Comparative Analysis Yak Milk from Different of Nutrient Components of Regions

摘要

[Objective] To analyze the nutrient components of yak milk from different regions and provide a theoretical basis for further development and utilization of yak milk.[Method] A total of 150 yak milk samples were collected from Tianzhu County,Maqu County and Tianjun County,and 90 yak milk samples were collected from three different yak farms in Tianzhu County.The content of milk protein,milk fat,fat solid,non-fat solid and lactose,as well as the density,freezing point and acidity were determined,respectively.[Result] The milk protein content and milk fat content had significant differences between three regions.With the increasing altitude,the milk protein and milk fat were increased,but the content of fat solid,non-fat solid and lactose,density,freezing point and acidity had no obviously regular change.The milk protein content and milk fat content had no significant difference between three yak farms in Tianzhu County.[Conclusion] The altitude may affect the milk protein content and milk fat content of yak milk.