A conjugated linoleic acid (CLA) supplement containing trans-10, cis-12 CLA reduces milk fat synthesis in lactating goats
| Autor: | D. Bauman, A. Goetsch, T. Gipson, A. Lock, M. Rovai |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Italian Journal of Animal Science, Vol 6, Iss 1s, Pp 629-631 (2010) |
| Druh dokumentu: | article |
| ISSN: | 1594-4077 1828-051X |
| DOI: | 10.4081/ijas.2007.1s.629 |
| Popis: | The efficacy of a lipid-encapsulated trans-10, cis-12 conjugated linoleic acid supplement (LE-CLA) on milk production and milk fatty acid (FA) profile was investigated. Thirty multiparous Alpine lactating goats (50 ± 7.4 kg) in late lactation were used in a 3 × 3 Latin square design. Does were fed a diet of bermudagrass hay, dehydrated alfalfa pellets, and concentrate. Does were randomly allocated to three treatments; A) unsupplemented (Control), B) supplemented with 30 g/d LE-CLA (low-dose; LLE), and C) supplemented with 60 g/d LE-CLA (high-dose; HLE). Milk yield, DMI, and milk protein content and yield were unaffected by treatment (P > 0.05). Compared with Control, milk fat yield was reduced 8.1% by the LLE treatment and 21.2% by the HLE treatment (P < 0.001), with milk fat content reduced 4.8 and 17.6% by the LLE and HLE treatments, respectively (P < 0.001). Milk fat content of trans-10, cis-12 CLA was 0.03, 0.09 and 0.19 g/100 g of fatty acids for the Control, LLE and HLE treatments, respectively. The transfer efficiency of trans-10, cis-12 CLA from the two levels of CLA supplement into milk fat was not different between treatments and averaged 1.85%. In conclusion, trans-10, cis- 12 CLA reduced milk fat synthesis in lactating goats in a manner similar to that observed for lactating dairy cows and sheep. However, dose-response comparisons suggest that the degree of reduction in milk fat synthesis is less in goats compared with sheep and dairy cows. |
| Databáze: | Directory of Open Access Journals |
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