The objective of this study was to compare the fatty acid (FA) profile of cheese and milk produced from cows grazing on timothy and reed canarygrass pasture or fed indoor. Twenty multiparous dairy cows were selected from a single farm in Pyeongchang (South Korea) and assigned to two experimental groups (TMR and PAST). TMR was kept indoor and fed with a total mixed ration, while PAST was maintained on timothy and reed canarygrass (70%–30%) pasture for 5 months (beginning of June–end of October). At approximately 6‐day interval during this period, Montasio‐type cheeses were produced for each experimental group, and at the same day, bulk milk for each group was collected. Chemical composition and FA profile of cheeses and milk and the texture of cheeses were carried out. The diet affected milk fat content, which was higher in PAST than in TMR (p < 0.05). The pasture feeding increased C18:0 (p < 0.01), C18:1n‐9cis (p < 0.01), C18:3n‐3 (p < 0.05), monounsaturated FA (p < 0.05) and n‐3 polyunsaturated FA (PUFA, p < 0.05), and reduced C12:0 (p < 0.01), C16:0 (p < 0.01), C18:2n‐6cis (p < 0.05), C20:3n‐6 (p < 0.05), saturated FA (p < 0.05) and n‐6:n‐3 PUFA ratio (p < 0.01) of both milk and cheese compared with those of TMR. From FA composition point of view, pasture‐based feeding system increased the healthiness of dairy products.

中文翻译：

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来自在提摩太和芦苇金丝雀草牧场上放牧或在室内喂养的奶牛的牛奶和蒙塔西奥型奶酪脂肪酸成分

这项研究的目的是比较在提摩太和芦苇金丝雀草牧场上放牧或在室内喂养的奶牛生产的奶酪和牛奶的脂肪酸（FA）特性。从平昌（韩国）的一个农场中选出了20头多头奶牛，并分配给两个实验组（TMR和PAST）。TMR保持在室内并以全日粮混合喂养，而PAST则在苔藓和芦苇金丝雀（70％–30％）的草地上保持5个月（6月至10月底开始）。在此期间大约每隔6天，为每个实验组生产Montasio型奶酪，并在同一天收集每组的散装牛奶。进行奶酪和牛奶的化学成分和FA分布以及奶酪的质地。饮食影响牛奶脂肪含量，PAST中的脂肪含量高于TMR（p  ＜0.05）。牧场饲喂增加了C18：0（p  <0.01），C18：1n-9cis（p  <0.01），C18：3n-3（p  <0.05），单 不饱和脂肪酸（p <0.05）和n-3多不饱和脂肪酸（PUFA） ，p  <0.05）和还原的C12：0（p  <0.01），C16：0（p  <0.01），C18：2n-6cis（p  <0.05），C20：3n-6（p  <0.05），饱和FA 与TMR相比，牛奶和奶酪的（p  <0.05）和n-6：n-3 PUFA比率（p <0.01）。从脂肪酸的组成来看，基于牧场的饲喂系统提高了乳制品的健康性。