Quantification of nitrate-N losses under intensive vegetable production systems in New Zealand

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dc.citation.volumeLatest Articles
dc.contributor.authorAvendaño F
dc.contributor.authorHorne D
dc.contributor.authorSingh R
dc.contributor.authorPalmer A
dc.contributor.authorCichota R
dc.contributor.authorBloomer D
dc.date.accessioned2025-07-16T03:00:34Z
dc.date.available2025-07-16T03:00:34Z
dc.date.issued2025-07-03
dc.description.abstractNitrogen leaching under intensive vegetable production is a major concern in New Zealand, yet measurements remain scarce. The main aim of this study was to quantify the amount of nitrate-N leached from representative soils and vegetable crops of the Lower North Island of New Zealand. Nitrate-N concentrations in soil and drainage losses were measured from 2020 to 2022 at two vegetable crop sites. One site had a potato-fallow rotation with six N fertiliser treatments: control, standard practice, split liquid, controlled release, good practice, and excess fertiliser. The second site, a lysimeter study, evaluated a beetroot-Pak choi rotation under similar treatments, including a reduced rate and chicken manure. High nitrate-N concentrations were observed in topsoil (9.3–18.3 mg kg−1), subsoil (7.3–9.6 mg kg−1), and drainage water (33.8–61.9 mg L−1), with leaching losses reaching 225 kg N ha−1, particularly during fallow periods. Alternative fertiliser strategies reduced soil nitrate-N but did not consistently maintain or increase yields. Excess fertilisation did not significantly increase potato yields but greatly increased nitrate-N losses. This study provides essential data on soil nitrate-N concentration and leaching from intensive vegetable farms.
dc.description.confidentialfalse
dc.format.pagination1-22
dc.identifier.citationAvendaño F, Horne D, Singh R, Palmer A, Cichota R, Bloomer D. (2025). Quantification of nitrate-N losses under intensive vegetable production systems in New Zealand. New Zealand Journal of Crop and Horticultural Science. Latest Articles. (pp. 1-22).
dc.identifier.doi10.1080/01140671.2025.2526836
dc.identifier.eissn1175-8783
dc.identifier.elements-typejournal-article
dc.identifier.issn0114-0671
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/73193
dc.languageEnglish
dc.publisherTaylor and Francis Group on behalf of the Royal Society of New Zealand
dc.publisher.urihttps://www.tandfonline.com/doi/full/10.1080/01140671.2025.2526836
dc.relation.isPartOfNew Zealand Journal of Crop and Horticultural Science
dc.rights(c) 2025 The Author/s
dc.rightsCC BY-NC-ND 4.0
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectNitrate-N losses
dc.subjectvegetable farming
dc.subjectdiffuse pollution
dc.subjectwater quality
dc.subjectcrop rotations
dc.titleQuantification of nitrate-N losses under intensive vegetable production systems in New Zealand
dc.typeJournal article
pubs.elements-id501500
pubs.organisational-groupOther
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