甘南牦牛乳成分与环境因子相关性分析OA

[Objective]Through correlation analysis,to reveal the correlations between proteins,non-fat milk solids,IgA,IgM,conjugated linoleic acid in yak milk from Tibetan Autonomous Prefecture of Gannan,Gansu Province(referred to as"Gan Nan Prefecture")and the altitude,temperature,and precipitation of the region.[Method]The contents of protein,non-fat milk solids,IgA,IgM,and conjugated linoleic acid in yak milk in regions of Gonghe City in 2023,Maqu County,Luqu County,Xiahe County and Zhuoni County in Gan Nan Prefecture were determined.[Result]The average protein content in yak milk in 5 regions of Gannan Prefecture was 4.45%,the average non-fat milk solids was 10.49%,the average content of IgA was 2.044 μg/ml,the average content of IgM was 17.129 μg/ml,and the average content of conjugated linoleic acid was 1.326 mg/g.[Conclusion]The protein and non-fat milk solids content in the yak milk from Gannan Prefecture were significantly negatively correlated with the average maximum temperature in August and the annual average low temperature;the IgA content was significantly positively correlated with the annual average low temperature;the IgM and conjugated linoleic acid contents were significantly negatively correlated with the total precipitation in August and the annual total precipitation respectively.The results of this study can provide a reference for future research on the relationship between environmental factors and yak milk quality.