不同泌乳期绵羊乳理化指标与酸度变化关联度  

Correlation between Physicochemical Indexes and Acidity of Sheep Milk in Different Lactation Periods

作　　者：沈雨菲 张艳 同芬芬 王爽爽 胡启胜 徐立清 宋宇轩[5] 葛武鹏[1] SHEN Yufei;ZHANG Yan;TONG Fenfen;WANG Shuangshuang;HU Qisheng;XU Liqing;SONG Yuxuan;GE Wupeng(College of Food Science and Engineering,Northwest A&F University,Yangling 712100,China;Fuping County Inspection and Testing Center(Shaanxi Goat Milk Product Quality Supervision and Inspection Center),Fuping 711700,China;Xi’an Junyuan Animal Husbandry Co.Ltd.,Xi’an 710400,China;Shandong Institute of Food and Drug Inspection,Jinan 250101,China;College of Animal Science and Technology,Northwest A&F University,Yangling 712100,China)

机构地区：[1]西北农林科技大学食品科学与工程学院,陕西杨凌712100 [2]富平县检验检测中心(陕西省羊乳产品质量监督检验中心),陕西富平711700 [3]西安市军源牧业有限责任公司,陕西西安710400 [4]山东省食品药品检验研究院,山东济南250101 [5]西北农林科技大学动物科技学院,陕西杨凌712100

出　　处：《乳业科学与技术》2024年第6期8-14,共7页JOURNAL OF DAIRY SCIENCE AND TECHNOLOGY

基　　金：金昌奶绵羊试验示范基地项目(K4030220448)。

摘　　要：探究绵羊乳在不同泌乳阶段的酸度变化规律,揭示影响绵羊乳酸度的关键因素。对不同泌乳阶段绵羊乳pH值、可滴定酸度、脂肪、蛋白质、总糖、矿物质含量、密度、乳糖含量、蛋白质组成、脂肪酸种类及含量进行分析,并通过相关性分析明确不同泌乳阶段绵羊乳理化指标与酸度变化之间的关系。结果表明:生鲜绵羊乳酸度变化与泌乳阶段密切相关,泌乳前期酸度最高,随着泌乳期延长,酸度逐渐降低;且酸度变化主要与乳中蛋白质含量、脂肪含量、脂肪酸构成、总糖、乳糖、矿物质含量及密度等因素有关;其中蛋白质含量与酸度变化关联度最大,而脂肪酸含量与酸度变化的关联度较小。This study explored changes in the acidity of sheep milk across different lactation periods and the key factors affecting the acidity of sheep milk.The pH,titratable acidity,fat content,protein content and composition,total sugar content,mineral content,density,lactose content,fatty acid composition and content were analyzed,and the correlation between physicochemical indexes and acidity was investigated.The results indicated that the acidity of raw sheep milk was closely related to lactation stages.The highest acidity was observed in the early lactation period,which then gradually decreased as lactation progressed.Acidity changes were primarily associated with the protein content,fat content,fatty acid composition,total sugar content,lactose content,mineral content,and density of the milk.Among these,the protein content showed the strongest correlation with acidity changes,whereas fatty acid content had a relatively low correlation with acidity variations.

关 键 词：绵羊乳 泌乳期 酸度 理化指标 关联度 

分 类 号：TS252.2[轻工技术与工程—农产品加工及贮藏工程]