Organic crop production has become a highly attractive way of production over the world and thus the need for robust analytical techniques for their authentication. The main aim of this study is to identify appropriate biomarkers to discriminate between organic and conventionally grown chicory. Chicory is an appreciated leafy vegetable among producers and consumers, especially due to its undemanding cultivation and content of bioactive substances. Six different fertility management practices (control, two organic, two mineral, and a combination of organic and mineral fertilizers) were used to produce five chicory cultivars in a glasshouse pot experiment. Analysis of bioactive compounds, nitrogen assimilation, multi-elemental profiling and stable isotope ratio determination of carbon (C), nitrogen (N) and sulphur (S) were performed to differentiate between organic and conventional production. In this study, nitrogen isotopes are found to be an excellent way of identifying organically produced chicory of a different variety with the highest δ15N values. Conversely, the same samples had the lowest δ34S values indicating that also stable isotopes of S could be used as a marker for the authentication of organic production.

中文翻译：

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区分有机生产和传统生产的参数：菊苣植物 (Cichorium intybus L.) 的案例研究。


有机作物生产已成为世界范围内极具吸引力的生产方式，因此需要强大的分析技术来进行认证。这项研究的主要目的是确定适当的生物标志物来区分有机和传统种植的菊苣。菊苣是一种深受生产者和消费者喜爱的叶类蔬菜，特别是由于其栽培要求不高且含有生物活性物质。在温室盆栽实验中，采用六种不同的肥力管理措施（对照、两种有机肥料、两种矿物肥料以及有机和矿物肥料的组合）来生产五种菊苣品种。通过生物活性化合物分析、氮同化、多元素分析以及碳 (C)、氮 (N) 和硫 (S) 的稳定同位素比测定来区分有机生产和常规生产。在这项研究中，发现氮同位素是识别具有最高 δ15N 值的不同品种的有机生产菊苣的极好方法。相反，相同的样品具有最低的 δ34S 值，表明 S 的稳定同位素也可以用作有机生产认证的标记。