| Record number | 421224 |
|---|---|
| Title | The effect of allocation frequency in rotational grazing systems on the fatty acid profile in milk fat of dairy cows |
| Author(s) | Vlaeminck, B.; Abrahamse, P.A.; Fievez, V.; Lourenco, M.; Dijkstra, J.; Tamminga, S. |
| Source | In: 23th General Meeting of the European Grassland Federation, Kiel, Germany, 29 August - 02 September, 2010. - Duderstadt : Mecke Druck und Verlag - p. 102 - 102. |
| Event | Duderstadt : Mecke Druck und Verlag 23th General Meeting of the European Grassland Federation, 2010-08-29/2010-09-02 |
| Department(s) |
Animal Nutrition WIAS |
| Publication type | Abstract in scientific journal or proceedings |
| Publication year | 2010 |
| Abstract | Four Holstein cows were used to evaluate the effect of allocating cows every 4 day (d) to a new 0.5-ha plot of Lolium perenne L. on the profile of fatty acids (FA) in milk. The experiment was run during 2 rotations with 2 measuring periods of 4 d each. During the 4 d period, the proportion (g per 100 g FA) of 18:3n-3 and total FA content (mg per g DM) of grass decreased linearly. Similarly, milk FA composition was largely affected by day within the 4 d period. Proportions of t11-18:1 in milk fat increased on d 2 (4.52 g per 100 g FA) and decreased thereafter (3.77 g per 100 g FA on d 4). Proportions of c9t11-18:2 (2.36 and 1.83 g per 100 g FA), t11c15-18:2 (0.81 and 0.63 g per 100 g FA) and 18:3n-3 (0.92 and 0.88 g per 100 g FA) in milk followed the same pattern. Results from this study suggest short term variation in pasture quality during the 4 d affected milk FA composition, with a greater effect on biohydrogenation intermediates in milk fat compared with its major precursor, 18:3n-3. |
| Comments |
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