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Nitrogen Isotopes as a Screening Tool To Determine the Growing Regimen of Some Organic and Nonorganic Supermarket Produce from New Zealand
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Abstract
An isotopic study was performed on nine varieties of organically and conventionally grown vegetables from an organic food market and a chain supermarket in New Zealand. The main aim of the study was to assess the applicability of stable nitrogen isotopes as a screening tool to differentiate between organic and conventional growing conditions of various vegetable types sampled directly off supermarket shelves. This could be further used as the basis of a simple authentication tool to detect noncompliant organic farming practices and false labeling of organic produce. In this study, nitrogen isotopes are found to be an excellent way of identifying faster growing organic vegetables (maturity time to harvest of <80 days), as these vegetables tend to be significantly more enriched in 15N than conventionally grown vegetables and natural soil N. For slower growing organic produce (maturity time to harvest of >80 days), more information would be required to understand isotopic variations and fractionation effects between vegetables and soil over time as the technique does not discriminate organic from conventional regimens for these vegetables with as much certainty.
Keywords:
Nitrogen; isotope; organic; manure; fertilizer; vegetable; carbon; δ15N; δ13CCiting Articles
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This article has been cited by 2 ACS Journal articles (2 most recent appear below).
Influence of Different Organic Fertilizers on Quality Parameters and the δ15N, δ13C, δ2H, δ34S, and δ18O Values of Orange Fruit (Citrus sinensis L. Osbeck)
Paolo Rapisarda, Federica Camin, Simona Fabroni, Matteo Perini, Biagio Torrisi and Francesco IntriglioloJournal of Agricultural and Food Chemistry2010 58 (6), 3502-3506Influence of Different Organic Fertilizers on Quality Parameters and the δ15N, δ13C, δ2H, δ34S, and δ18O Values of Orange Fruit (Citrus sinensis L. Osbeck)
Paolo Rapisarda, Federica Camin, Simona Fabroni, Matteo Perini, Biagio Torrisi and Francesco IntriglioloJournal of Agricultural and Food Chemistry2010 58 (6), 3502-3506To investigate the influence of different types of fertilizers on quality parameters, N-containing compounds, and the δ15N, δ13C, δ2H, δ 34S, and δ18O values of citrus fruit, a study was performed on the orange fruit cv. ‘Valencia late’ (Citrus sinensis ...
Stable Isotopes as a Tool To Differentiate Eggs Laid by Caged, Barn, Free Range, and Organic Hens
Karyne M. RogersJournal of Agricultural and Food Chemistry2009 57 (10), 4236-4242Stable Isotopes as a Tool To Differentiate Eggs Laid by Caged, Barn, Free Range, and Organic Hens
Karyne M. RogersJournal of Agricultural and Food Chemistry2009 57 (10), 4236-4242Stable carbon and nitrogen isotope values of whole yolk, delipidized yolk, albumen, and egg membrane were analyzed from 18 different brands of chicken eggs laid under caged, barn, free range, and organic farming regimes. In general, free range and organic ...
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History
- Published In Issue June 11, 2008
- Article ASAPMay 20, 2008
- Received: March 17, 2008
Accepted: March 27, 2008
Revised: March 25, 2008
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