Institute of Quality Standard & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agro-product Quality and Safety, Ministry of Agriculture, Beijing 100081, China.
Institute of Quality Standard & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agro-product Quality and Safety, Ministry of Agriculture, Beijing 100081, China.
Meat Sci. 2016 Aug;118:103-7. doi: 10.1016/j.meatsci.2016.03.030. Epub 2016 Apr 6.
Dietary composition and rearing regime largely determine the trace elemental composition of pigs, and consequently their concentration in animal products. The present study evaluates thirteen macro- and trace element concentrations in pork from organic and conventional farms. Conventional pigs were given a commercial feed with added minerals; organic pigs were given a feed based on organic feedstuffs. The content of macro-elements (Na, K, Mg and Ca) and some trace elements (Ni, Fe, Zn and Sr) in organic and conventional meat samples showed no significant differences (P>0.05). Several trace element concentrations in organic pork were significantly higher (P<0.05) compared to conventional pork: Cr (808 and 500μg/kg in organic and conventional pork, respectively), Mn (695 and 473μg/kg) and Cu (1.80 and 1.49mg/kg). The results showed considerable differences in mineral content between samples from pigs reared in organic and conventional systems. Our results also indicate that authentication of organic pork can be realized by applying multivariate chemometric methods such as discriminant analysis to this multi-element data.
饮食组成和饲养方式在很大程度上决定了猪体内的微量元素组成，进而决定了其在动物产品中的浓度。本研究评估了来自有机农场和常规农场的猪肉中的 13 种宏量和微量元素的浓度。常规猪使用添加矿物质的商业饲料；而有机猪使用基于有机饲料的饲料。有机和常规肉样中的常量元素（Na、K、Mg 和 Ca）和一些微量元素（Ni、Fe、Zn 和 Sr）的含量没有显著差异（P>0.05）。与常规猪肉相比，有机猪肉中的几种微量元素浓度显著更高（P<0.05）：Cr（分别为 808 和 500μg/kg）、Mn（分别为 695 和 473μg/kg）和 Cu（分别为 1.80 和 1.49mg/kg）。结果表明，有机和常规饲养系统的猪肉样本在矿物质含量上存在明显差异。我们的结果还表明，可以通过应用多元化学计量方法（如判别分析）对这种多元素数据进行分析，从而实现对有机猪肉的认证。
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