市售有机和非有机蔬菜的稳定同位素分析  

Stable isotope analysis of commercially available organic and non-organic vegetables

作　　者：陶俊良 隆宇翀 连文高 李兆星 TAO Junliang;LONG Yuchong;LIAN Wengao;LI Zhaoxing(School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学环境科学与工程学院,上海200240 [2]上海交通大学农业与生物学院,上海200240

出　　处：《生态学杂志》2025年第1期337-343,共7页Chinese Journal of Ecology

基　　金：第二十四期“上海交通大学大学生创新实践计划”项目(IPP24196)资助。

摘　　要：为区分有机种植的蔬菜和非有机种植的蔬菜,从多种渠道(实体超市、电商平台、外卖平台、种植基地)获得了17种蔬菜的19个非有机样品和34个有机样品,测试其稳定碳、氮同位素组成(δ13C、δ15N)。结果表明:δ13C在有机样品和非有机样品之间没有显著差别,有机样品δ15N显著高于非有机样品,δ15N对不同蔬菜种类的区分效果不同。基于双同位素(δ13C、δ15N)的模糊C均值聚类表明,有44.45%的非有机样品和15.14%的有机样品聚类结果与市场标注一致;21.22%的市场标注有机产品被识别为聚类非有机;没有市场标注非有机样品被划入聚类有机;其余样品均被识别为聚类过渡产品。本研究中有机和非有机蔬菜样品δ15N比其他研究中的更高。施肥习惯的不同可能造成了这一结果。这说明应用δ15N方法识别有机蔬菜时,应充分考虑地区差异。To distinguish organic vegetables from non-organic ones,we analyzed the stable carbon and nitrogen isotope compositions(δ13C and δ15N)of 19 non-organic and 34 organic samples of 17 categories of vegetables collected from various sources(physical retailers,e-commerce platforms,takeaway platforms,farming base).The results showed that there was no significant difference of δ13C between organic and non-organic samples,while δ15N was significantly higher in the organic samples.The effectiveness of δ15N varied in different vegetable categories.The fussy C-means clustering based on dual isotope compositions(δ13C and δ15N)showed that 44.45%of non-organic samples and 15.14%of organic samples were consistent with the market labeling.21.22% of market-labeled organic products were identified as clustered non-organic.No market-labeled non-organic samples were classified as clustered organic.The rest of the samples were classified as transitional products.The δ15N of both organic and non-organic samples in this study was higher than that in other studies,possibly due to different fertilizing habits,which suggests that regional difference should be fully considered when using δ15N methods.

关 键 词：有机蔬菜 稳定同位素 模糊C均值聚类 

分 类 号：S63[农业科学—蔬菜学]