Animal Husbandry and Feed Science ›› 2020, Vol. 41 ›› Issue (2): 78-86.doi: 10.12160/j.issn.1672-5190.2020.02.015

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Determination of Chromaticity of Beef and Mutton Originated from Some Areas of Inner Mongolia

LUO Shuai1, GUO Jun1, SUN Hai-zhou2, LIU Meng-jing1   

  1. 1.College of Food Science and Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;
    2.Institute of Animal Nutrition and Feed,Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China
  • Received:2020-02-07 Online:2020-02-29 Published:2020-04-10

Abstract: [Objective] To investigate the chromaticity parameters of beef and mutton produced in Inner Mongolia, and to evaluate the feasibility of using chromaticity value modeling to distinguish the beef produced in free-grazing or confined condition and the geographic origin of mutton produced in free-grazing condition. [Method] A total of 39 beef samples produced in free-grazing condition and 14 beef samples produced in confined condition were collected from Ewenki Autonomous Banner and Hohhot City of Inner Mongolia, respectively, and a total of 117 mutton samples produced in free-grazing condition were collected from different geographic regions of Inner Mongolia, including Ewenki Autonomous Banner, New Barag Left Banner, New Barag Right Banner, Abag Banner and Sonid Left Banner, were also collected. The chromaticity parameters of biceps brachii, longissimus dorsi muscle and fat of the collected beef and mutton samples were measured using a Hunter Lab colorimeter, and a difference test and principal component analysis (PCA) were performed. [Result] The a* value (15.93±0.75) of the longissimus dorsi muscle of beef produced in free-grazing condition in Ewenki Autonomous Banner was significantly (P<0.01) higher than that produced in confined condition in Hohhot (12.81±0.84), and the former had darker color; the fat b* value of beef produced in free-grazing condition (27.86±1.55) was 3.1 times as high as the beef produced in confined condition (8.94±0.57), and the former showed lemon yellow to orange yellow in color; for beef, PCA analysis demonstrated a significant clustering separation between the two different feeding condition. For the mutton sampled from the above five banners, the a* and b* values of the biceps brachii (18.14±0.64 and 9.02±1.22) was higher than those of the longissimus dorsi muscle (17.00±0.78 and 8.14±1.71), respectively, and significant differences were observed (P<0.05); the chromaticity parameters of mutton samples collected from Abag Banner was significantly different from those of the samples collected from the other banners, and PCA analysis demonstrated that the chromaticity parameters of mutton collected from Abag Banner formed an independent cluster apart from those of the mutton originated from the other banners; there were differences in fat chromaticity parameters of mutton collected from the above five banners, which could be used to identify the geographic origin of sheep. [Conclusion] It is feasible to use the model with muscle and fat chromaticity parameters to distinguish beef produced in free-grazing or confined condition, and to employ the model with fat chromaticity parameters to differentiate the geographic origin of mutton. Establishing the color standards for beef produced in free-grazing and confined condition and for mutton with different geographic origin in Inner Mongolia is conductive to the featured beef and mutton industry in Inner Mongolia, especially the brand development of beef and mutton produced in free-grazing condition. However, the establishment of relevant standards requires more systematic and detailed detection and analysis.

Key words: chromaticity, beef, mutton, free-grazing, confinement feeding, Inner Mongolia

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