Study of fatty acid composition of natural swards in the region of Central Balkan mountains
2010
Todorova, P., Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria) | Mihaylova, G., Thratian University, Stara Zagora (Bulgaria). Agricultural Faculty | Metodieva, P., Institute of Cryobiology and Food Technology, Sofia (Bulgaria)
Fatty acid content in herbaceous vegetation of a mountain meadow of the Agrostis capillaris - Festuca fallax type located at the altitude of 1000 m and a high-mountain matgrass pasture of the Nardus stricta type at 1500 m above sea-level was studied. Percentage participation of grasses, legumes and miscellaneous herbs, as well as that of predominant herbaceous species in the plant biocenoses was recorded. It was found that the grasses prevailed in the both swards, participating on average with 87.86% in the meadow type and with 95.10% in the pasture one. The content of saturated fatty acids in the meadow type was 33.97% and in the pasture one 37.65%. The quantity of monounsaturated fatty acids in the meadow sward was 21.47% higher than that in the high-mountain pasture. Among essential fatty acids, the highest value was found for linolenic acid (source of CLA in milk), which was 17.86% higher in the biomass at 1500 m a.s.l. The values of the polyunsaturated fatty acids in the studied swards were similar, 43.15% and 43.83%, respectively and were greater, as compared to the other two groups. The high content of essential fatty acids in the natural swards is of greater importance for the metabolism in animal organism and for their entering, through the animal food, into the human organism.
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