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首页> 外文会议>International Symposium on the Nutrition of Herbivores(ISNH-7); 20070917-22; Beijing(CN) >Response of milk fatty acid profile to various protein levels in goat diets with similar fatty acid content
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Response of milk fatty acid profile to various protein levels in goat diets with similar fatty acid content

机译：相似脂肪酸含量的山羊日粮中牛奶脂肪酸谱对各种蛋白质水平的响应

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摘要

The aim of the study was to evaluate the influence of feeding different protein levels (11.4,13.3 and 16.9%) in diets for goats on the fatty acid (FA) profile in milk. The experimental design was 3×3 Latin square. Each 22-day experimental period consisted of 14 days adaptation to the diets and 8 days for milk sample collection. Separation of methylated FAs was achieved using GLC. Milk production was nearly the same when the low- and medium-protein diets were fed, while the high-protein diet resulted in a tendency to increase milk production. The concentrations of total saturated fatty acids (SFA) were similar in milk from goats fed the diets containing low- and medium-protein contents, while the diet containing the highest content of protein resulted in a slight increase in the concentration and daily production of SFA milk. The concentration and daily production of monounsaturated fatty acids, CLA isomers, other polyunsaturated fatty acids and the sum of FAs in milk increased as the dietary protein level rose. The highest dietary protein content resulted in an increase in the A9-desaturase index.
机译：该研究的目的是评估山羊日粮中饲喂不同蛋白质水平（11.4、13.3和16.9％）对牛奶中脂肪酸（FA）的影响。实验设计为3×3拉丁方形。每个22天的实验期包括适应饮食的14天和收集牛奶样品的8天。使用GLC实现了甲基化FA的分离。饲喂低蛋白和中蛋白日粮时，牛奶的产量几乎相同，而高蛋白日粮则导致牛奶产量增加的趋势。饲喂低蛋白和中蛋白含量日粮的山羊奶中的总饱和脂肪酸（SFA）浓度相似，而蛋白含量最高的日粮中SFA的浓度和日产量略有增加牛奶。随着饮食蛋白质水平的升高，牛奶中单不饱和脂肪酸，CLA异构体，其他多不饱和脂肪酸的含量和日产量以及FA的总量增加。最高的饮食蛋白质含量导致A9-去饱和酶指数增加。

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