Response of milk fatty acid profile to various protein levels in goat diets with similar fatty acid content
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.
fatty acids conjugated linoleic acid isomers protein level milk goats
M.Czauderna J.Kowalczyk T.Zebrowska J.P.Michalski I.W(a)sowska
The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences 05-110 Jablonna, Poland
国际会议
The 7tb International Symposium on the Nutrition of Herbivores(ISNH-7)(第七届国际草食动物营养研讨会)
北京
英文
1048-1053
2007-09-16（万方平台首次上网日期，不代表论文的发表时间）