Fatty acid composition of cow milk fat produced on low-input mountain farms

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The fatty acid (FA) composition of bulk milk fat was examined on three mountain dairy farms in the Czech Republic. Milk samples were collected in the period of indoor grass silage feeding (November–April) and in the grazing period (May–October). In total fifty FAs were identified in the milk fat. The two-way ANOVA with factors of the farm and of the period of milk sample collection was used for the evaluation of variation in FA concentrations. Significant differences between the farms were found in the concentration of five FAs, which accounted for 30.40 g/100 g total FAs. Significant differences between the indoor and the grazing period were found in the concentration of sixteen FAs, which accounted for 63.86 g/100 g total FAs. The content of long-chain (> C16), mono- and polyunsaturated FAs in the milk fat was higher in the grazing period (49.22, 31.69 and 4.69 g/100 g total FAs) than in the indoor period (42.25, 27.55 and 4.15 g/100 g total FAs, respectively). The proportion of conjugated linoleic acid (CLA) was also higher in the grazing period (1.09 g/100 g total FAs) than in the indoor period (0.74 g/100 g total FAs). The medium-chain (C12–C16) and the saturated FAs were more abundant in the milk fat in the indoor period (48.91 and 67.16 g/100 g total FAs) than in the grazing period (41.31 and 62.16 g/100 g total FAs; respectively). These results indicated a positive influence of seasonal grazing on the FA profile of cow milk fat as regards its potential health effects in consumers. … full description

Bibliographic Details

Other Authors

Jan Frelich, 1941- , Martin Šlachta, 1975- , Oto Hanuš, 1957- , Jiří Špička , Eva Samková

Document Type

Articles

Physical Description

5 il.

Published in

Czech Journal of Animal Science. -- ISSN 1212-1819. -- Roč. 54, č. 12 (2009), s. 532-539

Subjects

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CATTLE

DAIRY COWS

ANIMAL HUSBANDRY METHODS

LOW INPUT AGRICULTURE

HIGHLANDS

ANIMAL NUTRITION

SEASONS

WINTER

SILAGE

GRASSES

SUMMER

GRAZING

MILK FAT

CHEMICAL COMPOSITION

FATTY ACIDS

UNSATURATED FATTY ACIDS

POLYUNSATURATED FATTY ACIDS

LINOLEIC ACID

SATURATED FATTY ACIDS

skot

mléčný skot

metody chovu zvířat

zemědělství s nízkými vstupy

vyšší polohy

výživa zvířat

roční období

zima

siláž

trávy

léto

pasení

mléčný tuk

chemické složení

mastné kyseliny

nenasycené mastné kyseliny

polynenasycené mastné kyseliny

kyselina linolová

nasycené mastné kyseliny

travní siláž

mastné kyseliny s dlouhým řetězcem

mononenasycené mastné kyseliny

konjugovaná kyselina linolová

mastné kyseliny se středně dlouhým řetězcem

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Item Description

5 tabulek

Bibliography

Literatura na s. 537-539