摘要
对新疆地区不同季节牛乳粉脂肪酸含量和组成进行了分析。结果表明:在新疆农区奶牛舍饲的奶源条件下,冷季生产的全脂牛乳粉脂肪和总脂肪酸含量高于暖季,差异极显著(P<0.01);冷季牛乳粉饱和脂肪酸(SFA)含量超过暖季,有极显著差异(P<0.01),占比低于暖季,有显著差异(P<0.05);冷季牛乳粉单不饱和脂肪酸(MUFA)的含量和占比均高于暖季,含量差异极显著(P<0.01),占比差异显著(P<0.05);冷季牛乳粉多不饱和脂肪酸(PUFA)的含量和占比均高于暖季,且差异极显著(P<0.01)。按脂肪酸种类统计,两季约有55%的脂肪酸含量有显著或极显著差异,约有41%的脂肪酸占比有显著或极显著差异。冷季牛乳粉的MUFA、PUFA、必需脂肪酸(EFA)含量和占比均高于暖季;冷季牛乳粉的不饱和脂肪酸/饱和脂肪酸(USFA/SFA)比率为44.79%,暖季为38.55%。冷季牛乳粉的脂肪酸组成更符合人体健康需要,因此其营养价值更高。
In this study,the content and composition of fatty acids in milk powder in different seasons of Xinjiang were analyzed.The results showed that,the content of fat and total fatty acids of whole milk powder produced in cold season was higher than that in warm season under the current conditions of milk source,the difference was extremely significant(P<0.01);the content of saturated fatty acid(SFA)was higher in cold season than that in warm season,also with the extremely significant difference(P<0.01),on the contrary,its proportion was significantly higher in warm season(P<0.05);the content and proportion of monounsaturated fatty acid(MUFA)in cold season were all higher than those in warm season,the difference of contents was extremely significant(P<0.01),while that of proportions was significant(P<0.05);the content of proportion of polyunsaturated fatty acids(PUFA)in cold season were also higher than those in warm season,and the differences were all extremely significant(P<0.01).According to the type of fatty acids,there were significant or extremely significant differences in the contents of about 55%fatty acids in two seasons,and a significant or extremely significant difference in the proportions of about 41%fatty acids was also found.The content and proportion of MUFA,PUFA and essential fatty acid(EFA)in cold season were all higher than that in warm season.The percentage ratio of USFA to SFA in cold season was 44.79%,and that in warm season was38.55%.The fatty acid composition of milk powder in cold season is more in line with the needs of human health,hence its nutritional value in cold season is higher.
作者
刘莉
詹振宏
翟卫爽
陆东林
LIU Li;ZHAN Zhen-hong;ZHAI Wei-shuang;LU Dong-lin(Dairy Products Quality Monitoring Center of Xinjiang Uygur Autonomous Region,Urumqi 830000,China;Dairy Association of Urumqi,Urumqi 830000,China;Xinjiang Tianshan Animal Husbandry Bio-engineering Co.,LTD,Changji 831100,China)
出处
《草食家畜》
2019年第6期33-39,共7页
Grass-Feeding Livestock
基金
乌鲁木齐市奶业协会项目“优质乳工程的实验和推广”(WNKC 2017001)
关键词
牛乳粉
生产季节
脂肪酸组成
营养价值
milk powder
production season
fatty acid composition
nutritional value
