食品科学

• 基础研究 • 上一篇    下一篇

生鲜乳质量变化规律及其影响因素

孙 涛,尹京苑,韩奕奕,孟 瑾,吴任绮,高海燕   

  1. 1.上海大学生命科学学院,上海 200444;2.上海大学计算机工程与科学学院,上海 200072;
    3.上海市乳品质量监督检验站,上海 200436
  • 出版日期:2013-06-15 发布日期:2013-06-03

Variations and Influencing Factors of Raw Milk Quality

SUN Tao,YIN Jing-yuan,HAN Yi-yi,MENG Jin,WU Ren-qi,GAO Hai-yan   

  1. 1. School of Life Sciences, Shanghai University, Shanghai 200444, China;
    2. School of Computer Engineering and Science, Shanghai University, Shanghai 200072, China;
    3. Shanghai Dairy Quality Supervision and Inspection Station, Shanghai 200436, China
  • Online:2013-06-15 Published:2013-06-03

摘要:

以2009年上海市及周边地区牧场的生鲜乳为研究对象,利用相关分析、通径分析、多元回归分析等方法,对上海地区生鲜乳质量的变化规律和影响因素进行研究。结果表明:生鲜乳中体细胞含量、菌落总数的变化显著;脂肪含量与蛋白质含量、蛋白质含量与冰点、菌落总数与平均温度间呈极显著正相关,而体细胞含量和平均温度间呈极显著负相关。同时建立了生鲜乳菌落总数(Y)与平均温度(X1)、脂肪含量(X2)、蛋白质含量(X3)、平均湿度(X4)的回归模型:Y=7.592+0.465X1-4.029X2-3.494X3-0.182X4。

关键词: 生鲜乳, 质量变化, 相关分析, 多元回归分析

Abstract:

The quality changes and influencing factors of raw milk in and around Shanghai were studied by applying
correlation analysis, path analysis and multiple regression analysis. For this study, raw milk samples were collected from
local pastures almost over the whole year of 2009. The results showed that the changes of somatic cell count and aerobic
plate count in raw milk were significant. There was a significant positive corrleation between fat content and protein
content or freezing point, between protein content and freezing point or somatic cell count, and between aerobic plate
count and somatic cell count or average air temperature, whereas somatic cell count was very significantly negatively
correlated with average air temperature. At the same time, a regression model was established indicating aerobic plate
count (Y) versus temperature (X1), fat content (X2), protein content (X3) and average air humidity: Y = 7.592 + 0.465X1 -
4.029X2 - 3.494X3 - 0.182X4.

Key words: raw milk, quality change, correlation analysis, multiple regression analysis