中国荷斯坦牛原料乳脂肪酸组成及变化规律的研究  

Study on the Composition and Variation of Fatty Acid of the Raw Milkin Chinese Holstein

作　　者：郁校静[1] 常玲玲[1] 张亚琴[1] 朱平华[1] 李云龙[1] 杨章平[1] 毛永江[1] 

机构地区：[1]扬州大学动物科学与技术学院,江苏扬州225009

出　　处：《中国牛业科学》2011年第5期4-8,共5页China Cattle Science

基　　金：江苏省大学生实践创新训练计划;扬州大学大学生科技创新基金;江苏省高校自然科学基金重大项目(09KJA230002)

摘　　要：[目的]为了分析测定季节、泌乳阶段、胎次及乳房炎对脂肪酸的影响。[方法]147头中国荷斯坦牛作为研究对象,采用气相色谱对原料乳脂肪酸进行测定,采用一般线性模型统计分析。[结果]冬季原料乳脂肪酸处于最优质水平;随着泌乳时间的延续,脂肪酸含量逐渐减少,但比例逐渐优化;随着胎次的提高,脂肪酸含量逐渐减少,但比例逐渐优化;乳房炎降低了脂肪酸的总量,但对脂肪酸的比例影响不大。[结论]在生产实践中,应灵活调控各影响因素对原料乳脂肪酸的影响,从而提高牛奶品质。【Objective】Using Gas Chromatography to determine milk fatty acids and analyze the effect of season,milking period,parity and mastitis on milk fatty acids.【Method】147 Chinese Holsteins were used in the experimental farm of Yangzhou University as research objects and the process was analyzed by general linear model.【Results】The results showed that the fatty acids of raw milk in winter had the highest quality.With the increasing of lactation and parities,the fatty acid content decreased,but the proportion was gradually optimized.Mastitis reduced the fatty acid content,but it had little effect on the proportion of fatty acids.【Conclusion】In the production practice,each factors affecting fatty acid composition of raw milk should be flexibly regulated,so as to improve the milk quality.

关 键 词：中国荷斯坦牛 乳脂肪酸 季节 泌乳阶段 胎次 乳房炎 

分 类 号：S823.4[农业科学—畜牧学]