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| Measurement and Evaluation of Selenium in Beef and Sheep Meat in Inner Mongolia |
| LUO Shuai, GUO Jun, Lü Jiao, DU Quan, SUN Haizhou |
| 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 |
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Abstract A total of 124 beef samples from grazing, semi-barn-fed and barn-fed cattle and 49 mutton samples from grazing sheep in 12 banners and counties distributing from east to west in Inner Mongolia were collected for determining selenium (Se) levels by atomic fluorescence spectroscopy (AFS). Descriptive statistical analysis and comparative analysis were carried out on the data obtained. Results showed that Se levels of beef and mutton in Inner Mongolia exhibited significant regional characteristics, increasing from east to west. However, Se levels of beef and sheep meat did not significantly differ between the middle to middle-eastern regions. Se content of beef in Uxin Banner was about 3 times higher than that in Xin Barag Left Banner, (12.04 ± 0.84) versus (3.01 ± 1.34) μg/100 g. Se content of mutton in Hanggin Rear Banner was approximately 2 times higher than that in Ewenki Banner, (4.23 ± 0.82) versus (1.41 ± 0.57) μg/100 g. The distribution of Se contents in grazing sheep meat was concentrated with significant regional characteristics, while the distribution of Se contents in beef was scattered, implying that feeding systems have a significant impact on selenium level. Se content of beef was 1.8 times higher than that of sheep, (6.23 ± 2.63) versus (2.24 ± 1.14) μg/100 g. Overall, Se levels of beef from barn-fed cattle, (8.71 ± 2.90) μg/100 g, and from semi-barn fed cattle, (6.41 ± 2.17) μg/100 g, were higher than that of beef from grazing cattle, (5.10 ± 1.80) μg/100 g for each region. The regional variability of Se contents in beef and mutton may be related to both the crustal abundance of selenium and feeding factors.
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2020, Vol. 34 
