Banks W, Clapperton J L, Ferrie M E
J Dairy Res. 1976 Jun;43(2):219-27. doi: 10.1017/s0022029900015776.
The effects on the fatty acid composition of milk fat of feeding various oil-enriched diets (soya oil, red palm oil/palmitic acid and tallow) to dairy cows receiving a fat-deficient basal diet are reported. It was found that a linear relation was obtained between the dietary intake of C18 fatty acids and their output in milk fat. A similar relation, applicable only to the oil-rich diets, was found for the C16 acids. The significance of these relations is discussed. Fatty acid compositions and yields are discussed and compared with literature examples in which similar oil-rich diets were fed, but in which the low amount of fat in the basal diet did not markedly depress milk yield. The proportion of trans-isomer in the octadecnoic acid was found to increase appreciably on feeding soya oil, and to a lesser extent with dietary tallow. A linear relation between the 18:0 and 18:1 contents of milk fat was found, and its significance is discussed.
本文报道了给缺脂基础日粮的奶牛饲喂各种富含油脂的日粮（大豆油、红棕榈油/棕榈酸和牛油）对乳脂脂肪酸组成的影响。研究发现，日粮中C18脂肪酸的摄入量与其在乳脂中的产出量之间呈线性关系。对于C16酸，发现了一种仅适用于富含油脂日粮的类似关系。讨论了这些关系的意义。文中讨论了脂肪酸组成和产量，并与文献中饲喂类似富含油脂日粮的例子进行了比较，但那些例子中基础日粮中的低脂肪含量并未显著降低产奶量。研究发现，饲喂大豆油时，十八碳烯酸的反式异构体比例显著增加，饲喂牛油时增加幅度较小。发现乳脂中18:0和18:1含量之间呈线性关系，并讨论了其意义。
