Supplementing Grazing Dairy Ewes with Plant‐Derived Oil and Rumen‐Protected EPA+DHA Pellets Enhances Health‐Beneficial n−3 Long‐Chain Polyunsaturated Fatty Acids in Sheep Milk
| Autor: | Don V. Nguyen, Quang V. Nguyen, Peter D. Nichols, Bunmi S. Malau-Aduli, Van H. Le, Aduli E. O. Malau-Aduli |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification 030109 nutrition & dietetics Bran Chemistry 0402 animal and dairy science food and beverages Fatty acid 04 agricultural and veterinary sciences General Chemistry 040201 dairy & animal science Eicosapentaenoic acid Industrial and Manufacturing Engineering 03 medical and health sciences Rumen Animal science medicine.anatomical_structure Docosahexaenoic acid Lactation medicine lipids (amino acids peptides and proteins) Sheep milk Food Science Biotechnology Polyunsaturated fatty acid |
| Zdroj: | European Journal of Lipid Science and Technology. 120:1700256 |
| ISSN: | 1438-9312 1438-7697 |
| DOI: | 10.1002/ejlt.201700256 |
| Popis: | This study investigates the impact of supplementing dairy ewes in mid lactation with rumen‐protected (RPO) pellets containing eicosapentaenoic acid (EPA, 20:5n−3) and docosahexaenoic acid (DHA, 22:6n−3) or pellets infused with 50 mL kg−1 DM of either canola (CO), rice bran (RBO), flaxseed (FSO), or safflower (SFO) oils on enhancing the concentration of n−3 long‐chain (≥C20) polyunsaturated fatty acids (n−3 LC‐PUFA) in milk. It is hypothesized that including these oils in the diet of grazing dairy ewes will improve milk fatty acid (FA) composition by increasing levels of n−3 LC‐PUFA. Sixty grazing dairy ewes balanced by sire breed and parity are randomly allocated to one of 6 treatments: 1) Control: commercial pellets without oil inclusion; 2) pellets containing 50 mL kg−1 DM of CO; 3) RBO; 4) FSO; 5) SFO; and 6) RPO at the rate of 1 kg day−1 for each ewe for 8 weeks. Weekly bulked daily milk FA analysis shows RPO has the most efficiency at elevating n−3 LC‐PUFA content by twofold, threefold, and fivefold greater concentrations of EPA, DPA, and DHA, respectively, than the control (0.17 vs 0.08%, 0.23 vs 0.08%, 0.19 vs 0.04%) (P |
| Databáze: | OpenAIRE |
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