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Velik M.,Lehr und Forschungszentrum Raumberg Gumpensteln | Breitfuss S.,Lehr und Forschungszentrum Raumberg Gumpensteln | Urdl M.,Lehr und Forschungszentrum Raumberg Gumpensteln | Kaufmann J.,Lehr und Forschungszentrum Raumberg Gumpensteln | Steinwidder A.,Lehr und Forschungszentrum Raumberg Gumpensteln
Zuchtungskunde | Year: 2014

Several studies have revealed that ruminant nutrition has a major impact on the fatty add profile of milk. Aim of the present study was to examine and compare the fatty add profile of dairy cow milk of (1) Alpine pasture systems, (2) continuous grazing on short grass, (3) grass silage-hay-concentrate ration, (4) maize silage-hay-concentrate ration and (5) Austrian fresh milk of different milk companies/labels provided by supermarkets. The impact of feeding system on milk content (g/100 g milk fat) of saturated (SEA) and mono-unsaturated fatty adds (MUFA) was only moderate (60-68 g SFA, 17-24 g MUFA). The influence on omega-6 (n-6) FA was not dear (1.6-1.8 g). However, omega-3 (n-3) FA and conjugated linoleic acid (CLA) were markedly influenced by feeding system. Milk from continuous grazing contained the highest values of n-3 FA (1.4 g) and CLA (1.3 g), followed by the Alpine pasture milk. Milk from Austrian retail markets and milk from the hay-concentrate ration had average n-3 FA and CLA contents of 0.9 and 0.7 g, respectively. Milk from maize silage-hay-concentrate ration contained the lowest n-3 and CLA contents (0.4 g/100 g milk fat each). CLA and n-3 FA contents of milk were markedly influenced by season. © Verlag Eugen Ulmer, Stuttgart. Source

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