Seasonal variation in fatty acid composition of cow milk in relation to the feeding system

The fatty acid (FA) composition of bulk milk fat was examined on three dairy farms applying the seasonal pasture and on two farms applying the permanently indoor silage feeding. The seasonal variation in the content of major FAs was investigated in relation to the effect of farm in each feeding system separately. Six samples in winter period and four samples in summer period were taken on each farm. In the grazing herds, the seasonal changes were found in FAs forming 90 g/100 g total FAs on average (P 0.05). Only several FAs, forming 14 g/100 g total FAs on average, were influenced by the season effect in the indoor herds (P 0.05). The milk produced by grazing cows may be positively evaluated by consumers.

[1]  J. Horbańczuk,et al.  The effect of feeding linseed cake on milk yield and milk fatty acid profile in goats , 2010 .

[2]  P. Póti,et al.  The effect of grazing on the composition of conjugated linoleic acid isomers and other fatty acids of milk and cheese in goats. , 2009 .

[3]  P. Parodi.  Has the association between saturated fatty acids, serum cholesterol and coronary heart disease been over emphasized? , 2009 .

[4]  J. Szarek,et al.  Seasonality in milk performance and reproduction of dairy cows in low-input farms depending on feeding system * , 2009 .

[5]  R. Krauss,et al.  A reappraisal of the impact of dairy foods and milk fat on cardiovascular disease risk , 2009, European journal of nutrition.

[6]  J. Horbańczuk,et al.  Chemical composition, physical traits and fatty acid profile of goat milk as related to the stage of lactation , 2009 .

[7]  A. Simopoulos,et al.  The Importance of the Omega-6/Omega-3 Fatty Acid Ratio in Cardiovascular Disease and Other Chronic Diseases , 2008, Experimental biology and medicine.

[8]  A. Høstmark,et al.  Bovine milk in human nutrition – a review , 2007 .

[9]  Z. Cao,et al.  Effect of processing whole cottonseed on yield and composition of milk in dairy cows , 2007 .

[10]  M. Doreau,et al.  Diet, rumen biohydrogenation and nutritional quality of cow and goat milk fat , 2007 .

[11]  A. Węglarz,et al.  Suitability of Polish Red cattle for the production of milk of high biological quality in the ecological management system , 2007 .

[12]  L. D. Muller,et al.  Supplementing total mixed rations with pasture increase the content of conjugated linoleic acid in milk , 2006 .

[13]  R. Dewhurst,et al.  Increasing the concentrations of beneficial polyunsaturated fatty acids in milk produced by dairy cows in high-forage systems , 2006 .

[14]  A. Elgersma,et al.  Modifying milk composition through forage , 2006 .

[15]  R. Sieber,et al.  Conjugated linoleic acids in milk fat : Variation and physiological effects , 2006 .

[16]  C. Lopez,et al.  The linear relationship between the proportion of fresh grass in the cow diet, milk fatty acid composition, and butter properties. , 2006, Journal of dairy science.

[17]  D. Bauman,et al.  Major advances associated with the biosynthesis of milk. , 2006, Journal of dairy science.

[18]  R. Dekker,et al.  Influence of pasture feeding and stall feeding on CLA and other fatty acids in bovine milkfat , 2006 .

[19]  S. Nam,et al.  Factors Affecting Conjugated Linoleic Acid Content in Milk and Meat , 2005, Critical reviews in food science and nutrition.

[20]  D. Bauman,et al.  Modifying milk fat composition of dairy cows to enhance fatty acids beneficial to human health , 2004, Lipids.

[21]  R. Bessa,et al.  Effect of diet on the fatty acid pattern of milk from dairy cows , 2004 .

[22]  D E Bauman,et al.  The effect of breed, parity, and stage of lactation on conjugated linoleic acid (CLA) in milk fat from dairy cows. , 2003, Journal of dairy science.

[23]  R. Mensink,et al.  Effects of dietary fatty acids and carbohydrates on the ratio of serum total to HDL cholesterol and on serum lipids and apolipoproteins: a meta-analysis of 60 controlled trials. , 2003, The American journal of clinical nutrition.

[24]  G. Basta,et al.  n-3 Fatty acids and the inflammatory response — biological background , 2001 .

[25]  S. Kristensen,et al.  n−3 polyunsaturated fatty acids and coronary thrombosis , 2001, Lipids.

[26]  M. McGuire,et al.  Conjugated linoleic acid (CLA): A ruminant fatty acid with beneficial effects on human health , 2000 .