Lipid complex effect on fatty acid profile and chemical composition of cow milk and cheese.
The effect of administration of lipid complex (LC) on cow milk and cheese characteristics was studied. Lipid complex was elaborated based on grapeseed oil with synthesized conjugated linoleic acid (CLA) and Atlantic mackerel oil enriched in n-3 fatty acids. The 4-wk experiment was conducted on 30 Polish Holstein Friesian cows. The experimental group cow diet was supplemented with 400 g/d of LC (containing 38% CLA, and eicosapentaenoic acid + docosahexaenoic acid in a relative amount of 36.5%) on a humic-mineral carrier. The chemical composition and fatty acid profile of milk and rennet cheese from raw fresh milk were analyzed. Lipid complex supplementation of the total mixed ration had no effect on milk yield and milk composition, except fat content, which decreased from 4.6 to 4.1%, a 10.9% decrease. Milk from cows treated with LC had greater relative amounts of unsaturated fatty acids, particularly polyunsaturated fatty acids, and lesser relative amounts of saturated fatty acids. Lipid complex addition changed milk fat fatty acid profile: C18:2 cis-9,trans-11 and trans-10,cis-12 isomer (CLA) contents increased by 278 and 233%, respectively, as did eicosapentaenoic acid (C20:5) and docosahexaenoic acid (C22:6) contents. Milk fat fatty acid profile changes were correlated with the modifications in rennet cheese fatty acid profile. Lipid complex supplementation of dairy cows produced considerable changes in the biological value of milk and cheese fat.
Institute of Animal Breeding, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 38c, 51-630 Wroclaw, Poland. Electronic address: robert.bodkowski@up.wroc.pl.
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Bodkowski
Institute of Animal Breeding, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 38c, 51-630 Wroclaw, Poland.
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Czyż
Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 38c, 51-630 Wroclaw, Poland.
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Kupczyński
Institute of Animal Breeding, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 38c, 51-630 Wroclaw, Poland.
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Patkowska-Sokoła
Institute of Animal Breeding, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 38c, 51-630 Wroclaw, Poland.
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Nowakowski
Department of Animal Nutrition and Feed Management, Faculty of Biology and Animal Science, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 38c, 51-630 Wroclaw, Poland.
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Wiliczkiewicz
D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle / Q000378:metabolism; D002611:Cheese / Q000032:analysis*; D005395:Fish Oils / Q000494:pharmacology*; D044243:Linoleic Acids, Conjugated / Q000494:pharmacology*; D008055:Lipids / Q000032:analysis*; D008892:Milk / Q000737:chemistry*; D010473:Perciformes; D010938:Plant Oils / Q000494:pharmacology*; D027843:Vitis / Q000737:chemistry
D005395:Fish Oils; D044243:Linoleic Acids, Conjugated; D008055:Lipids; D010938:Plant Oils
dairy cow; fatty acid; lipid complex; milk and cheese