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Abstract：
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.
摘要：
有机作物生产已成为世界上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，以区分有机和常规种植的菊苣。菊苣是生产者和消费者赞赏的叶类蔬菜，特别是由于其对生物活性物质的培养和含量要求不高。六种不同的生育管理做法(控制，两个有机的，两种矿物，以及有机和矿物肥料的组合）在温室盆栽实验中用于生产五个菊苣品种。生物活性化合物的分析，氮同化，碳（C）的多元素分析和稳定同位素比测定，进行氮（N）和硫（S）以区分有机和常规生产。在这项研究中,发现氮同位素是鉴定具有最高δ15N值的不同品种的有机菊苣的极好方法。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鉴定有机生产的标记。
