Wplyw wybranych czynnikow na zawartosc skoniugowanego kwasu linolowego w mleku krow

• Autorzy: Nalecz-Tarwacka T , Kuczynska B. , Grodzki H. , Slosarz J.

Warianty tytułu

EN

Effect of selected factors on conjugated linoleic acid content in milk of dairy cows

• Języki publikacji: PL

Abstrakty

EN

The aim of the study was to examine CLA (cis 9 trans 11) content in milk depending on rations used, number of lactation, its phase and the productivity of cows as well as fat content in milk. The studies were carried out on 429 cows fed pasture during summer and 41 cows fed TMR. It was found that the CLA content in milk is determined by feeding as well as by other, unconnected factors. From the consumer’s point of view, the most beneficial influence had a ration in which the only juicy roughage was green pasture forage while the concentrate constituted an addition of about 10% of dry matter. Among winter rations based on conserved fodders, the one with a predominance of wilted grass silage was observed to have a more beneficial influence. However, feeding with the TMR system resulted in the smallest CLA content. It was found that the CLA content was the highest in milk from older cows in their 4th lactation and in the period beyond the 120th day of lactation. Moreover, the highest content of CLA was observed in cows with a moderate level of milk production (below 6.000 kg). These findings justify creating ecological farms keeping cows. The analysis of minimal and maximal values of CLA content in the milk of investigated cows reveals big individual differences, so that further research should be carried out in order to explain the existing divergences. Milk collected from family farms dominating in Poland - where summer feeding is based on green forages and pasture thanks to its healthful properties (measured by the CLA content) may constitute a serious competition to milk produced in other EU countries, where the TMR feeding system prevails and farmers increasingly abandon grazing their cows on pasture.

Słowa kluczowe

PL

krowy mleczne; mleko; kwasy tluszczowe wielonienasycone; sprzezony kwas linolowy; zawartosc sprzezonego kwasu linolowego; uwarunkowania; zywienie zwierzat; zywienie alkierzowe; zywienie pastwiskowe; system TMR; laktacje kolejne; faza laktacji; wydajnosc mleka; zawartosc tluszczu

• Wydawca: -
• Czasopismo: Medycyna Weterynaryjna
• Rocznik: 2009
• Tom: 65
• Numer: 05
• Opis fizyczny: s.326-329,tab.,bibliogr.

Twórcy

autor

Nalecz-Tarwacka T

• Szkola Glowna Gospodarstwa Wiejskiego, ul.Ciszewskiego 8, 02-786 Warszawa

autor

Kuczynska B.

autor

Grodzki H.

autor

Slosarz J.

