching and nitrous oxide (N2O) losses were unexpectedly low and therefore, it was inferred that nitrate underwent a chemical transformation. It was observed that a thick fibreglass wick interrupted drainage and created an anaerobic condition in the soil. The subsoil was found to have a high extractable total iron and it was postulated that iron played a role in the observed low level of N losses. An investigation was carried out with a factorial design using sand types and rates of N application as the main factors. Two types of sand; with high and low iron concentration and four levels of N applications; 0 (control), 50, 100 and 200 kg N ha-1 were employed in a leaching column and nitrate and N2O losses were measured. The nitrate leaching was significantly (P < 0.05) affected by sand types wherein a lower nitrate level was recorded for high‑iron concentration sand than for low-iron concentration sand at all N application levels. The N2O emission was significantly (P < 0.05) lower for high-iron sand than for low-iron sand for the 200 N treatment, but not significantly different between sand types for other treatments. These observations provide evidence for the involvement of iron in nitrate transformation under anaerobic conditions and it was hypothesised path was dissimilar nitrate reduction (DNR). Further studies are recommended, to identify the underlying mechanism responsible for nitrate reduction with iron-rich sand.
dc.description.publication-statusPublished
dc.format.extent160949 - ?
dc.identifierhttps://www.ncbi.nlm.nih.gov/pubmed/36549131
dc.identifierS0048-9697(22)08052-4
dc.identifier.citationSci Total Environ, 2023, 864 pp. 160949 - ?
dc.identifier.doi10.1016/j.scitotenv.2022.160949
dc.identifier.eissn1879-1026
dc.identifier.elements-id458595
dc.identifier.harvestedMassey_Dark
dc.identifier.urihttps://hdl.handle.net/10179/17934
dc.languageeng
dc.publisherElsevier
dc.relation.isPartOfSci Total Environ
dc.relation.urihttps://reader.elsevier.com/reader/sd/pii/S0048969722080524?token=9C6586F22DD46786CB03893B2D1719EE7B445D6F77483E648909B70E3A090A4C17A750C887C4B9DD7EAA9F5E8EBAB392&originRegion=us-east-1&originCreation=20221220222025
dc.subjectDissimilar nitrate reduction
dc.subjectIron-rich sand
dc.subjectNitrate leaching
dc.subjectNitrogen use efficiency
dc.subjectNitrous oxide emission
dc.subjectSlow-release fertiliser
dc.titleIron-rich sand promoted nitrate reduction in a study for testing of lignite based new slow-release fertilisers
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
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