Addis, Margherita and Cabiddu, Andrea and Decandia, Mauro and Fiori, Myriam and Spada, Simona and Bulleddu, C. and Cammelli, Rossana and Caria, A. and Lai, Vittorio and Lutzoni, G. and Natale, A. and Oppia, P. and Pintus, C. and Spiga, Alessandra and Piredda, Giovanni and Porqueddu, Claudio and Molle, Giovanni (2007) A Survey on the milk fatty acid composition of forty dairy sheep flocks in Sardinia. Italian Journal of Animal Science, Vol. 6 (Suppl. 1), p. 532-534. eISSN 1828-051X. Article.
A survey was carried out to monitor milk fatty acid (FA) composition during two years (2003 and 2004) on forty dairy sheep flocks, fed pasture based rations, in 5 macro pedoclimatic areas of Sardinia, featured by different i) soil type, (granitic, G; basaltic, B and alluvial, A) ii) average annual rainfall (low, L, 500-600 mm/year; high, H, 600-800 mm/year). Milk FA profile was strongly influenced by year. In particular milk linolenic acid (LN), CLA (conjugated linoeic acid) and PUFA (polyunsaturated fatty acids) levels increased (by 25, 30 and 14%, respectively, P<0.01) whereas the atherogenicity index (AI) decreased (by 8%, P<0.01) in all areas in 2004 as compared with 2003. Pedoclimatic area affected milk fatty acid composition (P<0.01). In both years milk from AL farms showed the highest levels of LN, CLA and PUFA. AI was lower in BH and GH in year 2003 and in BH, AH and GL in 2004.
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