›› 2018, Vol. 45 ›› Issue (10): 2969-2975.doi: 10.16431/j.cnki.1671-7236.2018.10.036

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Comparison of Amino Acid Content and Regional Difference in the Raw Milk of Inner Mongolia

SONG Jie, ZHANG Sanfen, FENG Xiaohui, DU Lin, SHI Pei, WANG Lifang, YAO Yipin   

  1. Laboratory of Quality & Safety Risk Assessment for Agricultural Products, Ministry of Agriculture, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot 010031, China
  • Received:2018-04-12 Online:2018-10-20 Published:2018-10-20

Abstract:

The purpose of this experiment was to compare the amino acid content,nutritional value of milk protein and regional difference in the raw milk of Inner Mongolia,so as to provide a theoretical basis for the quality evaluation of raw milk.70 milk samples were selected from milk storage tank with the similar season in Hulunbuir,Xilinguole Meng,Wulanchabu,Chifeng,Hohhot,Xing'an Meng and Tongliao,to measure the content of 17 amino acids in the raw milk of Inner Mongolia,and evaluate the nutritional value of milk protein according to the latest amino acid score recommended by FAO (2011),meanwhile compare the regional difference.The results showed that the total amount of 17 amino acids in Inner Mongolia raw milk was 3.117%,the content of glutamic acid was the highest (0.593%),followed by proline,leucine and lysine,glycine (0.060%) and cystine (0.061%) were the lowest.The proportion of essential amino acids (EAA) and amino acid score in raw milk of Inner Mongolia were higher than that of FAO/WHO ideal protein standard and ideal protein pattern.The content of amino acids in milk of different regions of Inner Mongolia were quite different.Compared with the amino acids content in the milk of Chifeng,the content of EAA,non essential amino acids (NEAA) and total amino acids (TAA) in Xilinguole Meng milk were significantly higher (P < 0.05),the content of valine,lysine,histidine,glycine and alanine were higher in Hulunbuir (P < 0.05).The content of leucine,lysine,histidine,alanine,aspartic acid and tyrosine in Hohhot were relatively higher (P < 0.05),the differences in other regions were not significantly (P > 0.05).It was concluded that the protein of raw milk from Inner Mongolia had high quality,and the amino acid nutritional value of Xilinguole Meng,Hulun Buir and Hohhot were better.

Key words: Inner Mongolia; cow; raw milk; amino acid; regional differences

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