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| Mineral Fingerprint Characteristics of Pasture-fed and Barn-fed Beef in Inner Mongolia |
| BAI Yang, LUO Shuai, WANG Qian, DU Quan, GUO Jun, 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 80 samples of Biceps femoris and Longissimus dorsi muscles of pasture-fed and barn-fed cattle were collected from 8 banners/counties distributing from east to west in Inner Mongolia for the determination of 27 mineral elements, and principal component analysis (PCA) and descriptive statistics analysis were conducted on the data obtained. Results indicated cluster analysis showed better performance in discriminating among feeding systems than among regions despite consistent trends. Pasture-fed and barn-fed beef samples from different regions were clustered. Further analysis demonstrated that good separation was achieved between the pastures of Hulunbuir and Xilingol. Barn-fed beef samples from Horqin Left Wing Rear Banner, Zhenglan Banner, the Southern suburb of Hohhot and Uxin Banner were clustered separately. A tendency of separation between Biceps femoris and Longissimus dorsi samples was found despite a partial overlap. In paired analysis of variance (ANOVA) and paired t-test, no significant differences in the minerals were observed between feeding systems, geographical origins, and muscles, indicating that the conventional statistics is not sensitive to differences in minerals. The contents of K, Mg, P, Mo, Mn, Cd, Li, Sr, Ag, Ba and Tl in pasture-fed beef were significantly higher than those in barn-fed beef, while the contents of Zn, Se, Co, Rb and Cs in barn-fed beef were significantly higher than those in pasture-fed beef. The content of Se in barn-fed beef was 2.1 times higher than that in pasture-fed beef, and it showed an increasing trend from east to west in Inner Mongolia.
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2021, Vol. 35 