Bibliografia

• 1. Åkerlind M., Holtenius K., Bertilsson J., Emanuelson M.: Milk composition and feed intake in dairy cows selected for high or low fat percentage. Livestock Prod. Sci. 1999, 59, 1-11.
• 2. Anon.: Official Methods of Analysis of the Associated Official Analytical Chemists. Chapter 32, 1990, Washington, DC, AOAC.
• 3. Auldist M. J., Kay J. K., Thomson N. A., Napper A. R., Kolver E. S.: Concentration of conjugated linoleic acid in milk from cows grazing pasture or fed a total mixed ration for an entire lactation. Brief communication. Proc. New Zealand Soc. Anim. Prod. 2002, 62, 240-241.
• 4. Bell J. A., Griinari J. M., Kennelly J. J.: Effect of safflower oil, flaxseed oil, monensin, and vitamin E on concentration of conjugated linoleic acid in bovine milk fat. J. Dairy Sci. 2006, 89, 733-748.
• 5. Bessa R. J. B., Santos-Silva J., Ribeiro J. M. R., Portugal A. V.: Reticulo-rumen biohydrogenation and the enrichment of ruminant edible products with linoleic acid conjugated isomers. Livest. Prod. Sci. 2000, 63, 201-211.
• 6. Brzóska F.: Effect of copper inhibitors in diet on cow's yield, milk composition and cholesterol level in milk and blood plasma. Ann. Anim. Sci. 2004, 4, 43-55.
• 7. Bu D. P., Wang J. Q., Dhiman T. R., Liu S. J.: Effectiveness of oils rich in linoleic and linolenic acids to enhance conjugated linoleic acid in milk from dairy cows. J. Dairy Sci. 2007, 90, 998-1007.
• 8. Dhiman T. R., Anand G. R., Satter L. D., Pariza M. W.: Conjugated linoleic acid content of milk cows fed different diets. J. Dairy Sci. 1999, 82, 2146-2156.
• 9. Elgersma A., Ellen G., Tamminga S.: Rapid decline of contents of benefical omega-7 fatty acids in milk from grazing cows with decreasing herbage allowance. Grassland Sci. Europe 2004b, 9, 1136-1138.
• 10. Elgersma A., Ellen G., Van Der Horst H., Boer H., Dekker P. R., Tamminga S.: Quick changes in milk fat composition from cows after transition from fresh grass to a silage diet. Animal Feed Sci. Technol. 2004a, 117, 13-27.
• 11. Elgersma A., Tamminga S., Ellen G.: Comparison of the effects of grazing and zero-grazing of grass on milk fatty acid composition of dairy cows. Grassland Sci. Europe 2003, 8, 271-274.
• 12. Ellis K. A., Innocent G., Grove-White D., Cripps P., McLean W. G., Howards C. V., Mihn M.: Comparing the fatty acid composition of organic and conventional milk. J. Dairy Sci. 2006, 89, 1938-1950.
• 13. Griinari J. M., Corl B. A., Lacy S. H., Chouinard P. Y., Nurmela K. V. V., Bauman D. E.: Conjugated linoleic acid is synthesized endogenously in lactating dairy cows by Δ⁹-desaturase. J. Nutr. 2000, 130, 2285-2291.
• 14. Jahreis G., Fritsche J., Steinhart H.: Conjugated linoleic acid in milk fat: high variation depending on production system. Nutr. Res. 1997, 17, 1479-1484.
• 15. Kay J. K., Mackle T. R., Auldist M. J., Thomson N. A., Bauman D. E.: Endogenous synthesis of cis-9, trans-11 conjugated linoleic acid in dairy cows fed fresh pasture. J. Dairy Sci. 2004, 87, 369-378.
• 16. Kelly M. L., Kolver E. S., Bauman D. E., Amburgh M. E., Muller L. D.: Effect of intake of pasture on concentrations of conjugated linoleic acid in milk of lactating cows. J. Dairy Sci. 1998, 81, 1630-1636.
• 17. Kelsey J. A., Corl B. A., Collier R. J., Bauman D. E.: The effect of breed, parity, and stage of lactation on conjugated linoleic acid (CLA) in milk fat from dairy cows. J. Dairy Sci. 2003, 86, 2588-2597.
• 18. Khanal R. C., Olson K. C.: Factors affecting conjugated linoleic acid (CLA) content in milk, mit, and egg: a review. Pakistan J. Nutr. 2004, 3, 82-98.
• 19. Kuczyńska B.: Badanie czynników warunkujących zmiany jakości tłuszczu mleka krowiego i koziego. Praca dokt., SGGW, Warszawa 2001.
• 20. Lock A. L., Garnsworthy P. C.: Seasonal variation in milk conjugated linoleic acid and Ä9-desaturase activity in dairy cows. Livest. Prod. Sci. 2003, 79, 47-59.
• 21. Loor J. J., Soriano F. D., Lin X., Herbein J. H., Polan C. E.: Grazing allowance after the morning or afternoon milking for lactating cows fed a total mixed ration (TMR) enhances trans 11-18:1 and cis 9, trans 11-18:2 (rumenic acid) in milk fat to different extents. Anim. Feed Sci. Technol. 2003, 103, 105-119.
• 22. Mcguire M. A., Mcguire M. K.: Conjugated linoleic acid (CLA): A ruminant fatty acid with beneficial effects on human health. J. Anim. Sci. 2000, 77, 1-8.
• 23. Nałęcz-Tarwacka T., Grodzki H.: Influence of early spring feeding on fatty acid levels of cow's milk. Pol. J. Food Nutr. Sci. 2005, 55, 67-70.
• 24. Offer N. W., Marsden M., Dixon J., Speake B. K., Thacker F. E.: Effect of dietary fat supplements on levels of n-3 poly-unsaturated fatty acids, trans acid in bovine milk. Animal Sci. 1999, 69, 613-625.
• 25. Peterson D. G., Kelsey J. A., Bauman D. E.: Analysis of variation in cis-9, trans-11 conjugated linoleic acid (CLA) in milk fat of dairy cows. J. Dairy Sci. 2002, 85, 2164-2172.
• 26. Reklewska B., Bernatowicz E., Reklewski Z., Nałęcz-Tarwacka T., Kuczyńska B., Zdziarski K., Oprządek A.: Zawartość biologicznie aktywnych składników w mleku krów zależnie od systemu żywienia i sezonu. Zesz. Nauk. Przegl. Hod. 2003, 68, 85-98.
• 27. Schroeder G. F., Delahoy J. E., Vidaurreta I., Bargo F., Galiostro G. A., Muller L. D.: Milk fatty acid composition of cows fed a total mixed ration or pasture plus concentrates replacing corn with fat. J. Dairy Sci. 2003, 86, 3237-3248.
• 28. Stanton C., Lawless F., Kjellmer G., Harrington D., Devery R., Connolly J. F., Murphy J.: Dietary influences on bovine milk cis-9, trans-11 conjugated linoleic acid content. J. Food Sci. 1997, 62, 1083-1086.
• 29. Thomson N. A., Van Der Poel W.: Seasonal variation of the fatty acid composition of milkfat from Fresian cows grazing pasture. Proc. New Zealand Soc. Anim. Prod. 2000, 60, 314-317.
• 30. Townsend S. J., Siebert B. D., Pitchford W. S.: Variation in milk fat content and fatty acid composition of jersey and friesian cattle. Proc. Assoc. Adv. Anim. Breeding Genetics 1997, 12, 283-291.
• 31. White S. L.,Bertrand J. A., Wade M. R., Washburn S. P., Green J. T., Jenkins T. C.: Comparison of fatty acid content of milk from Jersey and Holstein cows consuming pasture or a total mixed ration. J. Dairy Sci. 2001, 84, 2295-2301.
• 32. Whitlock L. A., Schingoethe D. J., AbuGhazaleh A. A., Hippen A. R., Kalscheur K. F.: Milk production and composition from cows fed small amounts of fish oil with extruded soybeans. J. Dairy Sci. 2006, 89, 3972-3980.
• 33. Williams C. M.: Dietary fatty acids and human health. Ann. Zootech. 2000, 49, 165-180.