Variation in fatty acid composition of ewes' milk during continuous transition from dry winter to natural pasture diet

被引：29

作者：

Ostrovsky, Ivan ^{[1
]}

Pavlikova, Eva ^{[1
]}

Blasko, Jaroslav ^{[1
]}

Gorova, Renata ^{[1
]}

Kubinec, Robert ^{[1
]}

Margetin, Milan ^{[2
]}

Sojak, Ladislav ^{[1
]}

机构：

[1] Comenius Univ, Fac Nat Sci, Inst Chem, SK-84215 Bratislava, Slovakia

[2] Res Inst Anim Prod Trencianska Tepla, SK-94992 Nitra, Slovakia

来源：

INTERNATIONAL DAIRY JOURNAL | 2009年 / 19卷 / 09期

关键词：

CONJUGATED LINOLEIC-ACID; VACCENIC ACID; SUNFLOWER OIL; COWS MILK; ISOMERS; N-3; PRODUCTS; LEVEL;

D O I：

10.1016/j.idairyj.2009.03.006

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

The profile variations of approximately 70 fatty acids (FAs) in milk of ewes consuming total mixed rations (TMR) and grazing natural pasture were determined. Milk of ewes grazing pasture in May and September in the Slovak Republic contained 3-times more conjugated linoleic acid (CIA) (P < 0.001) and trans-vaccenic acid (TVA) (P < 0.001), and 2-times more alpha-linolenic acid (ALA) (P < 0.001) than that of ewes fed TMR. A doubling of the CIA and TVA contents of milk of ewes fed with TMR was achieved by changing to meadow hay containing a higher ALA content. Less availability of vegetation and lower ALA pasture content in summer (P < 0.001) caused a 2-fold decrease (P < 0.001) of CLA and TVA contents when compared with data obtained in May. With grass re-growth and an increase in pasture ALA content in September, the CLA and TVA contents rose to values similar to those obtained in May (P > 0.05). No significant differences in the FA composition in milk of ewes grazing on summer pasture at higher altitude were observed. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：545 / 549

页数：5

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