Contradictory results have been found in the response of dairy goats to the supplementation of fish oil in their diet to improve the n‐3 polyunsaturated fatty acids (PUFA) in milk. The responses to the inclusion of fish oil in the diet of ruminants either induced milk fat depression, increased milk fat content, and/or negatively impacted milk yield. The objective of this study was to determine whether including a low dose of encapsulated fish oil in the diet of goats can modify yield, milk composition, and the fatty acid (FA) profile of milk. Ten Alpine goats were divided into two homogeneous subgroups and assigned to either the control or experimental diet. The control animals received the basal diet without supplementation of fish oil, whereas the experimental group was given the same basal diet supplemented with encapsulated fish oil (1.14 g /kg of concentrate) for 56 days. Milk samples were analyzed for chemical composition and FA profile. The inclusion of encapsulated fish oil in the goat diet did not affect the yield and composition of goat milk. The effect of diet was not significant on the FA profile of goat milk, except that 20:0 was lower (P < 0.05) in the milk of goats that received fish oil. The low dose of encapsulated fish oil supplement used in this study did not impact (P > 0.05) the PUFA content of goat milk or milk composition and yield; however, the atherogenicity index (AI), which is beneficial to heart health, was lower (P < 0.05) in the milk of goats that received fish oil as a supplement in their diet compared to the control.

中文翻译：

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向奶山羊饲喂少量胶囊化鱼油对牛奶产量，组成和脂肪酸谱的影响

矛盾的结果已经在奶山羊，以鱼油补充剂的响应被发现在他们的饮食，以提高ñ牛奶中的‐3多不饱和脂肪酸（PUFA）。反刍动物饮食中对鱼油含量的响应会导致牛奶脂肪减少，牛奶脂肪含量增加和/或牛奶产量受到负面影响。这项研究的目的是确定在山羊饲料中添加低剂量的胶囊化鱼油是否可以改变牛奶的产量，牛奶成分和脂肪酸（FA）谱。将十只高山山羊分成两个均一的亚组，并分配为对照或实验饮食。对照动物接受基础饮食，不补充鱼油，而实验组也给予相同基础饮食，补充胶囊化鱼油（1.14 g / kg浓缩物），持续56天。分析了牛奶样品的化学成分和FA曲线。山羊日粮中包含胶囊化鱼油不会影响山羊奶的产量和组成。饮食对山羊奶FA的影响不显着，除了20：0较低（P <0.05）在接受鱼油的山羊奶中。本研究中使用的低剂量胶囊化鱼油补充剂不会影响（P > 0.05）山羊奶的PUFA含量或牛奶成分和产量；然而，在饮食中接受鱼油作为补充的山羊奶中，对心脏健康有益的动脉粥样化指数（AI）较低（P <0.05）。