色瓦绵羊奶常规营养成分、矿物元素、维生素和脂肪酸含量分析

Analysis of Contents of Conventional Nutritional Components,Mineral Elements,Vitamins and Fatty Acids in Sewa Sheep Milk

为比较色瓦绵羊奶和东佛里生羊奶常规营养成分、矿物元素、维生素和脂肪酸含量的差异,选取色瓦绵羊和东佛里生羊各10只,其中色瓦绵羊在高原生态下放牧饲养,东佛里生羊在平原舍饲条件下饲养,二者胎次相同(第2胎)且均处于泌乳中期(第50天),于早、晚挤奶时收集奶样进行测定。结果显示:色瓦绵羊奶中脂肪、总固形物、钙、钾、铜、镁、硒、维生素A、维生素B_(1)、维生素B_(3)、维生素C、维生素E以及丁酸、己酸、辛酸、癸酸、月桂酸、十三烷酸、肉豆蔻酸、十五烷酸、棕榈酸、十七碳酸、十七碳一烯酸、硬脂酸、亚麻酸、花生酸、花生一烯酸、二十碳五烯酸、二十一碳酸、山嵛酸、油酸的含量显著或极显著高于东佛里生羊奶(P<0.05或P<0.01),而其蛋白质、乳糖、尿素氮、亚油酸含量以及冰点、酸度与东佛里生羊奶没有显著差异(P>0.05)。综上可知,色瓦绵羊奶中部分常规营养成分、矿物元素、维生素以及脂肪酸含量高于东佛里生羊奶,该结果可为色瓦绵羊奶的进一步利用提供依据。

To compare the differences in the contents of conventional nutritional components,mineral elements,vitamins and fatty acids between Sewa sheep milk and East Friensian sheep milk,ten Sewa sheep and ten East Friensian sheep were selected each.Sewa sheep were grazed and raised in a high-altitude ecosystem,while East Friensian sheep were raised in a plain barn.Two types of sheep had the same parity(second pregnancy)and were in the middle lactation stage(day 50).Milk samples were collected for measurement during morning and evening milking.The results showed that the contents of fat,total solids,calcium,potassium,copper,magnesium,selenium,vitamin A,vitamin B_(1),vitamin B_(3),vitamin C,vitamin E,as well as butyric acid,hexanoic acid,octanoic acid,sunflower acid,lauric acid,decanoic acid,myristic acid,pentadecanoic acid,palmitic acid,decadecanoic acid,decadecanoic acid,stearic acid,linolenic acid,arachidonic acid,arachidonic acid,eicosapentaenoic acid,heneicosanoic acid,behenic acid and oleic acid in Sewa sheep milk were significantly or extremely significantly higher than those in East Friensian sheep milk(P<0.05 or P<0.01),while there were no significant differences in the protein,lactose,urea nitrogen and linoleic acid contents,as well as freezing point and acidity between Sewa sheep milk and East Friensian sheep milk(P>0.05).In conclusion,the contents of some conventional nutrients,mineral elements,vitamins and fatty acids in Sewa sheep milk are higher than those in East Friensian sheep milk.The results of this experiment provide a basis for the further utilization of Sewa sheep milk.