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Acta Prataculturae Sinica ›› 2012, Vol. 21 ›› Issue (2): 205-211.

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Relationship of stable carbon isotope concentration in diet and tissues of beef cattle

SUN Feng-mei1, 2, WANG Hui-wen3, SHI Guang-yu1, YANG Shu-ming2   

  1. 1.Department of Food Science, Hebei North University, Zhangjiakou 075131, China;
    2.Institute of Quality Standard and Testing Technology for Agro-Product, Chinese Academy of Agricultural Science, Beijing 100081, China;
    3.Department of Animal Husbandry and Engineering, Hebei North University, Zhangjiakou 075131, China
  • Received:2011-01-10 Online:2012-02-25 Published:2012-04-20

Abstract: The effect of quantity of C3 or C4 plants in diets on the carbon (δ13C) stable isotope composition of different types of beef tissues were investigated. Eighteen (12 to 14 months old) young bulls were randomly divided into six groups and fed with a diet consisting of 52.0%,61.6%,71.2%,80.8%,90.4%,or 100% C4 plant material. The remainder of the dietary constituents was from C3 plants. The cattle were butchered after 132 days. The δ13C values of cattle tail hair, defatted muscle, crude fat and each feed material were determined by isotope ratio mass spectrometry (IRMS). The stable carbon isotope compositions of the beef tissues were primarily affected by diet, and the difference of δ13C value of cattle tail hair fed on the same diet decreased with time. The δ13C values of cattle tail hair, defatted muscle and crude fat all become enriched with increasing proportions of C4 constituents in the diet. Moreover, all δ13C values of the different tissues (cattle tail hair>defatted muscle>crude fat) were significantly correlated with the content of C4 plant material. Based on these results, it is possible for the proportion of C4 plant material to be estimated from the δ13C values of the different tissue samples, thus the cattle tail hair, defatted muscle and crude fat can all be used to trace back to diet.

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